微信PC端Hook技术研究-消息防撤销[扩展]
![微信PC端Hook技术研究-消息防撤销[扩展]_第1张图片](http://img.e-com-net.com/image/info8/e299e560d0d14609bdf39ef36af6e4b1.gif)
![微信PC端Hook技术研究-消息防撤销[扩展]_第2张图片](http://img.e-com-net.com/image/info8/b9051280e6a44e6fa415ccc98ebedaef.gif)
5667BC3E |. 6A 00 PUSH 0x0
5667BC40 |. FF70 04 PUSH DWORD PTR DS:[EAX+0x4]
5667BC43 |. E8 B8721700 CALL 567F2F00
5667BC48 |. E8 E36EF4FF CALL 565C2B30 ; 如果这个call执行完 返回的数据是1 则代表是撤回
5667BC4D |. 83C4 14 ADD ESP, 0x14
5667BC50 |. 84C0 TEST AL, AL
5667BC52 74 72 JE SHORT 5667BCC6
5667BC54 |. 0F1005 E03A36>MOVUPS XMM0, DQWORD PTR DS:[0x57363AE0]
5667BC5B |. 83EC 10 SUB ESP, 0x10
5667BC5E |. 8BC4 MOV EAX, ESP
5667BC60 |. 83EC 10 SUB ESP, 0x10
5667BC63 |. 0F1100 MOVUPS DQWORD PTR DS:[EAX], XMM0
5667BC66 |. 8BC4 MOV EAX, ESP
5667BC68 |. 83EC 10 SUB ESP, 0x10
5667BC6B |. 0F1100 MOVUPS DQWORD PTR DS:[EAX], XMM0
5667BC6E |. 8BC4 MOV EAX, ESP
5667BC70 |. 83EC 10 SUB ESP, 0x10
5667BC73 |. 0F1100 MOVUPS DQWORD PTR DS:[EAX], XMM0
5667BC76 |. 8BC4 MOV EAX, ESP
5667BC78 |. 83EC 10 SUB ESP, 0x10
5667BC7B |. 0F1100 MOVUPS DQWORD PTR DS:[EAX], XMM0
5667BC7E |. 8BC4 MOV EAX, ESP
5667BC80 |. 83EC 10 SUB ESP, 0x10
5667BC83 |. 8BCC MOV ECX, ESP
5667BC85 |. FF75 E4 PUSH [LOCAL.7]
5667BC88 |. 0F1100 MOVUPS DQWORD PTR DS:[EAX], XMM0
5667BC8B |. FF75 E0 PUSH [LOCAL.8]
5667BC8E |. E8 1D83D7FF CALL 563F3FB0
5667BC93 |. 68 48053D57 PUSH 573D0548 ; On RevokeMsg svrId : %d
5667BC98 |. 68 5C003D57 PUSH 573D005C ; SyncMgr
5667BC9D |. 68 A4043D57 PUSH 573D04A4 ; SyncMgr::doAddMsg
5667BCA2 |. 68 56050000 PUSH 0x556
5667BCA7 |. BA C8003D57 MOV EDX, 573D00C8 ; 02_manager\SyncMgr.cpp
5667BCAC |. B9 02000000 MOV ECX, 0x2
5667BCB1 |. E8 7A641700 CALL 567F2130
5667BCB6 |. 83C4 70 ADD ESP, 0x70
5667BCB9 |. 8D4D A8 LEA ECX, [LOCAL.22]
5667BCBC |. E8 8F71F4FF CALL 565C2E50
5667BC52 跳转实现的话，可以实现防止撤回，也就是说，在这个跳转区域内，存在撤回的call。
5667BC8E |. E8 1D83D7FF CALL 563F3FB0
5667BCB1 |. E8 7A641700 CALL 567F2130
5667BCBC |. E8 8F71F4FF CALL 565C2E50
经过调试 发现 是在 565C2E50的内部实现的功能，于是跟踪进群
565C2E50 /$ 55 PUSH EBP
565C2E51 |. 8BEC MOV EBP, ESP
565C2E53 |. 6A FF PUSH -0x1
565C2E55 |. 68 38CC1A57 PUSH 571ACC38
565C2E5A |. 64:A1 0000000>MOV EAX, DWORD PTR FS:[0]
565C2E60 |. 50 PUSH EAX
565C2E61 |. 83EC 48 SUB ESP, 0x48
565C2E64 |. 53 PUSH EBX
565C2E65 |. 56 PUSH ESI
565C2E66 |. 57 PUSH EDI
565C2E67 |. A1 C4705657 MOV EAX, DWORD PTR DS:[0x575670C4] ; &(4Y
