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访客4年前 (2021-04-10)黑客工具1052

一.OEP 通常压缩壳加壳的DLL找OEP是比较简单的
DLL卸载时会再次从EP处运行，几个跳转后就会到OEP了 0094BEA0 807C24 08 01 cmp byte ptr ss:[esp 8],1
//进入OllyDBG后暂停在EP
0094BEA5 0F85 7E010000 jnz 0094C029
//这里在DLL卸载时会跳转，就是去OEP的捷径了 0094C029 E9 BE3AFAFF jmp 008EFAEC
//这里就是跳OEP了
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二.输入表 RLPack V1.1X Full Edition加壳exe文件会加密某些输入表，而加壳DLL则很少加密输入表的
BP GetProcAddress
Shift F9，中断后取消断点，Alt F9返回 0094BF57 56 push esi
0094BF58 FF95 E3090000 call near dword ptr ss:[ebp 9E3] ; kernel32.LoadLibraryA
0094BF5E 8985 4E0A0000 mov dword ptr ss:[ebp A4E],eax
0094BF64 85C0 test eax,eax
0094BF66 0F84 C2000000 je 0094C02E
0094BF6C 8BC6 mov eax,esi
0094BF6E EB 5F jmp short 0094BFCF
0094BF70 8B85 520A0000 mov eax,dword ptr ss:[ebp A52]
0094BF76 8B00 mov eax,dword ptr ds:[eax]
0094BF78 A9 00000080 test eax,80000000
0094BF7D 74 14 je short 0094BF93
0094BF7F 35 00000080 xor eax,80000000
0094BF84 50 push eax
0094BF85 8B85 520A0000 mov eax,dword ptr ss:[ebp A52]
0094BF8B C700 20202000 mov dword ptr ds:[eax],202020 ; UNICODE " Hercegovina"
0094BF91 EB 06 jmp short 0094BF99
0094BF93 FFB5 520A0000 push dword ptr ss:[ebp A52]
0094BF99 FFB5 4E0A0000 push dword ptr ss:[ebp A4E]
0094BF9F FF95 E7090000 call near dword ptr ss:[ebp 9E7] ; kernel32.GetProcAddress
0094BFA5 85C0 test eax,eax
//返回这里
0094BFA7 0F84 81000000 je 0094C02E
0094BFAD 8907 mov dword ptr ds:[edi],eax ; ntdll.RtlDeleteCriticalSection
//填充系统函数地址
//EDI=008F3154 注意观察这个地址
0094BFAF 83C7 04 add edi,4
0094BFB2 8B85 520A0000 mov eax,dword ptr ss:[ebp A52]
0094BFB8 EB 01 jmp short 0094BFBB
0094BFBA 40 inc eax
0094BFBB 8038 00 cmp byte ptr ds:[eax],0
0094BFBE 75 FA jnz short 0094BFBA
0094BFC0 40 inc eax
0094BFC1 8985 520A0000 mov dword ptr ss:[ebp A52],eax
0094BFC7 66:8178 02 0080 cmp word ptr ds:[eax 2],8000
0094BFCD 74 A1 je short 0094BF70
0094BFCF 8038 00 cmp byte ptr ds:[eax],0
0094BFD2 75 9C jnz short 0094BF70
0094BFD4 EB 01 jmp short 0094BFD7
0094BFD6 46 inc esi