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[原创][PYG]2007年度认证CrackMe的算法分析(易语言版)
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发表于: 2007-12-29 14:01 7651
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【文章标题】: [PYG]2007年度认证CrackMe的算法分析(易语言版)
【文章作者】: aCaFeeL[DCG][OCN][PYG]
【软件名称】: [PYG]CrackMe2007.EXE
【软件大小】: 241 KB (247,021 字节)
【下载地址】: http://bbs.chinapyg.com/
【加壳方式】: NsPacK V3.7
【保护方式】: 压缩加壳
【编写语言】: delphi
【使用工具】: OllyDBG v1.10、C32Asm v0.412、DeDe v3.5、W32Dasm v8.93、ImportREC v1.6f、LordPE v1.4、PEid v0.94、Filemon v7.01
【操作平台】: Windows 98 second 或者 Windows XP sp2
【软件介绍】: [PYG]2007年度成员认证CrackMe程序
【作者声明】: 只是感兴趣,没有其他目的。失误之处敬请诸位大侠赐教!
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【详细过程】
简单说下注册流程:
Form1.OnCreat事件: 检测文件自身的大小、名称,生成机器码,检测key文件,其格式成功、长度相等便成功读入,将读入的注册名运算
后与读入的注册码比较,如数据相等,则Button1按钮也就可用了;
Timer2.Timer 事件: 再次检测文件大小、检测key文件,成功才会启用Button1按钮,否则是Button1_a假注册按钮;
Button1.Click事件: 将Email的字符串运算之后,连接注册名,再次运算后,得到大数运算需要的KEY,大数运算后得到注册码的第一部份
数据,然后将机器码作浮点实数运算,结果转换为字符串后成为注册码的第二部分数据;
Edit4.Change 事件: 重复Button1.Click事件的前面,然后将MD5加密后的真、假注册码比较,相同,再比较尾部是否为字符串"PYG2007",
相等,便启动Timer1.Timer事件;
Timer1.Timer 事件: 将Email的字符串运算后连接注册名,再次运算后,得到大数运算需要的KEY。。。后面雷同,省略了。
具体分析过程,如下:
CrackMe用了NsPacK V3.7压缩,将其脱壳后,在窗口启动时下断点,得到与注册相关的信息如下:
》》》》》》
004747B9 . 64:FF30 push dword ptr fs:[eax] ; 窗口创建时:
004747BC . 64:8920 mov dword ptr fs:[eax], esp
004747BF . E8 3811FEFF call [PYG]Cra.004558FC
004747C4 . 8D45 F4 lea eax, dword ptr [ebp-C]
004747C7 . BA E04C4700 mov edx, [PYG]Cra.00474CE0 ; [PYG]CrackMe2007.EXE
004747CC . E8 93FDF8FF call [PYG]Cra.00404564
004747D1 . 8D95 18FEFFFF lea edx, dword ptr [ebp-1E8]
004747D7 . A1 0C934700 mov eax, dword ptr [47930C]
004747DC . 8B00 mov eax, dword ptr [eax]
004747DE . E8 E9FDFDFF call [PYG]Cra.004545CC
004747E3 . 8B85 18FEFFFF mov eax, dword ptr [ebp-1E8](TApplication):AnsiString
004747E9 . E8 360EFEFF call [PYG]Cra.00455624
004747EE . 8BD8 mov ebx, eax
004747F0 . E8 0711FEFF call [PYG]Cra.004558FC
004747F5 . EB 01 jmp short [PYG]Cra.004747F8
004747F7 0F db 0F
004747F8 > 31F0 xor eax, esi
004747FA . EB 0C jmp short [PYG]Cra.00474808
004747FC > 33C8 xor ecx, eax
004747FE . EB 03 jmp short [PYG]Cra.00474803
00474800 > EB 09 jmp short [PYG]Cra.0047480B
00474802 0F db 0F
00474803 > 59 pop ecx
00474804 . 74 05 je short [PYG]Cra.0047480B
00474806 .^ 75 F8 jnz short [PYG]Cra.00474800
00474808 > 51 push ecx
