forked from strivexjun/MemoryModulePP
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathMemoryModulePP.c
More file actions
1411 lines (1224 loc) · 41.6 KB
/
MemoryModulePP.c
File metadata and controls
1411 lines (1224 loc) · 41.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* modify by xjun
*/
/*
WIN7 x86 and x64 (Build 7601)
int __stdcall RtlInsertInvertedFunctionTable(PVOID Pointer, PVOID BaseAddress, ULONG uImageSize)
Pointer == LdrpInvertedFunctionTable;
89 48 04 89 01 A3 ?? ?? ?? ?? FF 76 20
.text:7DEBA8E6 89 48 04 mov [eax+4], ecx
.text:7DEBA8E9 89 01 mov [ecx], eax
.text:7DEBA8EB A3 18 02 F7 7D mov dword_7DF70218, eax
.text:7DEBA8F0 FF 76 20 push dword ptr [esi+20h] ; int
.text:7DEBA8F3 FF 76 18 push dword ptr [esi+18h] ; BaseAddress
.text:7DEBA8F6 68 00 22 F7 7D push offset _LdrpInvertedFunctionTable ; Pointer
.text:7DEBA8FB E8 B2 5B FF FF call _RtlInsertInvertedFunctionTable@12 ; RtlInsertInvertedFunctionTable(x,x,x)
/////////////////////////////////////////////////////////////////////////////////////////////////////////
WIN8 x86 and x64 (Build 9600)
int __fastcall RtlInsertInvertedFunctionTable(PVOID BaseAddress, ULONG uImageSize)
33 FF 8B 56 20 8B CB E8
.text:6B2D7980 33 FF xor edi, edi
.text:6B2D7982
.text:6B2D7982 loc_6B2D7982: ; CODE XREF: LdrpProcessMappedModule(x,x)+160¡üj
.text:6B2D7982 ; LdrpProcessMappedModule(x,x)+169¡üj ...
.text:6B2D7982 8B 56 20 mov edx, [esi+20h] ; uImageSize
.text:6B2D7985 8B CB mov ecx, ebx ; BaseAddress
.text:6B2D7987 E8 45 0A 00 00 call _RtlInsertInvertedFunctionTable@8 ; RtlInsertInvertedFunctionTable(x,x)
/////////////////////////////////////////////////////////////////////////////////////////////////////////
WIN10 x86 and x64 (Build 16299)
int __fastcall RtlInsertInvertedFunctionTable(PVOID BaseAddress, ULONG uImageSize)
8B 85 D4 FE FF FF 8B 70 50 8B D6 8B CB E8
.text:4B327344 8B 85 D4 FE FF FF mov eax, [ebp+var_12C]
.text:4B32734A 8B 70 50 mov esi, [eax+50h]
.text:4B32734D 8B D6 mov edx, esi
.text:4B32734F 8B CB mov ecx, ebx
.text:4B327351 E8 42 7A FB FF call _RtlInsertInvertedFunctionTable@8 ; RtlInsertInvertedFunctionTable(x,x)
WIN10 x86 and x64 (Build 15036)
int __fastcall RtlInsertInvertedFunctionTable(PVOID BaseAddress, ULONG uImageSize)
8B 45 F8 8B CE 8B 40 50 8B D0 89 45 F0 E8
.text:4B32DFEC 8B 45 F8 mov eax, [ebp+var_8]
.text:4B32DFEF 8B CE mov ecx, esi
.text:4B32DFF1 8B 40 50 mov eax, [eax+50h]
.text:4B32DFF4 8B D0 mov edx, eax
.text:4B32DFF6 89 45 F0 mov [ebp+var_10], eax
.text:4B32DFF9 E8 3E 2E FA FF call _RtlInsertInvertedFunctionTable@8 ; RtlInsertInvertedFunctionTable(x,x)
WIN10 x86 and x64 (Build 10240)
int __fastcall RtlInsertInvertedFunctionTable(PVOID BaseAddress, ULONG uImageSize)
8B 85 ?? FF FF FF 8B 70 50 8B D6 8B 8D ?? FF FF FF E8
.text:4B31E0CB 8B 85 18 FF FF FF mov eax, [ebp+var_E8]
.text:4B31E0D1 8B 70 50 mov esi, [eax+50h]
.text:4B31E0D4 8B D6 mov edx, esi
.text:4B31E0D6 8B 8D 34 FF FF FF mov ecx, [ebp+BaseAddress]
.text:4B31E0DC E8 E9 50 F9 FF call _RtlInsertInvertedFunctionTable@8 ; RtlInsertInvertedFunctionTable(x,x)
*/
#include <windows.h>
#include <winnt.h>
#include <stddef.h>
#include <tchar.h>
#include <ImageHlp.h>
#ifdef DEBUG_OUTPUT
#include <stdio.h>
#endif
#if _MSC_VER
// Disable warning about data -> function pointer conversion
#pragma warning(disable:4055)
// C4244: conversion from 'uintptr_t' to 'DWORD', possible loss of data.