565C2E6C |. 33C5 XOR EAX, EBP
565C2E6E |. 50 PUSH EAX
565C2E6F |. 8D45 F4 LEA EAX, [LOCAL.3]
565C2E72 |. 64:A3 0000000>MOV DWORD PTR FS:[0], EAX
565C2E78 |. 8BF1 MOV ESI, ECX
565C2E7A |. 8B46 14 MOV EAX, DWORD PTR DS:[ESI+0x14]
565C2E7D |. 85C0 TEST EAX, EAX
565C2E7F |. 75 08 JNZ SHORT 565C2E89
565C2E81 |. A1 14DB5C57 MOV EAX, DWORD PTR DS:[0x575CDB14]
565C2E86 |. 8B40 14 MOV EAX, DWORD PTR DS:[EAX+0x14]
565C2E89 |> 83EC 14 SUB ESP, 0x14
565C2E8C |. 8BCC MOV ECX, ESP
565C2E8E |. 6A 00 PUSH 0x0
565C2E90 |. FF70 04 PUSH DWORD PTR DS:[EAX+0x4]
565C2E93 |. E8 68002300 CALL 567F2F00
565C2E98 |. 8D4D C0 LEA ECX, [LOCAL.16]
565C2E9B |. E8 600A2400 CALL 56803900
565C2EA0 |. 83C4 14 ADD ESP, 0x14
565C2EA3 |. C745 FC 00000>MOV [LOCAL.1], 0x0
565C2EAA |. 837D C4 00 CMP [LOCAL.15], 0x0
565C2EAE |. 0F9EC0 SETLE AL
565C2EB1 |. 84C0 TEST AL, AL
565C2EB3 |. 0F85 36010000 JNZ 565C2FEF
565C2EB9 |. 0F57C0 XORPS XMM0, XMM0
565C2EBC |. C745 BC 00000>MOV [LOCAL.17], 0x0
565C2EC3 |. 6A FF PUSH -0x1
565C2EC5 |. 68 083B3657 PUSH 57363B08
565C2ECA |. 8D4D AC LEA ECX, [LOCAL.21]
565C2ECD |. 66:0F1345 E8 MOVLPS QWORD PTR SS:[EBP-0x18], XMM0
565C2ED2 |. 0F1145 AC MOVUPS DQWORD PTR SS:[EBP-0x54], XMM0
565C2ED6 |. E8 D5012300 CALL 567F30B0
565C2EDB |. 6A FF PUSH -0x1
565C2EDD |. 0F57C0 XORPS XMM0, XMM0
565C2EE0 |. C745 E4 00000>MOV [LOCAL.7], 0x0
565C2EE7 |. 68 083B3657 PUSH 57363B08
565C2EEC |. 8D4D D4 LEA ECX, [LOCAL.11]
565C2EEF |. 0F1145 D4 MOVUPS DQWORD PTR SS:[EBP-0x2C], XMM0
565C2EF3 |. E8 B8012300 CALL 567F30B0
565C2EF8 |. 8D45 D4 LEA EAX, [LOCAL.11]
565C2EFB |. C645 FC 02 MOV BYTE PTR SS:[EBP-0x4], 0x2
565C2EFF |. 50 PUSH EAX
565C2F00 |. 83EC 14 SUB ESP, 0x14
565C2F03 |. 8D7D AC LEA EDI, [LOCAL.21]
565C2F06 |. 8BCC MOV ECX, ESP
565C2F08 |. 8D5D E8 LEA EBX, [LOCAL.6]
565C2F0B |. 6A FF PUSH -0x1
565C2F0D |. C701 00000000 MOV DWORD PTR DS:[ECX], 0x0
565C2F13 |. C741 04 00000>MOV DWORD PTR DS:[ECX+0x4], 0x0
565C2F1A |. C741 08 00000>MOV DWORD PTR DS:[ECX+0x8], 0x0
565C2F21 |. C741 0C 00000>MOV DWORD PTR DS:[ECX+0xC], 0x0
565C2F28 |. C741 10 00000>MOV DWORD PTR DS:[ECX+0x10], 0x0
565C2F2F |. FF75 C0 PUSH [LOCAL.16]
565C2F32 |. E8 79012300 CALL 567F30B0
565C2F37 |. 8BD7 MOV EDX, EDI
565C2F39 |. 8BCB MOV ECX, EBX
565C2F3B |. E8 D0450000 CALL 565C7510
565C2F40 |. 8B7D AC MOV EDI, [LOCAL.21]
565C2F43 |. 83C4 18 ADD ESP, 0x18
