【破解作者】 stasi[DCM][BCG][DFCG][FCG][OCN][CZG][D.4s]
【作者邮箱】 stasi@163.com
【使用工具】 OD(diy)+LordPE+ImportREC+peditor+PEComAngela
【破解平台】 Win9x/NT/2000/XP
【软件名称】 mirrg.dll
【软件简介】 传到邮箱里的，看名字估计是网游的外挂
【软件大小】 200k
【加壳方式】 tElock+ PECompact
【破解声明】 我是一只小菜鸟，偶得一点心得，愿与大家分享：）
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【破解内容】
peid0.93查出是tElock 0.98b1 -> tE!，这个壳的重定位表处理很容易能处理的，起先我把输入表和重定位表处理过
后，就直接code段断下，就直接在loaddll.exe的里运行了，以为是断点设置问题，费了很多时间，后来的时候发现
是两重壳tElock+ PECompact的dll，仔细的处理，也是很简单的过程
把“忽略在KERNEL32中的内存访问异常”、“INT3中断”、“单步中断” 这3个选项选上
od停在这里
1004A0A7 F7F3 div ebx 第一次异常
1004A0A9 64:67:8F06 0000 pop dword ptr fs:[0]
1004A0AF 83C4 04 add esp,4
1004A0B2 66:BE 4746 mov si,4647
1004A0B6 66:BF 4D4A mov di,4A4D
1004A0BA 8A85 99000000 mov al,byte ptr ss:[ebp+99]
1004A0C0 E9 9C000000 jmp 1004A161
1004A6A8 8DC0 lea eax,eax 非法使用寄存器
1004A6AA 74 03 je short 1004A6AF
1004A6AC CD20 64678F06 vxdcall 68F6764
1004A6B2 0000 add byte ptr ds:[eax],al
1004A6B4 EB 02 jmp short 1004A6B8
1004A6B6 CD20 5961F58D vxdcall 8DF56159
1004A6BC 74 15 je short 1004A6D3
1004A6BE 0083 C2228BFE add byte ptr ds:[ebx+FE8B22C2],al
1004AAA1 66:F7F3 div bx 第三次异常
1004AAA4 0F85 5B010000 jnz 1004AC05
1004AAAA 0F84 55010000 je 1004AC05
1004AAB0 8D85 430A0000 lea eax,dword ptr ss:[ebp+A43]
1004AAB6 894424 04 mov dword ptr ss:[esp+4],eax
1004AABA 64:67:8926 0000 mov dword ptr fs:[0],esp
1004AAC0 EB 12 jmp short 1004AAD4
1004AB67 F7F3 div ebx 第四次异常
1004AB69 85D2 test edx,edx
1004AB6B 0F84 94000000 je 1004AC05
1004AB71 8D85 050B0000 lea eax,dword ptr ss:[ebp+B05]
1004AB77 894424 04 mov dword ptr ss:[esp+4],eax
1004AB7B 64:67:8926 0000 mov dword ptr fs:[0],esp
1004AB81 EB 11 jmp short 1004AB94
1004AB83 - E9 8B642408 jmp 18291013
1004ABA6 CD 68 int 68 第五次异常
1004ABA8 66:05 7B0C add ax,0C7B
1004ABAC 66:48 dec ax
1004ABAE 74 55 je short 1004AC05
1004B6F1 8DC0 lea eax,eax 非法使用寄存器
1004B6F3 EB 01 jmp short mirrg.1004B6F6
1004B6F5 EB 68 jmp short mirrg.1004B75F
1004B6F7 33C0 xor eax,eax
1004B6F9 - EB FE jmp short mirrg.1004B6F9
看堆栈
0006FB78 0006FC34 指针到下一个 SEH 记录
0006FB7C 1004B6FF SE 句柄 返回地址，下断
0006FB80 1004B714 mirrg.1004B714
1004B6FF 8B6424 08 mov esp,dword ptr ss:[esp+8]
1004B703 33C0 xor eax,eax
1004B705 FF6424 08 jmp dword ptr ss:[esp+8]
1004B714 64:8F00 pop dword ptr fs:[eax] ; 0006FC34
1004B717 58 pop eax
1004B718 EB 02 jmp short mirrg.1004B71C
1004B71C 58 pop eax ; mirrg.1004B714
1004B71D 5D pop ebp
1004B71E 85E4 test esp,esp
1004B720 79 03 jns short mirrg.1004B725
1004B725 83D0 FF adc eax,-1
1004B728 E8 75000000 call mirrg.1004B7A2
1004B72D FD std code有变化 解开一段
1004B72D 8B9D 82D34000 mov ebx,dword ptr ss:[ebp+40D382]
1004B733 33F6 xor esi,esi
1004B735 F7D3 not ebx
1004B737 0BF3 or esi,ebx
1004B739 75 08 jnz short mirrg.1004B743
1004B73B 8D9D A2B64000 lea ebx,dword ptr ss:[ebp+40B6A2]