#pragma warning(error: 4244)
// C4267: conversion from 'size_t' to 'int', possible loss of data.
#pragma warning(error: 4267)
#define inline __inline
#endif
#ifndef IMAGE_SIZEOF_BASE_RELOCATION
// Vista SDKs no longer define IMAGE_SIZEOF_BASE_RELOCATION!?
#define IMAGE_SIZEOF_BASE_RELOCATION (sizeof(IMAGE_BASE_RELOCATION))
#endif
#ifdef _WIN64
#define HOST_MACHINE IMAGE_FILE_MACHINE_AMD64
#else
#define HOST_MACHINE IMAGE_FILE_MACHINE_I386
#endif
#include "MemoryModulePP.h"
ULONG dwMajorVersion = 0;
ULONG dwMinorVersion = 0;
ULONG dwBuildNumber = 0;
PVOID LdrpInvertedFunctionTable = NULL;
typedef int(__stdcall* fnRtlInsertInvertedFunctionTable_Win7)(PVOID Pointer, PVOID BaseAddress, ULONG uImageSize);
fnRtlInsertInvertedFunctionTable_Win7 pfnRtlInsertInvertedFunctionTable_Win7 = NULL;
typedef int(__fastcall* fnRtlInsertInvertedFunctionTable_Win8_Win10)(PVOID BaseAddress, ULONG uImageSize);
fnRtlInsertInvertedFunctionTable_Win8_Win10 pfnRtlInsertInvertedFunctionTable_Win8_Win10 = NULL;
typedef BOOLEAN(__cdecl* fnRtlAddFunctionTable64)(PVOID FunctionTable, DWORD EntryCount, DWORD64 BaseAddress);
fnRtlAddFunctionTable64 pfnRtlAddFunctionTable64 = NULL;
static inline LONG
FindPattern(unsigned char* pSrc, unsigned char* pTrait, int nSrcLen, int nTraitLen)
{
if (IsBadReadPtr(pSrc, sizeof(void*)) == TRUE)
{
return -1;
}
int i, j, k;
for (i = 0; i <= (nSrcLen - nTraitLen); i++)
{
if (pSrc[i] == pTrait[0])
{
k = i;
j = 0;
while (j < nTraitLen)
{
k++; j++;
if (pTrait[j] == 0x90)
{
continue;
}
if (pSrc[k] != pTrait[j])
{
break;
}
}
if (j == nTraitLen)
{
return i;
}
}
}
return -1;
}
static inline uintptr_t
AlignValueDown(uintptr_t value, uintptr_t alignment) {
return value & ~(alignment - 1);
}
static inline LPVOID
AlignAddressDown(LPVOID address, uintptr_t alignment) {
return (LPVOID)AlignValueDown((uintptr_t)address, alignment);
}
static inline size_t
AlignValueUp(size_t value, size_t alignment) {
return (value + alignment - 1) & ~(alignment - 1);
}
static inline void*
OffsetPointer(void* data, ptrdiff_t offset) {
return (void*)((uintptr_t)data + offset);
}
static inline void
OutputLastError(const char *msg)
{
#ifndef DEBUG_OUTPUT
UNREFERENCED_PARAMETER(msg);
#else
LPVOID tmp;
char *tmpmsg;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&tmp, 0, NULL);
tmpmsg = (char *)LocalAlloc(LPTR, strlen(msg) + strlen(tmp) + 3);
sprintf(tmpmsg, "%s: %s", msg, tmp);
OutputDebugString(tmpmsg);
LocalFree(tmpmsg);
LocalFree(tmp);
#endif
}
static BOOL
CheckSize(size_t size, size_t expected) {
if (size < expected) {
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
return TRUE;
}
static BOOL
CopySections(const unsigned char *data, size_t size, PIMAGE_NT_HEADERS old_headers, PMEMORYMODULE module)
{
int i, section_size;
unsigned char *codeBase = module->codeBase;
unsigned char *dest;
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers);
for (i = 0; i < module->headers->FileHeader.NumberOfSections; i++, section++) {
if (section->SizeOfRawData == 0) {
// section doesn't contain data in the dll itself, but may define
// uninitialized data
section_size = old_headers->OptionalHeader.SectionAlignment;
if (section_size > 0) {
dest = (unsigned char *)module->alloc(codeBase + section->VirtualAddress,
section_size,
MEM_COMMIT,
PAGE_READWRITE,
module->userdata);
if (dest == NULL) {
return FALSE;
}
// Always use position from file to support alignments smaller
// than page size (allocation above will align to page size).
dest = codeBase + section->VirtualAddress;
// NOTE: On 64bit systems we truncate to 32bit here but expand
// again later when "PhysicalAddress" is used.