565C2F46 |. 84C0 TEST AL, AL
565C2F48 |. 74 45 JE SHORT 565C2F8F
565C2F4A |. 8B76 2C MOV ESI, DWORD PTR DS:[ESI+0x2C]
565C2F4D |. 83EC 14 SUB ESP, 0x14
565C2F50 |. 8BCC MOV ECX, ESP
565C2F52 |. 6A FF PUSH -0x1
565C2F54 |. C701 00000000 MOV DWORD PTR DS:[ECX], 0x0
565C2F5A |. C741 04 00000>MOV DWORD PTR DS:[ECX+0x4], 0x0
565C2F61 |. C741 08 00000>MOV DWORD PTR DS:[ECX+0x8], 0x0
565C2F68 |. 57 PUSH EDI
565C2F69 |. C741 0C 00000>MOV DWORD PTR DS:[ECX+0xC], 0x0
565C2F70 |. C741 10 00000>MOV DWORD PTR DS:[ECX+0x10], 0x0
565C2F77 |. E8 34012300 CALL 567F30B0
565C2F7C |. FF75 EC PUSH [LOCAL.5]
565C2F7F |. 8BD6 MOV EDX, ESI
565C2F81 |. 8D4D D4 LEA ECX, [LOCAL.11]
565C2F84 |. FF75 E8 PUSH [LOCAL.6]
565C2F87 |. E8 94010000 CALL 565C3120 ; 此处可以看到堆栈内有各种相关信息，对Call进行nop之后，发现可以防止撤回，于是继续跟进565C3393 |. E8 18FD2200 CALL 567F30B0 ; eax显示已撤回
565C3398 |. 8D95 58FDFFFF LEA EDX, [LOCAL.170]
565C339E |. 8D4D C4 LEA ECX, [LOCAL.15]
565C33A1 |. E8 FA0C0000 CALL 565C40A0
565C33A6 |. 83C4 14 ADD ESP, 0x14
565C33A9 |. 8D85 C0FDFFFF LEA EAX, [LOCAL.144]
565C33AF |. C645 FC 06 MOV BYTE PTR SS:[EBP-0x4], 0x6
565C33B3 |. 50 PUSH EAX ; eax 消息内容 原始消息内容
565C33B4 |. 8D8D 58FDFFFF LEA ECX, [LOCAL.170]
565C33BA |. E8 6196FEFF CALL 565ACA20
565C33BF |. 8B45 C4 MOV EAX, [LOCAL.15] ; 运行完毕之后 会给eax赋值一个操作，比如 你已经撤回，等等
565C33C2 |. 85C0 TEST EAX, EAX
565C33C4 |> 74 06 JE SHORT 565C33CC
565C33C6 |. 66:8338 00 CMP WORD PTR DS:[EAX], 0x0![微信PC端Hook技术研究-消息防撤销[扩展]_第3张图片](http://img.e-com-net.com/image/info8/5e2c46335b814418a8a488dffb480ef6.jpg)
565C33DA |. 50 PUSH EAX
565C33DB |. E8 D0FC2200 CALL 567F30B0 ; 这里运行一个可能是替换的call
565C33E0 |. 8B85 20FFFFFF MOV EAX, [LOCAL.56]
565C33E6 |. 25 00020000 AND EAX, 0x200
565C33EB |. C785 88FDFFFF>MOV [LOCAL.158], 0x2710wchar_t *__thiscall sub_104830B0(int *this, wchar_t *a2, size_t a3)
{
int *v3; // edi
unsigned int v4; // esi
bool v5; // zf
wchar_t *result; // eax
v3 = this;
if ( a2 && *a2 )
{
v4 = a3;
v5 = a3 == 0;
if ( (a3 & 0x80000000) != 0 )
{
v4 = wcslen(a2);
v5 = v4 == 0;
}
if ( v5 )
{
result = (wchar_t *)*this;
if ( *this )
{
*result = 0;
this[2] = 0;
this[1] = 0;
}
}
else
{
sub_10483930(v4);
wcsncpy((wchar_t *)*v3, a2, v4);
result = (wchar_t *)*v3;
*(_WORD *)(*v3 + 2 * v4) = 0;
v3[1] = v4;
}
}
else
{
result = (wchar_t *)*this;
if ( *this )
{
*result = 0;
this[2] = 0;
this[1] = 0;
}
}
return result;
}