00474809 .^ EB F1 jmp short [PYG]Cra.004747FC
0047480B > 81FB C0450400 cmp ebx, 445C0 ; 比较文件大小 与 280000
00474811 7F 39 jg short [PYG]Cra.0047484C ; 小于或等于,则不跳,表示没有被脱壳
00474813 . 8D95 14FEFFFF lea edx, dword ptr [ebp-1EC]
00474819 . A1 0C934700 mov eax, dword ptr [47930C]
0047481E . 8B00 mov eax, dword ptr [eax]
00474820 . E8 A7FDFDFF call [PYG]Cra.004545CC ; 得到程序名称
00474825 . 8B85 14FEFFFF mov eax, dword ptr [ebp-1EC]
0047482B . 50 push eax
0047482C . 8D95 10FEFFFF lea edx, dword ptr [ebp-1F0]
00474832 . 8B45 F4 mov eax, dword ptr [ebp-C]
00474835 . E8 8228FEFF call [PYG]Cra.004570BC ; Base64解密
0047483A . 8B95 10FEFFFF mov edx, dword ptr [ebp-1F0] ; 界密结果: "[PYG]CrackMe2007.EXE"
00474840 . 58 pop eax
00474841 . E8 9200F9FF call [PYG]Cra.004048D8 ; 比较文件名称
00474846 0F84 CA000000 je [PYG]Cra.00474916 ; 相等,则跳!
0047484C > 8B45 FC mov eax, dword ptr [ebp-4]
0047484F . 8B80 14030000 mov eax, dword ptr [eax+314] ; TButton1
00474855 . 33D2 xor edx, edx
00474857 . E8 A0FBFBFF call [PYG]Cra.004343FC ;Controls.TControl.SetVisible(TControl;Boolean)
0047485C . 8B45 FC mov eax, dword ptr [ebp-4]
0047485F . 8B80 14030000 mov eax, dword ptr [eax+314] ; TButton1
00474865 . 33D2 xor edx, edx
00474867 . 8B08 mov ecx, dword ptr [eax]
00474869 . FF51 64 call dword ptr [ecx+64]
0047486C . 8B45 FC mov eax, dword ptr [ebp-4]
0047486F . 8B80 30030000 mov eax, dword ptr [eax+330] ; TButton1_a
00474875 . B2 01 mov dl, 1
00474877 . 8B08 mov ecx, dword ptr [eax]
00474879 . FF51 64 call dword ptr [ecx+64]
0047487C . 8B45 FC mov eax, dword ptr [ebp-4]
0047487F . 8B80 30030000 mov eax, dword ptr [eax+330] ; TButton1_a
00474885 . B2 01 mov dl, 1
00474887 . E8 70FBFBFF call [PYG]Cra.004343FC ;Controls.TControl.SetVisible(TControl;Boolean)
0047488C . 8B45 FC mov eax, dword ptr [ebp-4]
0047488F . 8B80 00030000 mov eax, dword ptr [eax+300] ; TEdit2
00474895 . 33D2 xor edx, edx
00474897 . E8 A48AFBFF call [PYG]Cra.0042D340 ; StdCtrls.TCustomEdit.SetReadOnly
0047489C . E8 170FFEFF call [PYG]Cra.004557B8 ; TApplication._PROC_004557B8()
004748A1 . 33C0 xor eax, eax
004748A3 . 55 push ebp
004748A4 . 68 F4484700 push [PYG]Cra.004748F4
004748A9 . 64:FF30 push dword ptr fs:[eax] ; ***** TRY
004748AC . 64:8920 mov dword ptr fs:[eax], esp
004748AF . B8 084D4700 mov eax, [PYG]Cra.00474D08 ; c:\
004748B4 . E8 E30CFEFF call [PYG]Cra.0045559C
004748B9 . 69C0 39300000 imul eax, eax, 3039