section->Misc.PhysicalAddress = (DWORD)((uintptr_t)dest & 0xffffffff);
memset(dest, 0, section_size);
}
// section is empty
continue;
}
if (!CheckSize(size, section->PointerToRawData + section->SizeOfRawData)) {
return FALSE;
}
// commit memory block and copy data from dll
dest = (unsigned char *)module->alloc(codeBase + section->VirtualAddress,
section->SizeOfRawData,
MEM_COMMIT,
PAGE_READWRITE,
module->userdata);
if (dest == NULL) {
return FALSE;
}
// Always use position from file to support alignments smaller
// than page size (allocation above will align to page size).
dest = codeBase + section->VirtualAddress;
memcpy(dest, data + section->PointerToRawData, section->SizeOfRawData);
// NOTE: On 64bit systems we truncate to 32bit here but expand
// again later when "PhysicalAddress" is used.
section->Misc.PhysicalAddress = (DWORD)((uintptr_t)dest & 0xffffffff);
}
return TRUE;
}
// Protection flags for memory pages (Executable, Readable, Writeable)
static int ProtectionFlags[2][2][2] = {
{
// not executable
{ PAGE_NOACCESS, PAGE_WRITECOPY },
{ PAGE_READONLY, PAGE_READWRITE },
}, {
// executable
{ PAGE_EXECUTE, PAGE_EXECUTE_WRITECOPY },
{ PAGE_EXECUTE_READ, PAGE_EXECUTE_READWRITE },
},
};
static SIZE_T
GetRealSectionSize(PMEMORYMODULE module, PIMAGE_SECTION_HEADER section) {
DWORD size = section->SizeOfRawData;
if (size == 0) {
if (section->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) {
size = module->headers->OptionalHeader.SizeOfInitializedData;
}
else if (section->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) {
size = module->headers->OptionalHeader.SizeOfUninitializedData;
}
}
return (SIZE_T)size;
}
static BOOL
FinalizeSection(PMEMORYMODULE module, PSECTIONFINALIZEDATA sectionData) {
DWORD protect, oldProtect;
BOOL executable;
BOOL readable;
BOOL writeable;
if (sectionData->size == 0) {
return TRUE;
}
if (sectionData->characteristics & IMAGE_SCN_MEM_DISCARDABLE) {
// section is not needed any more and can safely be freed
if (sectionData->address == sectionData->alignedAddress &&
(sectionData->last ||
module->headers->OptionalHeader.SectionAlignment == module->pageSize ||
(sectionData->size % module->pageSize) == 0)
) {
// Only allowed to decommit whole pages
module->free(sectionData->address, sectionData->size, MEM_DECOMMIT, module->userdata);
}
return TRUE;
}
// determine protection flags based on characteristics
executable = (sectionData->characteristics & IMAGE_SCN_MEM_EXECUTE) != 0;
readable = (sectionData->characteristics & IMAGE_SCN_MEM_READ) != 0;
writeable = (sectionData->characteristics & IMAGE_SCN_MEM_WRITE) != 0;
protect = ProtectionFlags[executable][readable][writeable];
if (sectionData->characteristics & IMAGE_SCN_MEM_NOT_CACHED) {
protect |= PAGE_NOCACHE;
}
// change memory access flags
if (VirtualProtect(sectionData->address, sectionData->size, protect, &oldProtect) == 0) {
OutputLastError("Error protecting memory page");
return FALSE;
}
return TRUE;
}
static BOOL
FinalizeSections(PMEMORYMODULE module)
{
int i;
PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers);
#ifdef _WIN64
// "PhysicalAddress" might have been truncated to 32bit above, expand to
// 64bits again.
uintptr_t imageOffset = ((uintptr_t)module->headers->OptionalHeader.ImageBase & 0xffffffff00000000);
#else
static const uintptr_t imageOffset = 0;
#endif
SECTIONFINALIZEDATA sectionData;
sectionData.address = (LPVOID)((uintptr_t)section->Misc.PhysicalAddress | imageOffset);
sectionData.alignedAddress = AlignAddressDown(sectionData.address, module->pageSize);
sectionData.size = GetRealSectionSize(module, section);
sectionData.characteristics = section->Characteristics;
sectionData.last = FALSE;
section++;
// loop through all sections and change access flags
for (i = 1; i<module->headers->FileHeader.NumberOfSections; i++, section++) {
LPVOID sectionAddress = (LPVOID)((uintptr_t)section->Misc.PhysicalAddress | imageOffset);
LPVOID alignedAddress = AlignAddressDown(sectionAddress, module->pageSize);
SIZE_T sectionSize = GetRealSectionSize(module, section);
// Combine access flags of all sections that share a page
// TODO(fancycode): We currently share flags of a trailing large section
// with the page of a first small section. This should be optimized.
