jdpack(铁甲1.01)的脱壳及破解
这是一个加壳软件,软件加壳后可以检测trw及sice,它的1.00版检测到trw或sice时只是提示,到了1.01版,检测到就会出现非法操作.
未注册版好像没有时间限制,但是给软件加壳后每次运行就会提示"Unregistered JDPack.This file PACKED by Unregistered
JDPack1.0* from http://www.tlzj18.com"
使用工具:TRW kWDSM
下载地址(1.00 and
1.01): http://person.longcity.net/home0/flyfancy/jd.rar
脱壳:
我最初追踪的是1.00版,当时软件还只是提示,我就很轻易的找到了关键
bpx getversionexa
g
断下后
先bc(因为以后有几个getversionexa的调用,但是与脱壳无关)
下面会有2个Jz,但是不能让它跳,否则就提示检测到调试器(因为我用的是TRW)
输入 r fl z
之后就是一个jmp
F8继续,后面就很简单了,我只记得快到的时候会有
popa
jmp
eax
然后makepe即可
1.01的脱壳方法也是
bpx getversionexa
g
就到了这里
0187:0040E250 CALL NEAR [EBP+004031B1]
//停在这里,先bc
0187:0040E256 LEA EBX,[EBP+00403449]
0187:0040E25C CMP DWORD [EBX+10],BYTE +01
0187:0040E260 JZ 0040E276
(JUMP)//下 r fl z,跳的话就完了.
0187:0040E262 CMP
DWORD [EBX+10],BYTE +02
0187:0040E266 JZ
0040E26A
0187:0040E268 JMP SHORT 0040E284
//F8进去
0187:0040E284 MOV
EDX,[EBP+00403441] //到了这里
0187:0040E28A
MOV ESI,[EBP+004031D9]
0187:0040E290 ADD
ESI,EDX
0187:0040E292 MOV EAX,[ESI+0C]
0187:0040E295 OR EAX,EAX
0187:0040E297
JZ NEAR 0040E3EA
(NO JUMP) //看到这里吗,就g 40E3EA吧
0187:0040E29D ADD
EAX,EDX
0187:0040E29F MOV [EBP+004031A5],EAX
0187:0040E2A5 MOV EBX,EAX
0187:0040E3EA
MOV EDX,[EBP+00403441]
0187:0040E3F0 MOV
EAX,[EBP+004031D5]
0187:0040E3F6 ADD
EAX,EDX
0187:0040E3F8 MOV [ESP+1C],EAX
0187:0040E3FC
POPA
0187:0040E3FD PUSH EAX
0187:0040E3FE
RET
// 到了这里,按F8就返回程序的OEP处了,直接makepe即可
破解:
破解它可难倒了我,我用kwdsm反汇编后,半天都摸不着头脑
没有办法只有载入已加壳的Notepad.exe跟踪,发现多了一段代码
0187:0040D3EA 6A30 PUSH
BYTE +30 //就是多了这么一段
0187:0040D3EC 8D9D4D324000
LEA EBX,[EBP+0040324D] //
0187:0040D3F2
53 PUSH EBX
//
0187:0040D3F3 8D9D61324000
LEA EBX,[EBP+00403261] //
0187:0040D3F9
53 PUSH EBX
//
0187:0040D3FA 6A00
PUSH BYTE +00
//
0187:0040D3FC FF95D5314000 CALL
NEAR [EBP+004031D5] //这里弹出提示窗口
0187:0040D402 8B9565344000
MOV EDX,[EBP+00403465]
0187:0040D408 8B85ED314000
MOV EAX,[EBP+004031ED]
0187:0040D40E 03C2
ADD EAX,EDX
0187:0040D410
8944241C MOV [ESP+1C],EAX
0187:0040D414 61 POPA
0187:0040D415 50 PUSH
EAX
0187:0040D416 C3
RET
再次使用KWDSM反汇编,找到
* Referenced by a (U)nconditional
or (C)onditional Jump at Addresses:
|:00402BE8(C), :00402E57(C)
|
:00402FAA 6A30
push 00000030 //
:00402FAC 8D9D4D324000 lea ebx,
dword ptr [ebp+0040324D]
:00402FB2 53
push ebx
:00402FB3 8D9D61324000
lea ebx, dword ptr [ebp+00403261]
:00402FB9
53
push ebx
:00402FBA 6A00
push 00000000
:00402FBC FF95D5314000
call dword ptr [ebp+004031D5] //这断和那断多的代码不是一样吗?
:00402FC2 8B9565344000 mov edx,
dword ptr [ebp+00403465]
:00402FC8 8B85ED314000
mov eax, dword ptr [ebp+004031ED]
:00402FCE 03C2
add eax, edx
:00402FD0
8944241C mov dword ptr
[esp+1C], eax
:00402FD4 61
popad
:00402FD5 50
push eax
:00402FD6 C3
ret
于是跳转到402e57
* Referenced by a (U)nconditional or (C)onditional
Jump at Address:
|:00402FA5(U)
|
:00402E52 8B460C
mov eax, dword ptr [esi+0C]
:00402E55 0BC0
or eax, eax
:00402E57 0F844D010000
je 00402FAA //这里改为0F8465010000即可
:00402E5D 03C2
add eax, edx
:00402E5F 8985BD314000
mov dword ptr [ebp+004031BD], eax
:00402E65 8BD8
mov ebx, eax
:00402E67 50
push eax
:00402E68 FF95E4334000 call dword
ptr [ebp+004033E4]
:00402E6E 0BC0
or eax, eax
:00402E70 7555
jne 00402EC7
:00402E72 53
push ebx
:00402E73 FF95E8334000 call dword
ptr [ebp+004033E8]
:00402E79 0BC0
or eax, eax
:00402E7B 754A
jne 00402EC7
:00402E7D FFB5BD314000
push dword ptr [ebp+004031BD]
:00402E83
8D9D06334000 lea ebx, dword ptr [ebp+00403306]
:00402E89 53
push ebx
:00402E8A 8D9D01354000
lea ebx, dword ptr [ebp+00403501]
:00402E90 53
push ebx
:00402E91
FF95D9314000 call dword ptr [ebp+004031D9]
:00402E97 83C40C
add esp, 0000000C
:00402E9A 6A30
push 00000030
:00402E9C 8D9DA8324000
lea ebx, dword ptr [ebp+004032A8]
:00402EA2 53
push ebx
:00402EA3 8D9D01354000 lea ebx,
dword ptr [ebp+00403501]
:00402EA9 53
push ebx
:00402EAA 6A00
push 00000000
:00402EAC
FF95D5314000 call dword ptr [ebp+004031D5]
:00402EB2 83BDDD31400001 cmp dword ptr
[ebp+004031DD], 00000001
:00402EB9 7408
je 00402EC3
:00402EBB 6A00
push 00000000
:00402EBD
FF95C5314000 call dword ptr [ebp+004031C5]
我最终都没有发现可以让它变为注册版的办法,以我肤浅的看法就是作者根本没有提供完整版本,因为我用ResScope打开时就发现连Unregistered都是直接打上去的,哈哈
自己作了个汉化破解版
http://person.longcity.net/home0/flyfancy/cjd.rar
- 标 题：jdpack的脱壳及破解 (5千字)
- 作 者：flyfancy
- 时 间：2002-6-25 20:14:03
- 链 接：http://bbs.pediy.com