004748BF . 05 2770430B add eax, 0B437027
004748C4 . 33D2 xor edx, edx
004748C6 . 52 push edx ; /Arg2 => 00000000
004748C7 . 50 push eax ; |Arg1
004748C8 . 8D85 0CFEFFFF lea eax, dword ptr [ebp-1F4] ; |
004748CE . E8 B93EF9FF call [PYG]Cra.0040878C ; \[PYG]Cra.0040878C
004748D3 . 8B95 0CFEFFFF mov edx, dword ptr [ebp-1F4]
004748D9 . 8B45 FC mov eax, dword ptr [ebp-4]
004748DC . 8B80 FC020000 mov eax, dword ptr [eax+2FC] ; TEdit1
004748E2 . E8 25FCFBFF call [PYG]Cra.0043450C ;Controls.TControl.SetText(TControl;TCaption)
004748E7 . 33C0 xor eax, eax
004748E9 . 5A pop edx
004748EA . 59 pop ecx
004748EB . 59 pop ecx
004748EC . 64:8910 mov dword ptr fs:[eax], edx
004748EF . E9 9E030000 jmp [PYG]Cra.00474C92
004748F4 .^ E9 23F3F8FF jmp [PYG]Cra.00403C1C
004748F9 . 8B45 FC mov eax, dword ptr [ebp-4]
004748FC . 8B80 FC020000 mov eax, dword ptr [eax+2FC] ; TEdit1
00474902 . BA 144D4700 mov edx, [PYG]Cra.00474D14 ; 123456789
00474907 . E8 00FCFBFF call [PYG]Cra.0043450C
0047490C . E8 73F6F8FF call [PYG]Cra.00403F84
00474911 . E9 7C030000 jmp [PYG]Cra.00474C92
00474916 > EB 01 jmp short [PYG]Cra.00474919 ; 检测正确,跳来了这里
00474918 0F db 0F
00474919 > 31F0 xor eax, esi
0047491B . EB 0C jmp short [PYG]Cra.00474929
0047491D > 33C8 xor ecx, eax
0047491F . EB 03 jmp short [PYG]Cra.00474924
00474921 > EB 09 jmp short [PYG]Cra.0047492C
00474923 0F db 0F
00474924 > 59 pop ecx
00474925 . 74 05 je short [PYG]Cra.0047492C
00474927 .^ 75 F8 jnz short [PYG]Cra.00474921
00474929 > 51 push ecx
0047492A .^ EB F1 jmp short [PYG]Cra.0047491D
0047492C > E8 770FFEFF call [PYG]Cra.004558A8 ; CreateFileA -> 打开Key文件
00474931 . E8 820EFEFF call [PYG]Cra.004557B8 ; TApplication._PROC_004557B8()
00474936 . 33C0 xor eax, eax
00474938 . 55 push ebp
00474939 . 68 86494700 push [PYG]Cra.00474986
0047493E . 64:FF30 push dword ptr fs:[eax] ; ***** TRY
00474941 . 64:8920 mov dword ptr fs:[eax], esp
00474944 . B8 084D4700 mov eax, [PYG]Cra.00474D08 ; c:\
00474949 . E8 4E0CFEFF call [PYG]Cra.0045559C ; 得到C:\下的卷标号
0047494E . 69C0 39300000 imul eax, eax, 3039 ; 卷标号与$3039 相乘 -> eax
00474954 . 05 2770430B add eax, 0B437027 ; 其结果 + $0B437027 -> eax
00474959 . 33D2 xor edx, edx
0047495B . 52 push edx ; /Arg2 => 00000000
0047495C . 50 push eax ; |Arg1
0047495D . 8D85 08FEFFFF lea eax, dword ptr [ebp-1F8] ; |
00474963 . E8 243EF9FF call [PYG]Cra.0040878C ; \[将上面的结果转换为无符号数字(即:机器码)