if (sectionData.alignedAddress == alignedAddress || (uintptr_t)sectionData.address + sectionData.size >(uintptr_t) alignedAddress) {
// Section shares page with previous
if ((section->Characteristics & IMAGE_SCN_MEM_DISCARDABLE) == 0 || (sectionData.characteristics & IMAGE_SCN_MEM_DISCARDABLE) == 0) {
sectionData.characteristics = (sectionData.characteristics | section->Characteristics) & ~IMAGE_SCN_MEM_DISCARDABLE;
}
else {
sectionData.characteristics |= section->Characteristics;
}
sectionData.size = (((uintptr_t)sectionAddress) + ((uintptr_t)sectionSize)) - (uintptr_t)sectionData.address;
continue;
}
if (!FinalizeSection(module, §ionData)) {
return FALSE;
}
sectionData.address = sectionAddress;
sectionData.alignedAddress = alignedAddress;
sectionData.size = sectionSize;
sectionData.characteristics = section->Characteristics;
}
sectionData.last = TRUE;
if (!FinalizeSection(module, §ionData)) {
return FALSE;
}
return TRUE;
}
static BOOL
ExecuteTLS(PMEMORYMODULE module)
{
unsigned char *codeBase = module->codeBase;
PIMAGE_TLS_DIRECTORY tls;
PIMAGE_TLS_CALLBACK* callback;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_TLS);
if (directory->VirtualAddress == 0) {
return TRUE;
}
tls = (PIMAGE_TLS_DIRECTORY)(codeBase + directory->VirtualAddress);
callback = (PIMAGE_TLS_CALLBACK *)tls->AddressOfCallBacks;
if (callback) {
while (*callback) {
(*callback)((LPVOID)codeBase, DLL_PROCESS_ATTACH, NULL);
callback++;
}
}
return TRUE;
}
static BOOL
PerformBaseRelocation(PMEMORYMODULE module, ptrdiff_t delta)
{
unsigned char *codeBase = module->codeBase;
PIMAGE_BASE_RELOCATION relocation;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_BASERELOC);
if (directory->Size == 0) {
return (delta == 0);
}
relocation = (PIMAGE_BASE_RELOCATION)(codeBase + directory->VirtualAddress);
for (; relocation->VirtualAddress > 0;) {
DWORD i;
unsigned char *dest = codeBase + relocation->VirtualAddress;
unsigned short *relInfo = (unsigned short*)OffsetPointer(relocation, IMAGE_SIZEOF_BASE_RELOCATION);
for (i = 0; i < ((relocation->SizeOfBlock - IMAGE_SIZEOF_BASE_RELOCATION) / 2); i++, relInfo++) {
// the upper 4 bits define the type of relocation
int type = *relInfo >> 12;
// the lower 12 bits define the offset
int offset = *relInfo & 0xfff;
switch (type)
{
case IMAGE_REL_BASED_ABSOLUTE:
// skip relocation
break;
case IMAGE_REL_BASED_HIGHLOW:
// change complete 32 bit address
{
DWORD *patchAddrHL = (DWORD *)(dest + offset);
*patchAddrHL += (DWORD)delta;
}
break;
#ifdef _WIN64
case IMAGE_REL_BASED_DIR64:
{
ULONGLONG *patchAddr64 = (ULONGLONG *) (dest + offset);
*patchAddr64 += (ULONGLONG) delta;
}
break;
#endif
default:
//printf("Unknown relocation: %d\n", type);
break;
}
}
// advance to next relocation block
relocation = (PIMAGE_BASE_RELOCATION)OffsetPointer(relocation, relocation->SizeOfBlock);
}
return TRUE;
}
static BOOL
BuildImportTable(PMEMORYMODULE module)
{
unsigned char *codeBase = module->codeBase;
PIMAGE_IMPORT_DESCRIPTOR importDesc;
BOOL result = TRUE;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_IMPORT);
if (directory->Size == 0) {
return TRUE;
}
importDesc = (PIMAGE_IMPORT_DESCRIPTOR)(codeBase + directory->VirtualAddress);
for (; !IsBadReadPtr(importDesc, sizeof(IMAGE_IMPORT_DESCRIPTOR)) && importDesc->Name; importDesc++) {
uintptr_t *thunkRef;
FARPROC *funcRef;