1004B741 EB 06 jmp short mirrg.1004B749
1004B743 039D 62D34000 add ebx,dword ptr ss:[ebp+40D362]
1004B749 895C24 F0 mov dword ptr ss:[esp-10],ebx
1004B74D 8DBD 84D24000 lea edi,dword ptr ss:[ebp+40D284]
1004B753 33C0 xor eax,eax
1004B755 B9 9E030000 mov ecx,39E
1004B75A F3:AA rep stos byte ptr es:[edi]
1004B75C 8DBD A2B64000 lea edi,dword ptr ss:[ebp+40B6A2]
1004B762 B9 58170000 mov ecx,1758
1004B767 F3:AA rep stos byte ptr es:[edi]
1004B769 66:AB stos word ptr es:[edi]
1004B76B 8DBD A2B64000 lea edi,dword ptr ss:[ebp+40B6A2]
1004B771 85F6 test esi,esi
1004B773 75 08 jnz short mirrg.1004B77D
1004B759 00F3 add bl,dh
1004B75B AA stos byte ptr es:[edi]
1004B75C 8DBD A2B64000 lea edi,dword ptr ss:[ebp+40B6A2]
1004B762 B9 58170000 mov ecx,1758
1004B767 F3:AA rep stos byte ptr es:[edi]
1004B769 66:AB stos word ptr es:[edi]
1004B76B 8DBD A2B64000 lea edi,dword ptr ss:[ebp+40B6A2]
1004B771 85F6 test esi,esi
1004B773 75 08 jnz short mirrg.1004B77D
1004B775 C707 33C040C3 mov dword ptr ds:[edi],C340C033
1004B77B EB 0B jmp short mirrg.1004B788
1004B77D C607 E9 mov byte ptr ds:[edi],0E9
1004B780 47 inc edi
1004B781 2BDF sub ebx,edi
1004B783 83EB 04 sub ebx,4
1004B786 891F mov dword ptr ds:[edi],ebx
1004B788 8DBD FACD4000 lea edi,dword ptr ss:[ebp+40CDFA]
1004B78E B9 2C000000 mov ecx,2C
1004B793 F3:AA rep stos byte ptr es:[edi]
1004B795 66:AB stos word ptr es:[edi]
1004B797 EB 02 jmp short mirrg.1004B79B
1004B79B 61 popad 堆栈恢复
1004B79C FF6424 D0 jmp dword ptr ss:[esp-30]
设置硬件执行断点，方便再次load ，并忽略所有异常
10045000 /EB 06 jmp short mirrg.10045008 PECompact 1.68 - 1.84 -> Jeremy Collake的入口
10045002 |68 3ED10000 push 0D13E 基址10000000 oep=1000D13E
10045007 |C3 retn
10045008 \9C pushfd
10045009 60 pushad
1004500A E8 02000000 call rdmIR.10045011 jmp过
1004500F 33C0 xor eax,eax
10045011 8BC4 mov eax,esp
10045013 83C0 04 add eax,4
10045016 93 xchg eax,ebx
10045017 8BE3 mov esp,ebx
10045019 8B5B FC mov ebx,dword ptr ds:[ebx-4]
1004501C 81EB 3F904000 sub ebx,40903F
10045022 87DD xchg ebp,ebx
1004506C 8DB5 AC904000 lea esi,dword ptr ss:[ebp+4090AC]
10045072 B9 40040000 mov ecx,440
10045077 F3:A5 rep movs dword ptr es:[edi],dword p>
10045079 8BFB mov edi,ebx ; mirrg.1004617B
1004507B C3 retn 返回
1004617B BD CFD0C30F mov ebp,0FC3D0CF
10046180 8BF7 mov esi,edi
10046182 83C6 54 add esi,54
10046185 81C7 FF100000 add edi,10FF
1004618B 56 push esi
1004624D 57 push edi
1004624E AD lods dword ptr ds:[esi]
1004624F 85C0 test eax,eax
10046251 0F84 9B000000 je mirrg.100462F2 这里下断，f9 跳走
10046257 8BD0 mov edx,eax
10046259 0395 E6904000 add edx,dword ptr ss:[ebp+4090E6]
1004625F AD lods dword ptr ds:[esi]
10046260 56 push esi
10046261 8BC8 mov ecx,eax
10046263 57 push edi
10046264 52 push edx
10046265 8DB5 6BA14000 lea esi,dword ptr ss:[ebp+40A16B]
1004626B 57 push edi
1004626C 51 push ecx
