天然码输入法

加密特点：在比较注册码前，先产生另外的进程调用vxd绕过window api读指纹盘，如果没有指纹盘就不比较注册码。其实这个软件是明码比较不用脱壳的，但对dll脱壳是很多初学者还没掌握的基本技能，所以还是多此一举把trm32.ime的壳脱了。(trm32.ime说穿了就是一个dll)

dll壳脱的难点在于dll是动态加载的(废话!)，所以不能用loader。那么我们只好在dll的entry point加上int 3的指令了。

用peditor装入/windows/system/trm32.ime,可看到entry point = 0003D210;Image Base = 10000000;用peditor的FLC计算entry point(1003d210)的偏移为：00013610。再用二进制编辑器在偏移为00013610处机器码为80H的内容改为CC(即 int 3的机器码)。

现在运行trw2k，下命令“I3HERE ON”，打开任务条的输入法管理器。选天然码，点“属性”将激活trw2k，停在dll的入口处：

017F:1003D210 CC INT3

017F:1003D211 7C24 JL 1003D237 (NO JUMP)

017F:1003D213 0801 OR [ECX],AL

017F:1003D215 0F8581010000 JNZ NEAR 1003D39C

017F:1003D21B 60 PUSHA

017F:1003D21C BE00A00210 MOV ESI,1002A000

“r eip eip-1”，“d eip”，将017F:1003D210处改为80H：

017F:1003D210 807C240801 CMP BYTE [ESP+08],01

017F:1003D215 0F8581010000 JNZ NEAR 1003D39C

017F:1003D21B 60 PUSHA

017F:1003D21C BE00A00210 MOV ESI,1002A000

017F:1003D221 8DBE0070FDFF LEA EDI,[ESI+FFFD7000]

017F:1003D227 57 PUSH EDI

f10跟踪，来到这里：

017F:1003D344 95 XCHG EAX,EBP

017F:1003D345 8A07 MOV AL,[EDI]

017F:1003D347 47 INC EDI 《===EDI为引入的函数名

017F:1003D348 08C0 OR AL,AL

017F:1003D34A 74DC JZ 1003D328

017F:1003D34C 89F9 MOV ECX,EDI

017F:1003D34E 57 PUSH EDI

017F:1003D34F 48 DEC EAX

017F:1003D350 F2AE REPNE SCASB

017F:1003D352 55 PUSH EBP

017F:1003D353 FF9634DA0300 CALL NEAR [ESI+0003DA34] 〈==getprocessaddress

017F:1003D359 09C0 OR EAX,EAX

017F:1003D35B 7407 JZ 1003D364

017F:1003D35D 8903 MOV [EBX],EAX

017F:1003D35F 83C304 ADD EBX,BYTE +04

017F:1003D362 EBE1 JMP SHORT 1003D345

以上代码为恢复引入表。继续f10跟踪，来到这里：

017F:1003D38C EBE2 JMP SHORT 1003D370

017F:1003D38E 240F AND AL,0F

017F:1003D390 C1E010 SHL EAX,10

017F:1003D393 668B07 MOV AX,[EDI]

017F:1003D396 83C702 ADD EDI,BYTE +02

017F:1003D399 EBE2 JMP SHORT 1003D37D

017F:1003D39B 61 POPA 〈====很眼熟吧!

017F:1003D39C E906BBFCFF JMP 10008EA7〈====OEP

所以OEP在10008EA7处。在10008EA7处DUMP出文件。先看一下trm32.ime的IMTE。“MOD32 TRM32.IME”

可看到IMTE 为：xxxxxxxx;“PEDUMP C:/TRM32.DLL xxxxxxxx”。并挂起进程“SUSPEND”。

回到window运行Imprec 1.3。在任务列表选rundll32.exe 点“pick dll”找到trm32.ime。输入OEP(8EA7)

“get Imports”可修复IAT。再“fix dump”。将产生TRM32_.DLL，把它改名为trm32.ime 即可。到此脱壳完成。

用dump出的trm32.ime替换原来的文件。再次运行输入法管理器。选天然码，点“属性”，将弹出MESSAGEBOX说没有指纹盘或disk serial不对。control-n激活trw2k，“pmodule”，“确定”后，回到trw2k：

:00401514 89442410 mov dword ptr [esp+10], eax

:00401518 8B442434 mov eax, dword ptr [esp+34]

:0040151C 50 push eax

:0040151D E88EFCFFFF call 004011B0 〈=====进入

:00401522 8BD8 mov ebx, eax

:00401524 3BDE cmp ebx, esi

:00401526 7528 jne 00401550

:00401528 56 push esi

* Possible StringData Ref from Data Obj ->"DiskSerial"

|

:00401529 68DC704000 push 004070DC

:0040152E B8847F4000 mov eax, 00407F84

* Possible StringData Ref from Data Obj ->"Disk not exists or process failed "

->"!"

|

:00401533 68B8704000 push 004070B8

:00401538 56 push esi

:00401539 89442424 mov dword ptr [esp+24], eax

:0040153D 89442428 mov dword ptr [esp+28], eax

:00401541 89442420 mov dword ptr [esp+20], eax

* Reference To: USER32.MessageBoxA, Ord:01BEh

|

:00401545 FF15C8604000 Call dword ptr [004060C8]

