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最后登录1970-1-1
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下载了一个软件www.fyun168.com下载0901版,安装简单,可以试用30天,发现可以使用注册码,于是找到了授权成功的位置。将74改成75,
随便输入注册码提示成功。确定后软件自动重起较验,又是恢复到未注册,然后又在关键跳转下断点,虽然正确断下,但还是看不到真码,
断点正确。但看只能看到机器码和假码,未找到真码,
、
高手提点一下!是不是这个还要跟几个才能成功。
00405890 /$ 53 push ebx
00405891 |. 85C0 test eax,eax
00405893 |. 74 2D je short F6.004058C2
00405895 |. 8B58 FC mov ebx,dword ptr ds:[eax-0x4]
00405898 |. 85DB test ebx,ebx
0040589A |. 74 26 je short F6.004058C2
0040589C |. 4A dec edx
0040589D |. 7C 1B jl short F6.004058BA
0040589F |. 39DA cmp edx,ebx
004058A1 |. 7D 1F jge short F6.004058C2
004058A3 |> 29D3 sub ebx,edx
004058A5 |. 85C9 test ecx,ecx
004058A7 |. 7C 19 jl short F6.004058C2
004058A9 |. 39D9 cmp ecx,ebx
004058AB |. 7F 11 jg short F6.004058BE
004058AD |> 01C2 add edx,eax
004058AF |. 8B4424 08 mov eax,dword ptr ss:[esp+0x8]
004058B3 |. E8 7CFBFFFF call F6.00405434
004058B8 |. EB 11 jmp short F6.004058CB
004058BA |> 31D2 xor edx,edx
004058BC |.^ EB E5 jmp short F6.004058A3
004058BE |> 89D9 mov ecx,ebx
004058C0 |.^ EB EB jmp short F6.004058AD
004058C2 |> 8B4424 08 mov eax,dword ptr ss:[esp+0x8]
004058C6 |. E8 79FAFFFF call F6.00405344
004058CB |> 5B pop ebx
004058CC \. C2 0400 retn 0x4
004058CF . C3 retn
004058D0 /$ 53 push ebx
004058D1 |. 56 push esi
004058D2 |. 57 push edi
004058D3 |. 89C3 mov ebx,eax
004058D5 |. 89D6 mov esi,edx
004058D7 |. 89CF mov edi,ecx
004058D9 |. E8 A2FFFFFF call F6.00405880
004058DE |. 8B13 mov edx,dword ptr ds:[ebx]
004058E0 |. 85D2 test edx,edx
004058E2 |. 74 30 je short F6.00405914
004058E4 |. 8B4A FC mov ecx,dword ptr ds:[edx-0x4]
004058E7 |. 4E dec esi
004058E8 |. 7C 2A jl short F6.00405914
004058EA |. 39CE cmp esi,ecx
004058EC |. 7D 26 jge short F6.00405914
004058EE |. 85FF test edi,edi
004058F0 |. 7E 22 jle short F6.00405914
004058F2 |. 29F1 sub ecx,esi
004058F4 |. 39CF cmp edi,ecx
004058F6 |. 7E 02 jle short F6.004058FA
004058F8 |. 89CF mov edi,ecx
004058FA |> 29F9 sub ecx,edi
004058FC |. 01F2 add edx,esi
004058FE |. 8D0417 lea eax,dword ptr ds:[edi+edx]
00405901 |. E8 16D6FFFF call F6.00402F1C
00405906 |. 8B13 mov edx,dword ptr ds:[ebx]
00405908 |. 89D8 mov eax,ebx
0040590A |. 8B52 FC mov edx,dword ptr ds:[edx-0x4]
0040590D |. 29FA sub edx,edi
0040590F |. E8 A8000000 call F6.004059BC
00405914 |> 5F pop edi
00405915 |. 5E pop esi
00405916 |. 5B pop ebx
00405917 \. C3 retn
00405918 /$ 85C0 test eax,eax
0040591A |. 74 56 je short F6.00405972
0040591C |. 53 push ebx
0040591D |. 56 push esi
0040591E |. 57 push edi
0040591F |. 55 push ebp
00405920 |. 89C3 mov ebx,eax
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