1004626D 52 push edx
1004626E 6A 40 push 40
10046270 56 push esi
10046271 FFB5 3D974000 push dword ptr ss:[ebp+40973D]
10046277 FFB5 39974000 push dword ptr ss:[ebp+409739]
1004627D E8 B8090000 call mirrg.10046C3A
10046282 5A pop edx
10046283 5F pop edi
10046284 8D85 E4914000 lea eax,dword ptr ss:[ebp+4091E4]
1004628A 50 push eax
1004628B 64:67:FF36 0000 push dword ptr fs:[0]
10046291 64:67:8926 0000 mov dword ptr fs:[0],esp
10046297 52 push edx
10046298 57 push edi
10046299 FF95 DA904000 call dword ptr ss:[ebp+4090DA]
1004629F 64:67:8F06 0000 pop dword ptr fs:[0]
100462A5 83C4 04 add esp,4
100462A8 85C0 test eax,eax
100462AA 74 07 je short mirrg.100462B3
100462AC 8BC8 mov ecx,eax
100462AE 5E pop esi
100462AF 5F pop edi
100462B0 ^ EB 9B jmp short mirrg.1004624D
100462B2 B9 E8000000 mov ecx,0E8 这里会跑飞，在上面的code里找出口
100462F1 24 5F and al,5F
100462F3 8BB5 E2904000 mov esi,dword ptr ss:[ebp+4090E2]
100462F9 AD lods dword ptr ds:[esi]
100462FA 83F8 FF cmp eax,-1
100462FD 74 74 je short mirrg.10046373 一样的处理方法
100462FF 0385 E6904000 add eax,dword ptr ss:[ebp+4090E6]
10046305 8BD8 mov ebx,eax
10046307 AD lods dword ptr ds:[esi]
10046308 0385 E6904000 add eax,dword ptr ss:[ebp+4090E6]
1004630E 8BD0 mov edx,eax
10046310 AD lods dword ptr ds:[esi]
10046311 8BC8 mov ecx,eax
10046313 57 push edi
10046314 56 push esi
10046315 8BF3 mov esi,ebx
10046317 57 push edi
10046318 51 push ecx
10046319 8BC1 mov eax,ecx
1004631B C1F9 02 sar ecx,2
1004631E F3:A5 rep movs dword ptr es:[edi],dword p>
10046320 03C8 add ecx,eax
10046322 83E1 03 and ecx,3
10046325 F3:A4 rep movs byte ptr es:[edi],byte ptr>
10046327 59 pop ecx
10046328 5E pop esi
10046329 8BFA mov edi,edx
1004632B 8BC1 mov eax,ecx
1004632D C1F9 02 sar ecx,2
10046330 F3:A5 rep movs dword ptr es:[edi],dword p>
10046332 03C8 add ecx,eax
10046334 83E1 03 and ecx,3
10046337 F3:A4 rep movs byte ptr es:[edi],byte ptr>
10046339 5E pop esi
1004633A AD lods dword ptr ds:[esi]
1004633B 8BC8 mov ecx,eax
1004633D 8BD0 mov edx,eax
1004633F 33C0 xor eax,eax
10046341 C1F9 02 sar ecx,2
10046344 F3:AB rep stos dword ptr es:[edi]
10046346 03CA add ecx,edx
10046348 83E1 03 and ecx,3
1004634B F3:AA rep stos byte ptr es:[edi]
1004634D 8B7E F0 mov edi,dword ptr ds:[esi-10]
10046350 03BD E6904000 add edi,dword ptr ss:[ebp+4090E6]
10046356 8B4E F4 mov ecx,dword ptr ds:[esi-C]
10046359 038D E6904000 add ecx,dword ptr ss:[ebp+4090E6]
1004635F 2BCF sub ecx,edi
10046361 8BD1 mov edx,ecx
10046363 C1F9 02 sar ecx,2
10046366 F3:AB rep stos dword ptr es:[edi]
10046368 03CA add ecx,edx
1004636A 83E1 03 and ecx,3
1004636D F3:AA rep stos byte ptr es:[edi]
1004636F 5F pop edi
10046370 ^ EB 87 jmp short mirrg.100462F9
10046373 68 00400000 push 4000 申请空间
10046378 6A 00 push 0
1004637A 57 push edi
1004637B FF95 45974000 call dword ptr ss:[ebp+409745]
