004B2D6B |. FF93 38030000 call dword ptr ds:[ebx+0x338] ; 关键CALL 注册时验证
004B2D8F |. 68 9C2E4B00 push Studio.004B2E9C ; Thank you for registering
004B2DF4 |. 68 C42E4B00 push Studio.004B2EC4 ; |Invalid User Name or Product ID. Please try again.
004B3494 /$ 55 push ebp ; 算法CALL
004B3495 |. 8BEC mov ebp,esp
………………………………………………………………………………………………………省略去中间N多代码
004B34F1 |. E8 CE53F5FF call Studio.004088C4
004B34F6 |. 837D E8 00 cmp dword ptr ss:[ebp-0x18],0x0 ; 判断注册名是否为空
004B34FA |. 0F84 E5000000 je Studio.004B35E5
004B3500 |. 837D F8 00 cmp dword ptr ss:[ebp-0x8],0x0 ; 判断输入的假是否为空
004B3504 |. 0F84 DB000000 je Studio.004B35E5
004B350A |. 8D45 F0 lea eax,dword ptr ss:[ebp-0x10]
004B350D |. BA 38364B00 mov edx,Studio.004B3638 ; life
004B3512 |. E8 1511F5FF call Studio.0040462C
004B3517 |. 8D45 EC lea eax,dword ptr ss:[ebp-0x14] ; (ASCII "86K")
004B351A |. BA 48364B00 mov edx,Studio.004B3648 ; is soft and moody
004B351F |. E8 0811F5FF call Studio.0040462C
004B3524 |. 33C9 xor ecx,ecx
004B3526 |. B2 01 mov dl,0x1
004B3528 |. A1 88E74A00 mov eax,dword ptr ds:[0x4AE788] ; (ASCII "H6K")
004B352D |. E8 42C7FFFF call Studio.004AFC74
004B3532 |. 8BF0 mov esi,eax
004B3534 |. 8B0D 04FD4A00 mov ecx,dword ptr ds:[0x4AFD04] ; Studio.004AFD50
004B353A |. 8B53 38 mov edx,dword ptr ds:[ebx+0x38] ; (ASCII "ldmaigtbsmare")
004B353D |. 8BC6 mov eax,esi
004B353F |. E8 D8DEFEFF call Studio.004A141C
004B3544 |. 8D4D F0 lea ecx,dword ptr ss:[ebp-0x10] ; (ASCII "86K")
004B3547 |. 8B55 E8 mov edx,dword ptr ss:[ebp-0x18]
004B354A |. 8BC6 mov eax,esi
004B354C |. 8B38 mov edi,dword ptr ds:[eax]
004B354E |. FF57 54 call dword ptr ds:[edi+0x54]
004B3551 |. 8BC6 mov eax,esi
004B3553 |. 8B10 mov edx,dword ptr ds:[eax] ; (ASCII "IpWq0V/w6w==")
004B3555 |. FF52 44 call dword ptr ds:[edx+0x44]
004B3558 |. 8BC6 mov eax,esi
004B355A |. E8 4502F5FF call Studio.004037A4
004B355F |. 33C9 xor ecx,ecx
004B3561 |. B2 01 mov dl,0x1
004B3563 |. A1 94304A00 mov eax,dword ptr ds:[0x4A3094] ; ムJ
004B3568 |. E8 FBE2FEFF call Studio.004A1868
004B356D |. 8BF0 mov esi,eax
004B356F |. 8B0D 34414A00 mov ecx,dword ptr ds:[0x4A4134] ; Studio.004A4180
004B3575 |. 8B53 3C mov edx,dword ptr ds:[ebx+0x3C] ; (ASCII "bsstopudioxmil")
004B3578 |. 8BC6 mov eax,esi
004B357A |. E8 9DDEFEFF call Studio.004A141C
004B357F |. 8D4D EC lea ecx,dword ptr ss:[ebp-0x14] ; (ASCII "H6K")入ecx
004B3582 |. 8B55 F8 mov edx,dword ptr ss:[ebp-0x8] ; 假码入edx
004B3585 |. 8BC6 mov eax,esi
004B3587 |. 8B38 mov edi,dword ptr ds:[eax]
004B3589 |. FF57 58 call dword ptr ds:[edi+0x58]
004B358C |. 8BC6 mov eax,esi
004B358E |. 8B10 mov edx,dword ptr ds:[eax]
004B3590 |. FF52 44 call dword ptr ds:[edx+0x44]