00474968 . 8B95 08FEFFFF mov edx, dword ptr [ebp-1F8] ; 结果 -》 eax
0047496E . 8B45 FC mov eax, dword ptr [ebp-4]
00474971 . 8B80 FC020000 mov eax, dword ptr [eax+2FC] ; TEdit1
00474977 . E8 90FBFBFF call [PYG]Cra.0043450C ;Controls.TControl.SetText(TControl;TCaption)
0047497C . 33C0 xor eax, eax
0047497E . 5A pop edx
0047497F . 59 pop ecx
00474980 . 59 pop ecx
00474981 . 64:8910 mov dword ptr fs:[eax], edx
00474984 . EB 1D jmp short [PYG]Cra.004749A3
00474986 .^ E9 91F2F8FF jmp [PYG]Cra.00403C1C
0047498B . 8B45 FC mov eax, dword ptr [ebp-4]
0047498E . 8B80 FC020000 mov eax, dword ptr [eax+2FC]
00474994 . BA 144D4700 mov edx, [PYG]Cra.00474D14 ; 123456789
00474999 . E8 6EFBFBFF call [PYG]Cra.0043450C
0047499E . E8 E1F5F8FF call [PYG]Cra.00403F84
004749A3 > E8 100EFEFF call [PYG]Cra.004557B8
004749A8 . 8D4D F8 lea ecx, dword ptr [ebp-8]
004749AB . 33D2 xor edx, edx
004749AD . B8 284D4700 mov eax, [PYG]Cra.00474D28 ; tR^A+.-%=tpc*
004749B2 . E8 0D0DFEFF call [PYG]Cra.004556C4 ; 解密后:oJG_4207.dau=
004749B7 . E8 FC0DFEFF call [PYG]Cra.004557B8
004749BC . 8D4D F8 lea ecx, dword ptr [ebp-8]
004749BF . 33D2 xor edx, edx
004749C1 . B8 404D4700 mov eax, [PYG]Cra.00474D40 ; thg^%#()_=3WD
004749C6 . E8 F90CFEFF call [PYG]Cra.004556C4 ; 解密后:op~@:?5;L-"AS
004749CB . E8 E80DFEFF call [PYG]Cra.004557B8
004749D0 . 8D4D F8 lea ecx, dword ptr [ebp-8]
004749D3 . 33D2 xor edx, edx
004749D5 . B8 584D4700 mov eax, [PYG]Cra.00474D58 ; FDS_^&$#@@~~_
004749DA . E8 E50CFEFF call [PYG]Cra.004556C4 ; 解密后:]\JAA:91SPohH
004749DF . E8 D40DFEFF call [PYG]Cra.004557B8
004749E4 . 8D4D F8 lea ecx, dword ptr [ebp-8]
004749E7 . 33D2 xor edx, edx
004749E9 . B8 704D4700 mov eax, [PYG]Cra.00474D70 ; TV%B^&()_+#$%
004749EE . E8 D10CFEFF call [PYG]Cra.004556C4 ; 解密后:ON<\A:5;L;222
004749F3 . E8 C00DFEFF call [PYG]Cra.004557B8 ; (最初的 CPU 选择)
004749F8 . 8D4D F8 lea ecx, dword ptr [ebp-8]
004749FB . 33D2 xor edx, edx
004749FD . B8 884D4700 mov eax, [PYG]Cra.00474D88 ; 2-atr^%hGIj-%
00474A02 . E8 BD0CFEFF call [PYG]Cra.004556C4 ; 解密后:)5xjmB8zTY{;2
00474A07 . E8 AC0DFEFF call [PYG]Cra.004557B8
00474A0C . EB 01 jmp short [PYG]Cra.00474A0F
00474A0E 0F db 0F
00474A0F > 31F0 xor eax, esi
00474A11 . EB 0C jmp short [PYG]Cra.00474A1F
00474A13 > 33C8 xor ecx, eax
00474A15 . EB 03 jmp short [PYG]Cra.00474A1A
00474A17 > EB 09 jmp short [PYG]Cra.00474A22
00474A19 0F db 0F