10046381 8BBD 3C964000 mov edi,dword ptr ss:[ebp+40963C]
1004639F 49 dec ecx
100463A0 74 72 je short mirrg.10046414
100463A2 78 70 js short mirrg.10046414
100463A4 66:8B07 mov ax,word ptr ds:[edi]
100463A7 2C E8 sub al,0E8
100463A9 3C 01 cmp al,1
100463AB 76 38 jbe short mirrg.100463E5
100463AD 66:3D 1725 cmp ax,2517
100463B1 74 51 je short mirrg.10046404
100463B3 3C 27 cmp al,27
100463B5 75 0A jnz short mirrg.100463C1
100463B7 80FC 80 cmp ah,80
100463BA 72 05 jb short mirrg.100463C1
100463BC 80FC 8F cmp ah,8F
100463BF 76 05 jbe short mirrg.100463C6
100463C1 47 inc edi
100463C2 43 inc ebx
100463C3 ^ EB DA jmp short mirrg.1004639F
100463C5 B8 8B47023C mov eax,3C02478B
100463CA 0975 0E or dword ptr ss:[ebp+E],esi
100463CD 66:C1E8 08 shr ax,8
100463D1 C1C0 10 rol eax,10
100463D4 86C4 xchg ah,al
100463D6 2BC3 sub eax,ebx
100463D8 8947 02 mov dword ptr ds:[edi+2],eax
100463DB BE 06000000 mov esi,6
100463E0 83E9 05 sub ecx,5
100463E3 ^ EB B6 jmp short mirrg.1004639B
100463E5 8B47 01 mov eax,dword ptr ds:[edi+1] 这里下断
找到处理重定位表的位置
10046652 8B9D E6904000 mov ebx,dword ptr ss:[ebp+4090E6] 基址10000000
10046658 3B9D 5F974000 cmp ebx,dword ptr ss:[ebp+40975F]
1004665E 75 01 jnz short mirrg.10046661 与映像基址不相等就处理重定位
10046660 C3 retn 改变标志，使之跳转
10046661 8BB5 63974000 mov esi,dword ptr ss:[ebp+409763] esi=0003D000重定位表开始地址
10046667 03F3 add esi,ebx
10046669 33C0 xor eax,eax
1004666B 66:8B43 3C mov ax,word ptr ds:[ebx+3C]
1004666F 03C3 add eax,ebx
10046671 8B80 C0000000 mov eax,dword ptr ds:[eax+C0]
10046677 85C0 test eax,eax
10046679 75 08 jnz short mirrg.10046683
1004667B 2B9D 5F974000 sub ebx,dword ptr ss:[ebp+40975F]
10046681 EB 0F jmp short mirrg.10046692
10046683 03C3 add eax,ebx
10046685 2B9D 5F974000 sub ebx,dword ptr ss:[ebp+40975F]
1004668B 0118 add dword ptr ds:[eax],ebx
1004668D 83C0 04 add eax,4
10046690 0118 add dword ptr ds:[eax],ebx
10046692 AD lods dword ptr ds:[esi]
10046693 0BC0 or eax,eax
10046695 74 6F je short mirrg.10046706 这里下断，可以看到结束地址
ESI=100403E8
10046697 8BD0 mov edx,eax
10046699 0395 E6904000 add edx,dword ptr ss:[ebp+4090E6]
1004669F AD lods dword ptr ds:[esi]
100466A0 8BC8 mov ecx,eax
100466A2 83E9 08 sub ecx,8
100466A5 D1E9 shr ecx,1
100466A7 66:C785 55974000 0>mov word ptr ss:[ebp+409755],0
100466B0 33C0 xor eax,eax
100466B2 66:AD lods word ptr ds:[esi]
100466B4 0BC0 or eax,eax
100466B6 74 49 je short mirrg.10046701
100466B8 66:0385 55974000 add ax,word ptr ss:[ebp+409755]
100466BF 66:8985 55974000 mov word ptr ss:[ebp+409755],ax
100466C6 50 push eax
100466C7 C1E8 0C shr eax,0C
100466CA 83F8 01 cmp eax,1
100466CD 75 0E jnz short mirrg.100466DD
100466CF 58 pop eax
100466D0 25 FF0F0000 and eax,0FFF
100466D5 03C2 add eax,edx
100466D7 66:0158 02 add word ptr ds:[eax+2],bx
100466DB EB 24 jmp short mirrg.10046701