:0040154B E9A1000000 jmp 004015F1

注意这时是在getdiskserial.exe的领空。(也就是说trm32.ime产生getdiskserial.exe进程)。往上看，注意0040151D处的call 004011B0，在此处下断点，再次运行进入“call 004011B0”来到这：

017F:00401439 50 PUSH EAX

017F:0040143A 8D8C2488030000 LEA ECX,[ESP+0388]

017F:00401441 6A04 PUSH BYTE +04

017F:00401443 51 PUSH ECX

017F:00401444 6A00 PUSH BYTE +00

017F:00401446 6A00 PUSH BYTE +00

017F:00401448 6A01 PUSH BYTE +01

017F:0040144A 56 PUSH ESI

017F:0040144B FF1514604000 CALL `KERNEL32!DeviceIoControl` 〈=调用vxd

017F:00401451 56 PUSH ESI

017F:00401452 FF151C604000 CALL `KERNEL32!FindCloseChangeNotification`

017F:00401458 8BB42490130000 MOV ESI,[ESP+1390]

017F:0040145F 8A843484030000 MOV AL,[ESP+ESI+0384]

017F:00401466 84C0 TEST AL,AL 〈==是否有指纹盘或disk serial ?

017F:00401468 744D JZ 004014B7 〈==没有就跳

017F:0040146A 8BC6 MOV EAX,ESI

017F:0040144B处调用diskserial.vxd绝对读磁盘，017F:00401468处是判断。因为没有指纹盘，将此处改为nop;nop;替换getdiskserial.exe(在window的system下)。

再次运行，这次可以来到“属性”窗口，点“确定”可来到注册窗口，我的机器码为123456789012，输入用户名leo_cyl,注册码12121212。下断点hmemcpy,跟踪来到这里：

:10001FC2 8D4C240C lea ecx, dword ptr [esp+0C]

:10001FC6 8D542414 lea edx, dword ptr [esp+14]

:10001FCA 51 push ecx

:10001FCB 8D442434 lea eax, dword ptr [esp+34]

:10001FCF 52 push edx

:10001FD0 50 push eax

:10001FD1 E85A5E0000 call 10007E30

:10001FD6 83C40C add esp, 0000000C

:10001FD9 E822600000 call 10008000 《=====注意

:10001FDE A1ACF90110 mov eax, dword ptr [1001F9AC]

:10001FE3 6A00 push 00000000

:10001FE5 85C0 test eax, eax

:10001FE7 7425 je 1000200E 〈===跳的话就注册失败

:10001FE9 6878F10010 push 1000F178

:10001FEE 686CF10010 push 1000F16C

:10001FF3 56 push esi

* Reference To: user32.MessageBoxA, Ord:01B7h

|

:10001FF4 FF15A0D10010 Call dword ptr [1000D1A0]

:10001FFA 6A01 push 00000001

:10001FFC 56 push esi

* Reference To: user32.EndDialog, Ord:00B9h

|

:10001FFD FF1590D20010 Call dword ptr [1000D290]

:10002003 5F pop edi

:10002004 5E pop esi

:10002005 33C0 xor eax, eax

:10002007 5B pop ebx

:10002008 83C438 add esp, 00000038

:1000200B C21000 ret 0010

进入:10001FD9 处的call 10008000：

。。。。。

。。。。。

:10008038 894C2450 mov dword ptr [esp+50], ecx

:1000803C 89542410 mov dword ptr [esp+10], edx

:10008040 89442420 mov dword ptr [esp+20], eax

:10008044 894C2454 mov dword ptr [esp+54], ecx

:10008048 56 push esi

:10008049 6689542418 mov word ptr [esp+18], dx

:1000804E 6689442428 mov word ptr [esp+28], ax

:10008053 66894C245C mov word ptr [esp+5C], cx

:10008058 57 push edi

:10008059 8854241E mov byte ptr [esp+1E], dl

:1000805D 8844242E mov byte ptr [esp+2E], al

:10008061 884C2462 mov byte ptr [esp+62], cl

:10008065 E826A4FFFF call 10002490 〈======注意此call

:1000806A 8BF8 mov edi, eax

:1000806C 83C9FF or ecx, FFFFFFFF

:1000806F 33C0 xor eax, eax

:10008071 8D542410 lea edx, dword ptr [esp+10]

:10008075 F2 repnz

:10008076 AE scasb

:10008077 F7D1 not ecx

10008065 处的call将调用ShellExecuteA的window api 产生getdiskserial.exe进程。假设刚才没改getdiskserial.exe的话，有两个进程要跟踪，比较麻烦，如果非法用户的话getdiskserial将弹出MESSAGEBOX，注册失败。

继续跟踪来到这里：

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:10008191(C)

|

:1000817D 8A540430 mov dl, byte ptr [esp+eax+30] 〈==这是假注册码

:10008181 8A4C0468 mov cl, byte ptr [esp+eax+68] 〈==正确注册码

:10008185 3AD1 cmp dl, cl

:10008187 0F851BFFFFFF jne 100080A8

:1000818D 40 inc eax

:1000818E 83F809 cmp eax, 00000009

:10008191 7CEA jl 1000817D

:10008193 5F pop edi

:10008194 C705ACF9011001000000 mov dword ptr [1001F9AC], 00000001

:1000819E 5E pop esi

:1000819F 81C480000000 add esp, 00000080

:100081A5 C3 ret

到此pj完成。打了那么多字，好累啊!