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- 42027
注册时间2007-12-19
阅读权限20
最后登录1970-1-1
以武会友
TA的每日心情 | 开心 2022-8-10 19:15 |
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签到天数: 33 天 [LV.5]常住居民I
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首先,PEID查壳,无壳Microsoft Visual C++ 6.0写的
现在,我们运行程序,进行注册。我输入“778877888”
提示“注册失败!”
我用W32ASM载入程序根本就看不到示“注册失败!”的地方
用OD载入程序吧。
查找超级字符串“注册失败!”
0040957C处,我们双击后,来到反汇编窗口
向上找,
004094D0 . E8 FF78020>call SuperSvr.00430DD4
004094D5 . 8B86 84000>mov eax,dword ptr ds:[esi+84]
004094DB . 85C0 test eax,eax
004094DD . 74 07 je short SuperSvr.004094E6
004094DF . 68 A84B460>push SuperSvr.00464BA8
004094E4 . EB 05 jmp short SuperSvr.004094EB
004094E6 > 68 984B460>push SuperSvr.00464B98
004094EB > 8D4C24 70 lea ecx,dword ptr ss:[esp+70]
004094EF . E8 3079020>call SuperSvr.00430E24
004094F4 . 8D4C24 10 lea ecx,dword ptr ss:[esp+10]
004094F8 . E8 8635020>call SuperSvr.0042CA83
004094FD . 83F8 01 cmp eax,1
00409500 . 0F85 80000>jnz SuperSvr.00409586
00409506 . 8D8C24 F40>lea ecx,dword ptr ss:[esp+1F4]
0040950D . 8DBE 80000>lea edi,dword ptr ds:[esi+80]
00409513 . 51 push ecx ;//我在这里下断点
00409514 . 8BCF mov ecx,edi ;// 小窗口中显示edi=00AB5158, (ASCII "HMF")
ecx=0012FBA8
00409516 . E8 B978020>call SuperSvr.00430DD4
0040951B . 8B46 7C mov eax,dword ptr ds:[esi+7C];//显示ds:[00AB5154]=00AB3C78, (ASCII "BB25-6576-AC1D-2300")
eax=00AB5158
0040951E . 8B0F mov ecx,dword ptr ds:[edi];//显示ds:[00AB5158]=00AB3D18, (ASCII "778877888")
ecx=00AB3D0C我输入的假注册码
00409520 . 50 push eax ; /Arg2;//再次显示eax=00AB3C78,
(ASCII "BB25-6576-AC1D-2300")
看来这个"BB25-6576-AC1D-2300"就是我的注册码哈哈!…………
00409521 . 51 push ecx ; |Arg1;//再次显示我的假注册码
00409522 . E8 4F9F000>call SuperSvr.00413476; //现在看右下角的寄存器窗口显示
0012F9AC 00AB3D18 |Arg1 = 00AB3D18 ASCII "778877888"
0012F9B0 00AB3C78 \Arg2 = 00AB3C78 ASCII "BB25-6576-AC1D-2300"
00409527 . 83C4 08 add esp,8
0040952A . 85C0 test eax,eax
0040952C . 75 4A jnz short SuperSvr.00409578
0040952E . 51 push ecx
0040952F . C786 84000>mov dword ptr ds:[esi+84],1
00409539 . 8BCC mov ecx,esp
0040953B . 896424 10 mov dword ptr ss:[esp+10],esp
0040953F . 57 push edi
00409540 . E8 CB74020>call SuperSvr.00430A10
00409545 . 51 push ecx
00409546 . C68424 080>mov byte ptr ss:[esp+208],1
0040954E . 8BCC mov ecx,esp
00409550 . 896424 10 mov dword ptr ss:[esp+10],esp
00409554 . 68 F849460>push SuperSvr.004649F8 ; ASCII "RegCode"
00409559 . E8 AB77020>call SuperSvr.00430D09
0040955E . 8BCE mov ecx,esi ; |
00409560 . C68424 080>mov byte ptr ss:[esp+208],0 ; |
00409568 . E8 D3DEFFF>call SuperSvr.00407440 ; \SuperSvr.00407440
0040956D . 6A 00 push 0
0040956F . 6A 00 push 0
00409571 . 68 844B460>push SuperSvr.00464B84
00409576 . EB 09 jmp short SuperSvr.00409581
00409578 > 6A 00 push 0 ; /Arg3 = 00000000
0040957A . 6A 00 push 0 ; |Arg2 = 00000000
0040957C . 68 784B460>push SuperSvr.00464B78 ; |Arg1 = 00464B78
00409581 > E8 23F8020>call SuperSvr.00438DA9 ; \SuperSvr.00438DA9
重新运行程序进行注册用"BB25-6576-AC1D-2300"好了注册成功!!! |
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