00474A1A > 59 pop ecx
00474A1B . 74 05 je short [PYG]Cra.00474A22
00474A1D .^ 75 F8 jnz short [PYG]Cra.00474A17
00474A1F > 51 push ecx
00474A20 .^ EB F1 jmp short [PYG]Cra.00474A13
00474A22 > 8D4D F8 lea ecx, dword ptr [ebp-8]
00474A25 . BA 01000000 mov edx, 1
00474A2A . B8 A04D4700 mov eax, [PYG]Cra.00474DA0 ; KA^A-,-%=tpb-
00474A2F . E8 900CFEFF call [PYG]Cra.004556C4 ; 解密后:PYG_2007.dat:
00474A34 . E8 7F0DFEFF call [PYG]Cra.004557B8
00474A39 . 8D95 00FEFFFF lea edx, dword ptr [ebp-200]
00474A3F . 33C0 xor eax, eax
00474A41 . E8 DEDFF8FF call [PYG]Cra.00402A24
00474A46 . 8B85 00FEFFFF mov eax, dword ptr [ebp-200]
00474A4C . 8D95 04FEFFFF lea edx, dword ptr [ebp-1FC]
00474A52 . E8 9142F9FF call [PYG]Cra.00408CE8
00474A57 . 8D85 04FEFFFF lea eax, dword ptr [ebp-1FC]
00474A5D . 8B55 F8 mov edx, dword ptr [ebp-8] ; KEy文件名称 -》 edx
00474A60 . E8 2FFDF8FF call [PYG]Cra.00404794
00474A65 . 8B85 04FEFFFF mov eax, dword ptr [ebp-1FC]
00474A6B . E8 B40BFEFF call [PYG]Cra.00455624
00474A70 . 8BD8 mov ebx, eax
00474A72 . E8 410DFEFF call [PYG]Cra.004557B8
00474A77 . 83FB FF cmp ebx, -1
00474A7A . 0F84 A2010000 je [PYG]Cra.00474C22 ; 如为空,则跳走
00474A80 . 83FB 20 cmp ebx, 20 ; 长度是否为: 32
00474A83 . 0F85 99010000 jnz [PYG]Cra.00474C22 ; 不相等,也跳走
00474A89 . 8D95 F8FDFFFF lea edx, dword ptr [ebp-208]
00474A8F . 33C0 xor eax, eax
00474A91 . E8 8EDFF8FF call [PYG]Cra.00402A24
00474A96 . 8B85 F8FDFFFF mov eax, dword ptr [ebp-208]
00474A9C . 8D95 FCFDFFFF lea edx, dword ptr [ebp-204]
00474AA2 . E8 4142F9FF call [PYG]Cra.00408CE8
00474AA7 . 8D85 FCFDFFFF lea eax, dword ptr [ebp-204]
00474AAD . 8B55 F8 mov edx, dword ptr [ebp-8]
00474AB0 . E8 DFFCF8FF call [PYG]Cra.00404794
00474AB5 . 8B95 FCFDFFFF mov edx, dword ptr [ebp-204]
00474ABB . 8D85 1CFEFFFF lea eax, dword ptr [ebp-1E4]
00474AC1 . E8 DEE2F8FF call [PYG]Cra.00402DA4
00474AC6 . 8D85 1CFEFFFF lea eax, dword ptr [ebp-1E4]
00474ACC . E8 6FE0F8FF call [PYG]Cra.00402B40
00474AD1 . E8 8EDDF8FF call [PYG]Cra.00402864
00474AD6 . 8D55 F0 lea edx, dword ptr [ebp-10]
00474AD9 . 8D85 1CFEFFFF lea eax, dword ptr [ebp-1E4]
00474ADF . E8 38E6F8FF call [PYG]Cra.0040311C
00474AE4 . 8D85 1CFEFFFF lea eax, dword ptr [ebp-1E4]
00474AEA . E8 99E6F8FF call [PYG]Cra.00403188
00474AEF . E8 70DDF8FF call [PYG]Cra.00402864
00474AF4 . 8D85 1CFEFFFF lea eax, dword ptr [ebp-1E4]
00474AFA . E8 61E3F8FF call [PYG]Cra.00402E60
