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CoffeeCup Animator7破解记录
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发表于:
2004-10-10 07:26
8721
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CoffeeCup Animator7破解记录
kongfoo/2004.10.9
Delphi程序，启动时NAG 21天试用期，有几个月没调试东西了，今天因为做网站
要用这个软件，于是跟踪了一下。
先对一些有用的API下断，比如CreateFileA，ShowWindow等。
004093E5 E8 D6D8FFFF CALL <JMP.&kernel32.CreateFileA>
0012FD6C 00C10860 |FileName = "D:\WINXP\System32\WinSys16.crc"
0012FD70 80000000 |Access = GENERIC_READ
0012FD74 00000000 |ShareMode = 0
0012FD78 00000000 |pSecurity = NULL
0012FD7C 00000003 |Mode = OPEN_EXISTING
0012FD80 00000080 |Attributes = NORMAL
0012FD84 00000000 \hTemplateFile = NULL
CreateFileA之后跟一下：
005ABE94 55 PUSH EBP
005ABE95 8BEC MOV EBP,ESP
005ABE97 83C4 EC ADD ESP,-14
005ABE9A 53 PUSH EBX
005ABE9B 56 PUSH ESI
005ABE9C 57 PUSH EDI
005ABE9D 33C0 XOR EAX,EAX
005ABE9F 8945 EC MOV DWORD PTR SS:[EBP-14],EAX
005ABEA2 33C0 XOR EAX,EAX
005ABEA4 55 PUSH EBP
005ABEA5 68 99C05A00 PUSH Animator.005AC099
005ABEAA 64:FF30 PUSH DWORD PTR FS:[EAX]
005ABEAD 64:8920 MOV DWORD PTR FS:[EAX],ESP
005ABEB0 E8 4BEEE5FF CALL Animator.0040AD00
005ABEB5 DD1D E8845D00 FSTP QWORD PTR DS:[5D84E8] ==当前时间值->5d84e8
005ABEF5 8B4D EC MOV ECX,DWORD PTR SS:[EBP-14]
005ABEF8 B2 01 MOV DL,1
005ABEFA A1 40AC4100 MOV EAX,DWORD PTR DS:[41AC40]
005ABEFF E8 243EE7FF CALL Animator.0041FD28 ==读文件（%system32%\winsys16.crc）
005ABFF3 E8 08EDE5FF CALL Animator.0040AD00
005ABFF8 DC25 E8845D00 FSUB QWORD PTR DS:[5D84E8] ==当前时间值减去%system32%\winsys16.crc的时间值
005ABFFE DD5D F0 FSTP QWORD PTR SS:[EBP-10]
005AC01E 6A 00 PUSH 0
005AC020 6A 18 PUSH 18 ==24
005AC022 6A 00 PUSH 0
005AC024 6A 3C PUSH 3C ==60
005AC026 6A 00 PUSH 0
005AC028 6A 3C PUSH 3C ==将时间值转换成天数
005AC02A D905 A8C05A00 FLD DWORD PTR DS:[5AC0A8]
005AC030 DC4D F0 FMUL QWORD PTR SS:[EBP-10]
005AC033 D835 ACC05A00 FDIV DWORD PTR DS:[5AC0AC]
005AC039 E8 226BE5FF CALL Animator.00402B60
005AC03E E8 5996E5FF CALL Animator.0040569C
005AC043 E8 5496E5FF CALL Animator.0040569C
005AC048 E8 4F96E5FF CALL Animator.0040569C
005AC04D A3 E0845D00 MOV DWORD PTR DS:[5D84E0],EAX ==eax就是使用过的天数了
005AC052 833D E0845D00 1>CMP DWORD PTR DS:[5D84E0],16 ==和22比较
005AC059 7C 09 JL SHORT Animator.005AC064
005AC05B C605 E4845D00 0>MOV BYTE PTR DS:[5D84E4],1 ==大于21就设置过期标志了
005AC062 EB 07 JMP SHORT Animator.005AC06B
启动时过期限制的爆破点很简单，把5ac059的jl改成jmp就可以了。
顺便把NAG去除掉，拿出利器dede，输出dpr：
begin
{
005BC20C 55 push ebp
005BC20D 8BEC mov ebp, esp
005BC20F 83C4F0 add esp, -$10
005BC212 B8FCBC5B00 mov eax, $005BBCFC
* Reference to: SysInit.@InitExe(Pointer);
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005BC217 E804A9E4FF call 00406B20
* Reference to TApplication instance
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005BC21C A1E8BE5C00 mov eax, dword ptr [$005CBEE8]
005BC221 8B00 mov eax, [eax]
* Reference to: Forms.TApplication.Initialize(TApplication);
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005BC223 E82821EBFF call 0046E350
* Reference to TApplication instance
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005BC228 A1E8BE5C00 mov eax, dword ptr [$005CBEE8]
005BC22D 8B00 mov eax, [eax]
* Possible String Reference to: 'CoffeeCup GIF Animator'