100466DD 83F8 02 cmp eax,2
100466E0 75 0D jnz short mirrg.100466EF
100466E2 58 pop eax
100466E3 25 FF0F0000 and eax,0FFF
100466E8 03C2 add eax,edx
100466EA 66:0118 add word ptr ds:[eax],bx
100466ED EB 12 jmp short mirrg.10046701
100466EF 83F8 03 cmp eax,3
100466F2 75 0C jnz short mirrg.10046700
100466F4 58 pop eax
100466F5 25 FF0F0000 and eax,0FFF
100466FA 03C2 add eax,edx
100466FC 0118 add dword ptr ds:[eax],ebx
100466FE EB 01 jmp short mirrg.10046701
10046700 58 pop eax
10046701 49 dec ecx
10046702 ^ 75 AC jnz short mirrg.100466B0
10046704 ^ EB 8C jmp short mirrg.10046692
10046706 C3 retn
直接在1000D13E下硬件执行断点
1000D13E /. 55 push ebp oep=1000D13E
1000D13F |. 8BEC mov ebp,esp
1000D141 |. 53 push ebx
1000D142 |. 8B5D 08 mov ebx,dword ptr ss:[ebp+8]
1000D145 |. 56 push esi
1000D146 |. 8B75 0C mov esi,dword ptr ss:[ebp+C]
1000D149 |. 57 push edi
1000D14A |. 8B7D 10 mov edi,dword ptr ss:[ebp+10]
1000D14D |. 85F6 test esi,esi
1000D14F |. 75 09 jnz short rdmIR.1000D15A
1000D151 |. 833D 14880310 00 cmp dword ptr ds:[10038814],0
1000D158 |. EB 26 jmp short rdmIR.1000D180
1000D15A |> 83FE 01 cmp esi,1
1000D15D |. 74 05 je short rdmIR.1000D164
再找IAT
10028000 796D1E76 ADVAPI32.RegCloseKey IAT开始地址
10028004 796D3280 ADVAPI32.RegCreateKeyExA
10028008 796D2506 ADVAPI32.RegOpenKeyExA
1002800C 796D33CB ADVAPI32.RegSetValueExA
10028010 00000000
100284C8 00000000
100284CC 77A6C4C5 OLE32.OleFlushClipboard
100284D0 77A6AD73 OLE32.CLSIDFromProgID
100284D4 77A624B1 OLE32.CLSIDFromString
100284D8 77A70679 OLE32.CoGetClassObject
100284DC 77AC67EC OLE32.StgOpenStorageOnILockBytes
100284E0 77A6D0A4 OLE32.StgCreateDocfileOnILockBytes
100284E4 77A6CD3C OLE32.CreateILockBytesOnHGlobal
100284E8 77A46D7B OLE32.CoTaskMemFree
100284EC 77A452F1 OLE32.CoTaskMemAlloc
100284F0 77A60C9C OLE32.OleInitialize
100284F4 77A5E5B3 OLE32.OleUninitialize
100284F8 77A9A5E6 OLE32.CoFreeUnusedLibraries
100284FC 77A5E334 OLE32.CoRegisterMessageFilter
10028500 77A5F3D7 OLE32.CoRevokeClassObject
10028504 77A6BCF4 OLE32.OleIsCurrentClipboard
10028508 00000000
1002850C 7528F48C oledlg.OleUIBusyA IAT结束的地址
在oep处用LordPE dump出来，用peditor的DumpFixer逐一修正区块
ImportREC载入dll，oep=0000D13E rva=00028000 size=50C 修复dump.dll
用WinHex打开dll，复制3D000-403E4另存为新的二进制文件，再用看雪老师的修复工具PEComAngela，得
到还原过重定位表的pediy.bin
用WinHex把pediy.bin写入到dll文件的32000处。
最后用LordPE 修正oep=0000D13E Relocalation的RVA=3D000 SIZE=000033E4
终于DLL_Loader能加载 ，peid0.93显示Microsoft Visual C++ 6.0 DLL
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【破解总结】
再次感谢看雪老师，他的PEComAngela使 PECompact的重定位表修复工作容易很多！
ps：对loveboom近期遭遇深表同情，套用西游记里的话就是“这些人都是路过的妖精，对他们认真不得。”，同时也
希望师傅继续高产势头，多多向我们抛玉！
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【版权声明】 本文纯属技术交流, 转载请注明作者并保持文章的完整, 谢谢!
2005-7-26
附件:mirrg.rar
[招生]科锐逆向工程师培训(2024年11月15日实地，远程教学同时开班, 第51期)