00474AFF . E8 60DDF8FF call [PYG]Cra.00402864
00474B04 . 8D4D E8 lea ecx, dword ptr [ebp-18]
00474B07 . BA 10000000 mov edx, 10
00474B0C . 8B45 F0 mov eax, dword ptr [ebp-10]
00474B0F . E8 3453FBFF call [PYG]Cra.00429E48
00474B14 . 33DB xor ebx, ebx
00474B16 . B8 01000000 mov eax, 1 ; 循环初时计算KEY文件中的前16位
00474B1B > 8B55 F0 mov edx, dword ptr [ebp-10]
00474B1E . 0FB65402 FF movzx edx, byte ptr [edx+eax-1]
00474B23 . 83EA 0F sub edx, 0F ; 减去F
00474B26 . 83F2 20 xor edx, 20 ; xor 20
00474B29 . 03DA add ebx, edx ; ebx := ebx + edx;
00474B2B . 40 inc eax
00474B2C . 83F8 11 cmp eax, 11 ; 十进制:17
00474B2F .^ 75 EA jnz short [PYG]Cra.00474B1B ; 小于17
00474B31 . 66:9C pushfw
00474B33 . 6A 0A push 0A
00474B35 > E8 02000000 call [PYG]Cra.00474B3C
00474B3A .^ 73 F9 jnb short [PYG]Cra.00474B35
00474B3C $ 83C4 04 add esp, 4
00474B3F . FF0C24 dec dword ptr [esp]
00474B42 .^ 79 F1 jns short [PYG]Cra.00474B35
00474B44 . 83C4 04 add esp, 4
00474B47 . 66:9D popfw
00474B49 . 69C3 697A0000 imul eax, ebx, 7A69 ; 整数乘法 x $7A69
00474B4F . 8BD8 mov ebx, eax
00474B51 . 8D85 F4FDFFFF lea eax, dword ptr [ebp-20C]
00474B57 . 50 push eax ; /Arg1
00474B58 . 899D ECFDFFFF mov dword ptr [ebp-214], ebx ; |
00474B5E . C685 F0FDFFFF 00 mov byte ptr [ebp-210], 0 ; |
00474B65 . 8D95 ECFDFFFF lea edx, dword ptr [ebp-214] ; |
00474B6B . 33C9 xor ecx, ecx ; |
00474B6D . B8 B84D4700 mov eax, [PYG]Cra.00474DB8 ; |%0x
00474B72 . E8 B149F9FF call [PYG]Cra.00409528 ; \[将上面的结果转换成字符串
00474B77 . 8B85 F4FDFFFF mov eax, dword ptr [ebp-20C] ; 字符串 -> eax 中
00474B7D . 8D55 EC lea edx, dword ptr [ebp-14]
00474B80 . E8 CB37F9FF call [PYG]Cra.00408350
00474B85 . 66:9C pushfw
00474B87 . 6A 0A push 0A
00474B89 > E8 02000000 call [PYG]Cra.00474B90
00474B8E .^ 73 F9 jnb short [PYG]Cra.00474B89
00474B90 $ 83C4 04 add esp, 4
00474B93 . FF0C24 dec dword ptr [esp]
00474B96 .^ 79 F1 jns short [PYG]Cra.00474B89
00474B98 . 83C4 04 add esp, 4
00474B9B . 66:9D popfw
00474B9D . 8D95 E8FDFFFF lea edx, dword ptr [ebp-218]
00474BA3 . 8B45 E8 mov eax, dword ptr [ebp-18] ; 取后面的16个字符串
00474BA6 . E8 F539F9FF call [PYG]Cra.004085A0 ; 返回一个删除了空制字符和空格的结果字符串
00474BAB . 8B85 E8FDFFFF mov eax, dword ptr [ebp-218] ; -》 eax
00474BB1 . 8B55 EC mov edx, dword ptr [ebp-14] ; 前16位数的运算结果
00474BB4 . E8 1FFDF8FF call [PYG]Cra.004048D8 ; 比较两字符串 是否 相等?
00474BB9 . 0F85 D3000000 jnz [PYG]Cra.00474C92 ; 不相等,便跳走!