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005BC22F BA7CC25B00 mov edx, $005BC27C
* Reference to: Forms.TApplication.SetTitle(TApplication;AnsiString);
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005BC234 E8231DEBFF call 0046DF5C
* Reference to: SplashForm.Proc_005AC90C ==把这个nop掉就可以去掉NAG了，顺便做一下优化，在上面的5bc22f改成jmp 5BC248就OK了
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005BC239 E8CE06FFFF call 005AC90C
* Reference to pointer to GlobalVar_005D8508
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005BC23E A1D4BE5C00 mov eax, dword ptr [$005CBED4]
005BC243 803800 cmp byte ptr [eax], $00
005BC246 7524 jnz 005BC26C
* Reference to TfrmGifMain instance
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005BC248 8B0DCCBF5C00 mov ecx, [$005CBFCC]
* Reference to TApplication instance
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005BC24E A1E8BE5C00 mov eax, dword ptr [$005CBEE8]
005BC253 8B00 mov eax, [eax]
* Reference to class TfrmGifMain
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005BC255 8B15184A5B00 mov edx, [$005B4A18]
* Reference to: Forms.TApplication.CreateForm(TApplication;TComponentClass;void;void);
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005BC25B E80821EBFF call 0046E368
* Reference to TApplication instance
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005BC260 A1E8BE5C00 mov eax, dword ptr [$005CBEE8]
005BC265 8B00 mov eax, [eax]
* Reference to: Forms.TApplication.Run(TApplication);
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005BC267 E87C21EBFF call 0046E3E8
* Reference to: System.@Halt0;
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005BC26C E89F81E4FF call 00404410
5bc22f eb 17 90 90 90 (物理地址：1bb62f)
去掉NAG窗体之后上面的日期检查也省了（没调用检查代码），呵呵。
但还有2个地方要改，一是入主界面时有个对话框，退出前也有个对话框。
再用dede和od分析一下，很快发现关键。
FormActivate 地址：5b5468
005B5468 80B8 11040000 00 CMP BYTE PTR DS:[EAX+411],0
005B546F 75 0C JNZ SHORT Animator.005B547D ==改成jmp就去掉启动时的对话框了（物理地址1b486f）
005B5471 C680 11040000 01 MOV BYTE PTR DS:[EAX+411],1
005B5478 E8 7BE1FFFF CALL Animator.005B35F8
005B547D C3 RETN
看看dede里面的说明，一目了然嘛：
* Reference to : TfrmStartNotice.Proc_005B35F8()
| ^^^^^^^
005B5478 E87BE1FFFF call 005B35F8
退出的NAG：
005B54C0 B201 mov dl, $01 ==改成mov dl,0就不生成NAG啦
* Reference to class TfrmBackSplash ==很明显，对不对:)
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005B54C2 A1A82D5B00 mov eax, dword ptr [$005B2DA8]
* Reference to: Forms.TCustomForm.Create(TCustomForm;boolean;TComponent); ==有dede，delphi程序很好玩:)
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005B54C7 E8C017EBFF call 00466C8C
这个FormClose整个函数就是生成一个NAG，把入口处直接改成retn就成了:)
005B5480 53 PUSH EBX ==改成retn（物理地址1b4880）
005B5481 8BD8 MOV EBX,EAX
005B5483 B2 01 MOV DL,1
005B5485 8BC3 MOV EAX,EBX
005B5487 E8 50310000 CALL Animator.005B85DC
005B548C A1 30BD5C00 MOV EAX,DWORD PTR DS:[5CBD30]
005B5491 8338 00 CMP DWORD PTR DS:[EAX],0
005B5494 74 15 JE SHORT Animator.005B54AB
005B5496 A1 30BD5C00 MOV EAX,DWORD PTR DS:[5CBD30]
005B549B 8B00 MOV EAX,DWORD PTR DS:[EAX]
005B549D E8 BE5AEBFF CALL Animator.0046AF60
005B54A2 A1 30BD5C00 MOV EAX,DWORD PTR DS:[5CBD30]
收工，顺便做个补丁:)
附件:a7patch.rar
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