HCUSTOMMODULE *tmp;
HCUSTOMMODULE handle = module->loadLibrary((LPCSTR)(codeBase + importDesc->Name), module->userdata);
if (handle == NULL) {
SetLastError(ERROR_MOD_NOT_FOUND);
result = FALSE;
break;
}
tmp = (HCUSTOMMODULE *)realloc(module->modules, (module->numModules + 1)*(sizeof(HCUSTOMMODULE)));
if (tmp == NULL) {
module->freeLibrary(handle, module->userdata);
SetLastError(ERROR_OUTOFMEMORY);
result = FALSE;
break;
}
module->modules = tmp;
module->modules[module->numModules++] = handle;
if (importDesc->OriginalFirstThunk) {
thunkRef = (uintptr_t *)(codeBase + importDesc->OriginalFirstThunk);
funcRef = (FARPROC *)(codeBase + importDesc->FirstThunk);
}
else {
// no hint table
thunkRef = (uintptr_t *)(codeBase + importDesc->FirstThunk);
funcRef = (FARPROC *)(codeBase + importDesc->FirstThunk);
}
for (; *thunkRef; thunkRef++, funcRef++) {
if (IMAGE_SNAP_BY_ORDINAL(*thunkRef)) {
*funcRef = module->getProcAddress(handle, (LPCSTR)IMAGE_ORDINAL(*thunkRef), module->userdata);
}
else {
PIMAGE_IMPORT_BY_NAME thunkData = (PIMAGE_IMPORT_BY_NAME)(codeBase + (*thunkRef));
*funcRef = module->getProcAddress(handle, (LPCSTR)&thunkData->Name, module->userdata);
}
if (*funcRef == 0) {
result = FALSE;
break;
}
}
if (!result) {
module->freeLibrary(handle, module->userdata);
SetLastError(ERROR_PROC_NOT_FOUND);
break;
}
}
return result;
}
static VOID
InsertExceptionTable(PMEMORYMODULE module)
{
#if defined(_WIN64)
PIMAGE_DATA_DIRECTORY pDataTable = \
&module->headers->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXCEPTION];
PIMAGE_RUNTIME_FUNCTION_ENTRY pFuncTable = \
(PIMAGE_RUNTIME_FUNCTION_ENTRY)((ULONG_PTR)module->codeBase + pDataTable->VirtualAddress);
if (pfnRtlAddFunctionTable64 != NULL)
{
pfnRtlAddFunctionTable64(pFuncTable, pDataTable->Size / sizeof(IMAGE_RUNTIME_FUNCTION_ENTRY), (DWORD64)module->codeBase);
}
#else
if (dwMajorVersion == 6 && dwMinorVersion == 1) //WIM7
{
if (pfnRtlInsertInvertedFunctionTable_Win7 != NULL);
{
pfnRtlInsertInvertedFunctionTable_Win7(LdrpInvertedFunctionTable, module->codeBase, module->headers->OptionalHeader.SizeOfImage);
}
}
else if (dwMajorVersion == 6 && dwMinorVersion == 3) //WIN8
{
if (pfnRtlInsertInvertedFunctionTable_Win8_Win10 != NULL);
{
pfnRtlInsertInvertedFunctionTable_Win8_Win10(module->codeBase, module->headers->OptionalHeader.SizeOfImage);
}
}
else if (dwMajorVersion == 10 && dwMinorVersion == 0) //WIN10
{
if (pfnRtlInsertInvertedFunctionTable_Win8_Win10 != NULL);
{
pfnRtlInsertInvertedFunctionTable_Win8_Win10(module->codeBase, module->headers->OptionalHeader.SizeOfImage);
}
}
else
{
// not support
}
#endif
}
static VOID
InitFindExceptPrivateFunc()
{
PVOID pNtdllCode;
ULONG uNtdllCodeSize;
PIMAGE_DOS_HEADER pDosHead;
PIMAGE_NT_HEADERS pNtHead;
PIMAGE_SECTION_HEADER pSection;
pDosHead = (PIMAGE_DOS_HEADER)GetModuleHandle(TEXT("ntdll"));
if (pDosHead->e_magic != IMAGE_DOS_SIGNATURE)
{
return;
}
pNtHead = (PIMAGE_NT_HEADERS)((ULONG_PTR)pDosHead + pDosHead->e_lfanew);
if (pNtHead->Signature != IMAGE_NT_SIGNATURE)
{
return;
}
pSection = IMAGE_FIRST_SECTION(pNtHead);
for (int i = 0; i < pNtHead->FileHeader.NumberOfSections; i++)
{
if (stricmp(pSection->Name, ".text") == 0 &&
(pSection->Characteristics & IMAGE_SCN_MEM_EXECUTE))
{
break;
}
pSection++;
}
pNtdllCode = (PVOID)((ULONG_PTR)pDosHead + pSection->VirtualAddress);
