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Smoke
发表于 2011-11-5 23:49
本帖最后由 Smoke 于 2011-11-5 23:50 编辑
【文章标题】: ZProtect Anti-Hook 脱壳
【文章作者】: Smoke
【作者邮箱】: 97463448@qq.com
【作者QQ号】: 97463448
【软件名称】: Project1.zp.exe
【下载地址】: 附件既是.
【保护方式】: ZProtect
【使用工具】: OllyDbg,LordPE,ImportREC
【操作平台】: Windows Xp Sp3
【作者声明】: 只是感兴趣，没有其他目的。失误之处敬请诸位大侠赐教!
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【详细过程】
ZProtect的IAT保护里有一个anti hook功能，让我们修复起来很麻烦o(︶︿︶)o
我们先用delphi7编译一个无壳程序 然后使用ZProtect1.49进行加壳
加完壳之后 载入我们强悍的工具 OllyDbg 后,找到oep 使用esp定律即可
载入之后显示为如下:004667F6 E8 01000000 call 004667FC
004667FB A8 87 test al, 0x87
004667FD 2C 24 sub al, 0x24
004667FF 8DAD C1FAFFFF lea ebp, dword ptr ss:[ebp-0x53F]
00466805 872C24 xchg dword ptr ss:[esp], ebp
0044E1DC 55 push ebp //下硬件执行断点
0044E1DD 8BEC mov ebp, esp
0044E1DF 83C4 F0 add esp, -0x10
0044E1E2 B8 FCDF4400 mov eax, 0044DFFC
0044E1E7 E8 E480FBFF call 004062D0
0044E1EC A1 1C004500 mov eax, dword ptr ds:[0x45001C]
0044E1F1 8B00 mov eax, dword ptr ds:[eax]
0044E1F3 E8 9CE6FFFF call 0044C894
0044E1F8 8B0D F8004500 mov ecx, dword ptr ds:[0x4500F8]
看到堆栈窗口显示 打开了 Kernel32.dll0012F8F8 00A0DA0D /CALL to CreateFileA from 00A0DA07
0012F8FC 0012FAA8 |FileName = "C:\WINDOWS\system32\kernel32.dll"
0012F900 80000000 |Access = GENERIC_READ
7C809AE1 k> 8BFF mov edi, edi ; kernel32.ReadFile
7C809AE3 55 push ebp
7C809AE4 8BEC mov ebp, esp
7C809AE6 FF75 14 push dword ptr ss:[ebp+0x14]
7C809AE9 FF75 10 push dword ptr ss:[ebp+0x10]
7C809AEC FF75 0C push dword ptr ss:[ebp+0xC]
7C809AEF FF75 08 push dword ptr ss:[ebp+0x8]
7C809AF2 6A FF push -0x1
7C809AF4 E8 09000000 call VirtualAllocEx
7C809AF9 5D pop ebp //F2下断 F9运行
7C809AFA C2 1000 retn 0x10
继续F9一次记录oleaut32.dll 继续F9一次记录version.dll 继续F9一次记录gdi32.dll
继续F9一次记录comctl32.dll
继续F9一次 来到了OEP 代码如下:0044E1DC 55 push ebp
0044E1DD 8BEC mov ebp, esp
0044E1DF 83C4 F0 add esp, -0x10
0044E1E2 B8 FCDF4400 mov eax, 0044DFFC
0044E1E7 E8 E480FBFF call 004062D0
0044E1EC A1 1C004500 mov eax, dword ptr ds:[0x45001C]
0044E1F1 8B00 mov eax, dword ptr ds:[eax]
Dll名 现在的基址 系统函数的基址
Kernel32.dll 00A90000 7C800000
user32.dll 00BB0000 77D10000
advapi32.dll 00C40000 77DA0000
oleaut32.dll 00CF0000 770F0000
version.dll 00D80000 77BD0000
gdi32.dll 00D90000 77EF0000
comctl32.dll 00DE0000 5D170000
IAT起始地址:00452114
IAT结束地址:00452708
var oep
var fi
var tmpesp
var tmp
bc
bphwc
bphws 009E2847 ,"x"
mov oep,eip
mov tmpesp,esp
mov fi,00452114
loop:
mov esp,tmpesp
add fi,4
cmp fi,00452708
jae exit
cmp [fi],0
je loop
mov eip,[fi]
esto
mov tmp,[esp]
cmp tmp,00F6C000
ja fix1
cmp tmp,00DE0000
ja comctl32
cmp tmp,00D90000
ja Gdi32
cmp tmp,00D80000
ja Version
cmp tmp,00CF0000
ja Oleaut32
cmp tmp,00C40000
ja Advapi32
cmp tmp,00BB0000
ja USER32
cmp tmp,00A90000
ja Kernel32
Kernel32:
sub tmp,00A90000
add tmp,7C800000
mov [fi],tmp
jmp loop
USER32:
sub tmp,00BB0000
add tmp,77D10000
mov [fi],tmp
jmp loop
Advapi32:
sub tmp,00C40000
add tmp,77DA0000
mov [fi],tmp
jmp loop
Oleaut32:
sub tmp,00CF0000
add tmp,770F0000
mov [fi],tmp
jmp loop
Version:
sub tmp,00D80000
add tmp,77BD0000
mov [fi],tmp
jmp loop
Gdi32:
sub tmp,00D90000
add tmp,77EF0000
mov [fi],tmp
jmp loop
comctl32:
sub tmp,00DE0000
add tmp,5D170000
mov [fi],tmp
jmp loop
fix1:
mov [fi],tmp
jmp loop
exit:
bphwc
mov eip,oep
mov esp,tmpesp
ret
测试可以正常运行程序.
脚本来自kissy.
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【版权声明】: 本文原创于Smoke, 转载请注明作者并保持文章的完整, 谢谢!
2011年11月05日 23:40:08
anti hook.rar
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发表于 2011-11-6 00:39