004B3593 |. 8BC6 mov eax,esi
004B3595 |. E8 0A02F5FF call Studio.004037A4
004B359A |. 8B45 F0 mov eax,dword ptr ss:[ebp-0x10]
004B359D |. 8B55 EC mov edx,dword ptr ss:[ebp-0x14]
004B35A0 |. E8 EB13F5FF call Studio.00404990 ; 注意al的值
004B35A5 |. 0F94C0 sete al ;爆破点:修改为setne al
004B35A8 8843 34 mov byte ptr ds:[ebx+0x34],al ;全局变量:ebx+0x34
004B35AB 807B 34 00 cmp byte ptr ds:[ebx+0x34],0x0
004B35AF |. 74 34 je short Studio.004B35E5
………………………………………………………………………………………………………省略去中间N多代码
004B3617 . 5F pop edi
004B3618 . 5E pop esi
004B3619 . 5B pop ebx
004B361A . 8BE5 mov esp,ebp
004B361C . 5D pop ebp
004B361D . C2 0400 retn 0x4
004B37AA . 8B45 FC mov eax,dword ptr ss:[ebp-0x4]
004B37AD . 59 pop ecx
004B37AE . E8 E1FCFFFF call Studio.004B3494 ; 启动时调用
004B37B3 . 84C0 test al,al
004B37B5 . 75 08 jnz short Studio.004B37BF
004B37B7 . 8B45 FC mov eax,dword ptr ss:[ebp-0x4]
5、第四中断下后直接F8向下走,返回到如下: 看到这里看软件还可以试用多少天,这不就是软件在之前输入注册信息处的提示吗?
代码
004B31F4 |. 8BC3 mov eax,ebx
004B31F6 |. E8 61040000 call Studio.004B365C
004B31FB 807B 34 00 cmp byte ptr ds:[ebx+0x34],0x0 ; 返回处 全局变量:ebx+0x34再次出现
004B31FF 0F85 9F010000 jnz Studio.004B33A4
………………………………………………………………………………………………………省略去中间N多代码
004B328E |. FF51 08 call dword ptr ds:[ecx+0x8]
004B3291 |. 68 04344B00 push Studio.004B3404 ; Thank you for using
004B3296 |. 8D95 E4FEFFFF lea edx,dword ptr ss:[ebp-0x11C]
………………………………………………………………………………………………………省略去中间N多代码
004B32EC |. 8D85 E0FEFFFF lea eax,dword ptr ss:[ebp-0x120]
004B32F2 |. BA 30344B00 mov edx,Studio.004B3430 ; days remaining.
004B32F7 |. E8 5815F5FF call Studio.00404854
004B32FC |. 8B95 E0FEFFFF mov edx,dword ptr ss:[ebp-0x120]
004B3302 |. 8B86 FC020000 mov eax,dword ptr ds:[esi+0x2FC]
004B3308 |. E8 13C3F8FF call Studio.0043F620
004B330D |. EB 25 jmp short Studio.004B3334
004B330F |> 4F dec edi
004B3310 |. 75 12 jnz short Studio.004B3324
004B3312 |. BA 4C344B00 mov edx,Studio.004B344C ; 1 day remaining.
004B3317 |. 8B86 FC020000 mov eax,dword ptr ds:[esi+0x2FC]
004B331D |. E8 FEC2F8FF call Studio.0043F620
004B3322 |. EB 10 jmp short Studio.004B3334
004B3324 |> BA 68344B00 mov edx,Studio.004B3468 ; 0 days remaining.
004B3329 |. 8B86 FC020000 mov eax,dword ptr ds:[esi+0x2FC]
004B332F |. E8 ECC2F8FF call Studio.0043F620
004B3334 |> 83BB 50020000 0>cmp dword ptr ds:[ebx+0x250],0x0
6、在重启验证的段首下断,重载程序F9运行断下F8向下走在信息窗口可以看到“(ASCII "C:\WINDOWS\system32\winsoap.crc")”注册信息保存在这里用记事本打开可以看到;
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【破解总结】:
1、字符串没加密,容易切入注册验证流程中;
2、写出第五5步的目的是为了提供另一个思路,下取系统时间API断点来切入验证体系,我没试过但觉得这是可以的!
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【版权声明】:
本文原创于geekcat,转载请注明作者并保存文章的完整!