uNtdllCodeSize = pSection->SizeOfRawData;
if (dwMajorVersion == 6 && dwMinorVersion == 1) //WIM7
{
LONG lResult;
LONG lCallBuf;
unsigned char ida_chars[] = {
0x89, 0x48, 0x04, 0x89, 0x01, 0xA3, 0x90, 0x90, 0x90,
0x90, 0xFF, 0x76, 0x20
};
lResult = FindPattern(pNtdllCode, ida_chars, uNtdllCodeSize, sizeof(ida_chars));
if (lResult != -1)
{
LdrpInvertedFunctionTable = (PVOID)(*(LONG*)((ULONG_PTR)pNtdllCode + lResult + 0x11));
lCallBuf = *(LONG*)((ULONG_PTR)pNtdllCode + lResult + 0x16);
pfnRtlInsertInvertedFunctionTable_Win7 = \
(fnRtlInsertInvertedFunctionTable_Win7)((ULONG_PTR)pNtdllCode + lResult + 0x15 + 0x5 + lCallBuf);
}
}
else if (dwMajorVersion == 6 && dwMinorVersion == 3) //WIN8
{
LONG lResult;
LONG lCallBuf;
unsigned char ida_chars[] = {
0x33, 0xFF, 0x8B, 0x56, 0x20, 0x8B, 0xCB, 0xE8
};
lResult = FindPattern(pNtdllCode, ida_chars, uNtdllCodeSize, sizeof(ida_chars));
if (lResult != -1)
{
lCallBuf = *(LONG*)((ULONG_PTR)pNtdllCode + lResult + 0x8);
pfnRtlInsertInvertedFunctionTable_Win8_Win10 = \
(fnRtlInsertInvertedFunctionTable_Win8_Win10)((ULONG_PTR)pNtdllCode + lResult + 0x7 + 0x5 + lCallBuf);
}
}
else if (dwMajorVersion == 10 && dwMinorVersion == 0) //WIN10
{
LONG lResult;
LONG lCallBuf;
unsigned char ida_chars1[] = {
0x8B, 0x85, 0xD4, 0xFE, 0xFF, 0xFF, 0x8B, 0x70, 0x50,
0x8B, 0xD6, 0x8B, 0xCB, 0xE8
};
unsigned char ida_chars2[] = {
0x8B, 0x45, 0xF8, 0x8B, 0xCE, 0x8B, 0x40, 0x50, 0x8B,
0xD0, 0x89, 0x45, 0xF0, 0xE8
};
unsigned char ida_chars3[] = {
0x8B, 0x85, 0x90, 0xFF, 0xFF, 0xFF, 0x8B, 0x70, 0x50,
0x8B, 0xD6, 0x8B, 0x8D, 0x90, 0xFF, 0xFF, 0xFF, 0xE8
};
if ((lResult = FindPattern(pNtdllCode, ida_chars1, uNtdllCodeSize, sizeof(ida_chars1))) != -1)
{
lCallBuf = *(LONG*)((ULONG_PTR)pNtdllCode + lResult + 0xE);
pfnRtlInsertInvertedFunctionTable_Win8_Win10 = \
(fnRtlInsertInvertedFunctionTable_Win8_Win10)((ULONG_PTR)pNtdllCode + lResult + 0xD + 0x5 + lCallBuf);
}
else if ((lResult = FindPattern(pNtdllCode, ida_chars2, uNtdllCodeSize, sizeof(ida_chars2))) != -1)
{
lCallBuf = *(LONG*)((ULONG_PTR)pNtdllCode + lResult + 0xE);
pfnRtlInsertInvertedFunctionTable_Win8_Win10 = \
(fnRtlInsertInvertedFunctionTable_Win8_Win10)((ULONG_PTR)pNtdllCode + lResult + 0xD + 0x5 + lCallBuf);
}
else if ((lResult = FindPattern(pNtdllCode, ida_chars3, uNtdllCodeSize, sizeof(ida_chars3))) != -1)
{
lCallBuf = *(LONG*)((ULONG_PTR)pNtdllCode + lResult + 0x12);
pfnRtlInsertInvertedFunctionTable_Win8_Win10 = \
(fnRtlInsertInvertedFunctionTable_Win8_Win10)((ULONG_PTR)pNtdllCode + lResult + 0x11 + 0x5 + lCallBuf);
}
else
{
// not support;
}
}
else
{
// not support
}
}
LPVOID MemoryDefaultAlloc(LPVOID address, SIZE_T size, DWORD allocationType, DWORD protect, void* userdata)
{
UNREFERENCED_PARAMETER(userdata);
return VirtualAlloc(address, size, allocationType, protect);
}
BOOL MemoryDefaultFree(LPVOID lpAddress, SIZE_T dwSize, DWORD dwFreeType, void* userdata)
{
UNREFERENCED_PARAMETER(userdata);
return VirtualFree(lpAddress, dwSize, dwFreeType);
}
HCUSTOMMODULE MemoryDefaultLoadLibrary(LPCSTR filename, void *userdata)
{
HMODULE result;
UNREFERENCED_PARAMETER(userdata);
result = LoadLibraryA(filename);
if (result == NULL) {
return NULL;
}
return (HCUSTOMMODULE)result;
}
FARPROC MemoryDefaultGetProcAddress(HCUSTOMMODULE module, LPCSTR name, void *userdata)
{
UNREFERENCED_PARAMETER(userdata);
return (FARPROC)GetProcAddress((HMODULE)module, name);
}
void MemoryDefaultFreeLibrary(HCUSTOMMODULE module, void *userdata)
{
UNREFERENCED_PARAMETER(userdata);
FreeLibrary((HMODULE)module);
}
PMEMORYMODULE MemoryLoadLibrary(const void *data, size_t size)
{
return MemoryLoadLibraryEx(data, size, MemoryDefaultAlloc, MemoryDefaultFree, MemoryDefaultLoadLibrary, MemoryDefaultGetProcAddress, MemoryDefaultFreeLibrary, NULL);
}
PMEMORYMODULE MemoryLoadLibraryEx(const void *data, size_t size,
CustomAllocFunc allocMemory,
CustomFreeFunc freeMemory,
CustomLoadLibraryFunc loadLibrary,
CustomGetProcAddressFunc getProcAddress,
CustomFreeLibraryFunc freeLibrary,
void *userdata)
{
PMEMORYMODULE result = NULL;
PIMAGE_DOS_HEADER dos_header;
PIMAGE_NT_HEADERS old_header;
unsigned char *code, *headers;
ptrdiff_t locationDelta;
SYSTEM_INFO sysInfo;
PIMAGE_SECTION_HEADER section;
DWORD i;
size_t optionalSectionSize;
size_t lastSectionEnd = 0;
size_t alignedImageSize;
static BOOL g_bInit = FALSE;
if (_InterlockedCompareExchange((LONG*)&g_bInit, TRUE, FALSE) == FALSE)
{
#if defined(_WIN64)
pfnRtlAddFunctionTable64 = (fnRtlAddFunctionTable64)GetProcAddress(GetModuleHandle(TEXT("ntdll")), "RtlAddFunctionTable");
#else
RTL_OSVERSIONINFOW osinfo = { 0 };
typedef LONG(__stdcall *fnRtlGetVersion)(PRTL_OSVERSIONINFOW lpVersionInformation);
fnRtlGetVersion pfnRtlGetVersion = (fnRtlGetVersion)GetProcAddress(GetModuleHandle(TEXT("ntdll.dll")), "RtlGetVersion");
if (pfnRtlGetVersion != NULL && pfnRtlGetVersion(&osinfo) == 0)
{
dwMajorVersion = osinfo.dwMajorVersion;
dwMinorVersion = osinfo.dwMinorVersion;
dwBuildNumber = osinfo.dwBuildNumber;
InitFindExceptPrivateFunc();
}
#endif
}
if (!CheckSize(size, sizeof(IMAGE_DOS_HEADER))) {
return NULL;
}
dos_header = (PIMAGE_DOS_HEADER)data;
if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) {
SetLastError(ERROR_BAD_EXE_FORMAT);
return NULL;
}
if (!CheckSize(size, dos_header->e_lfanew + sizeof(IMAGE_NT_HEADERS))) {
return NULL;
}
old_header = (PIMAGE_NT_HEADERS)&((const unsigned char *)(data))[dos_header->e_lfanew];
if (old_header->Signature != IMAGE_NT_SIGNATURE) {
SetLastError(ERROR_BAD_EXE_FORMAT);
return NULL;
}
if (old_header->FileHeader.Machine != HOST_MACHINE) {
SetLastError(ERROR_BAD_EXE_FORMAT);
return NULL;
}
if (old_header->OptionalHeader.SectionAlignment & 1) {
// Only support section alignments that are a multiple of 2
SetLastError(ERROR_BAD_EXE_FORMAT);
return NULL;
}
section = IMAGE_FIRST_SECTION(old_header);
optionalSectionSize = old_header->OptionalHeader.SectionAlignment;
for (i = 0; i < old_header->FileHeader.NumberOfSections; i++, section++) {
size_t endOfSection;
if (section->SizeOfRawData == 0) {
// Section without data in the DLL
endOfSection = section->VirtualAddress + optionalSectionSize;
}
else {
endOfSection = section->VirtualAddress + section->SizeOfRawData;
}
if (endOfSection > lastSectionEnd) {
lastSectionEnd = endOfSection;
}
}
GetNativeSystemInfo(&sysInfo);
alignedImageSize = AlignValueUp(old_header->OptionalHeader.SizeOfImage, sysInfo.dwPageSize);
if (alignedImageSize != AlignValueUp(lastSectionEnd, sysInfo.dwPageSize)) {
SetLastError(ERROR_BAD_EXE_FORMAT);
return NULL;
}
// reserve memory for image of library
// XXX: is it correct to commit the complete memory region at once?
// calling DllEntry raises an exception if we don't...
code = (unsigned char *)allocMemory((LPVOID)(old_header->OptionalHeader.ImageBase),
alignedImageSize,
MEM_RESERVE | MEM_COMMIT,
PAGE_READWRITE,
userdata);
if (code == NULL) {
// try to allocate memory at arbitrary position
code = (unsigned char *)allocMemory(NULL,
alignedImageSize,
MEM_RESERVE | MEM_COMMIT,
PAGE_READWRITE,
userdata);
if (code == NULL) {
SetLastError(ERROR_OUTOFMEMORY);
return NULL;
}
}
result = (PMEMORYMODULE)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MEMORYMODULE));
if (result == NULL) {
freeMemory(code, 0, MEM_RELEASE, userdata);
SetLastError(ERROR_OUTOFMEMORY);
return NULL;
}
result->codeBase = code;
result->isDLL = (old_header->FileHeader.Characteristics & IMAGE_FILE_DLL) != 0;
result->alloc = allocMemory;
result->free = freeMemory;
result->loadLibrary = loadLibrary;
result->getProcAddress = getProcAddress;
result->freeLibrary = freeLibrary;
result->userdata = userdata;
result->pageSize = sysInfo.dwPageSize;
if (!CheckSize(size, old_header->OptionalHeader.SizeOfHeaders)) {
goto error;
}
// commit memory for headers
headers = (unsigned char *)allocMemory(code,
old_header->OptionalHeader.SizeOfHeaders,
MEM_COMMIT,
PAGE_READWRITE,
userdata);
// copy PE header to code
memcpy(headers, dos_header, old_header->OptionalHeader.SizeOfHeaders);
result->headers = (PIMAGE_NT_HEADERS)&((const unsigned char *)(headers))[dos_header->e_lfanew];
// update position
result->headers->OptionalHeader.ImageBase = (uintptr_t)code;
// copy sections from DLL file block to new memory location
if (!CopySections((const unsigned char *)data, size, old_header, result)) {
goto error;
}
// adjust base address of imported data
locationDelta = (ptrdiff_t)(result->headers->OptionalHeader.ImageBase - old_header->OptionalHeader.ImageBase);
if (locationDelta != 0) {
//if not exist reloc table?
if (result->headers->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC].VirtualAddress == 0){
goto error;
}
result->isRelocated = PerformBaseRelocation(result, locationDelta);
}
else {
result->isRelocated = TRUE;
}
// load required dlls and adjust function table of imports
if (!BuildImportTable(result)) {
goto error;
}
// mark memory pages depending on section headers and release
// sections that are marked as "discardable"
if (!FinalizeSections(result)) {
goto error;
}
// TLS callbacks are executed BEFORE the main loading
if (!ExecuteTLS(result)) {
goto error;
}
// support exception
InsertExceptionTable(result);
// get entry point of loaded library
if (result->headers->OptionalHeader.AddressOfEntryPoint != 0) {
if (result->isDLL) {
DllEntryProc DllEntry = (DllEntryProc)(LPVOID)(code + result->headers->OptionalHeader.AddressOfEntryPoint);
// notify library about attaching to process
BOOL successfull = (*DllEntry)((HINSTANCE)code, DLL_PROCESS_ATTACH, 0);
if (!successfull) {
SetLastError(ERROR_DLL_INIT_FAILED);
goto error;
}
result->initialized = TRUE;
}
else {
result->exeEntry = (ExeEntryProc)(LPVOID)(code + result->headers->OptionalHeader.AddressOfEntryPoint);
}
}
else {
result->exeEntry = NULL;
}
return (PMEMORYMODULE)result;
error:
// cleanup
MemoryFreeLibrary(result);
return NULL;
}
static int _compare(const void *a, const void *b)
{
const struct ExportNameEntry *p1 = (const struct ExportNameEntry*) a;
const struct ExportNameEntry *p2 = (const struct ExportNameEntry*) b;
return _stricmp(p1->name, p2->name);
}
static int _find(const void *a, const void *b)
{
LPCSTR *name = (LPCSTR *)a;
const struct ExportNameEntry *p = (const struct ExportNameEntry*) b;
return _stricmp(*name, p->name);
}
FARPROC MemoryGetProcAddress(PMEMORYMODULE mod, LPCSTR name)
{
PMEMORYMODULE module = (PMEMORYMODULE)mod;
unsigned char *codeBase = module->codeBase;
DWORD idx = 0;
PIMAGE_EXPORT_DIRECTORY exports;
PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_EXPORT);
if (directory->Size == 0) {
// no export table found
SetLastError(ERROR_PROC_NOT_FOUND);
return NULL;
}
exports = (PIMAGE_EXPORT_DIRECTORY)(codeBase + directory->VirtualAddress);
if (exports->NumberOfNames == 0 || exports->NumberOfFunctions == 0) {
// DLL doesn't export anything
SetLastError(ERROR_PROC_NOT_FOUND);
return NULL;