00474BBF . 8B45 FC mov eax, dword ptr [ebp-4]
》》》》》》
通过对上面的的分析,知道了机器码为:得到C:盘的卷标序列号,然后乘以12345,再加上188968999的结果的无符号数;
而KEY文件的名称为:PYG_2007.dat,其长度必须是32字节,前16位保存注册名,后16位保存注册码,其算法表述为:
.局部变量 pos, 整数型
.局部变量 ebx, 整数型
.局部变量 edx, 整数型
.局部变量 ResultName, 文本型
.局部变量 name, 字节型, , "16"
.局部变量 code, 字节型, , "16"
.计次循环首 (16, pos)
name [pos] = 0
.计次循环尾 ()
.计次循环首 (16, pos)
code [pos] = 32 ' 默认为16个空格符号
.计次循环尾 ()
.计次循环首 (取文本长度 (编辑框name.内容), pos)
name [pos] = 取代码 (取文本中间 (编辑框name.内容, pos, 1), )
.计次循环尾 ()
ebx = 0
.计次循环首 (16, pos)
edx = 到整数 (name [pos]) - 15
edx = 位异或 (edx, 32)
ebx = ebx + edx
.计次循环尾 ()
ebx = ebx × 31337
ResultName = 取十六进制文本 (ebx)
.计次循环首 (取文本长度 (ResultName), pos)
code [pos] = 取代码 (取文本中间 (ResultName, pos, 1), )
.计次循环尾 ()
然后,将name和code的缓冲区中的数据写入到PYG_2007.dat文件中,即可!
前面的条件符合之后,再看Timer2.Timer事件中的代码,如下:
》》》》》》
0047672E . 64:FF30 push dword ptr fs:[eax] ; Timer2.Timer事件:
00476731 . 64:8920 mov dword ptr fs:[eax], esp
00476734 . E8 C3F1FDFF call [PYG]Cra.004558FC
00476739 . 8D95 1CFEFFFF lea edx, dword ptr [ebp-1E4]
0047673F . A1 0C934700 mov eax, dword ptr [47930C]
00476744 . 8B00 mov eax, dword ptr [eax]
00476746 . E8 81DEFDFF call [PYG]Cra.004545CC ; 得到程序名称
0047674B . 8B85 1CFEFFFF mov eax, dword ptr [ebp-1E4]
00476751 . E8 CEEEFDFF call [PYG]Cra.00455624
00476756 . 3D C0450400 cmp eax, 445C0 ; 十进制:280000
0047675B 0F8E CA000000 jle [PYG]Cra.0047682B ; 小于,便跳!(表示:加了壳)
00476761 . 8B45 FC mov eax, dword ptr [ebp-4]
(省略)
0047682B > E8 78F0FDFF call [PYG]Cra.004558A8 ; CreateFileA
00476830 . E8 83EFFDFF call [PYG]Cra.004557B8
00476835 . 33C0 xor eax, eax
00476837 . 55 push ebp
00476838 . 68 85684700 push [PYG]Cra.00476885
0047683D . 64:FF30 push dword ptr fs:[eax] ; ***** TRY
00476840 . 64:8920 mov dword ptr fs:[eax], esp
00476843 . B8 886B4700 mov eax, [PYG]Cra.00476B88 ; c:\
00476848 . E8 4FEDFDFF call [PYG]Cra.0045559C ; 得到C:\的序列号
0047684D . 69C0 39300000 imul eax, eax, 3039
00476853 . 05 2770430B add eax, 0B437027 ; eax 的10进制结果为机器码
00476858 . 33D2 xor edx, edx
0047685A . 52 push edx ; /Arg2 => 00000000
0047685B . 50 push eax ; |Arg1
0047685C . 8D85 14FEFFFF lea eax, dword ptr [ebp-1EC] ; |
00476862 . E8 251FF9FF call [PYG]Cra.0040878C ; \[PYG]Cra.0040878C
00476867 . 8B95 14FEFFFF mov edx, dword ptr [ebp-1EC] ; //机器码,上面结果的无符号数字
0047686D . 8B45 FC mov eax, dword ptr [ebp-4]
(省略)
0047694E . 8B85 10FEFFFF mov eax, dword ptr [ebp-1F0]
00476954 . E8 CBECFDFF call [PYG]Cra.00455624
00476959 . 8BD8 mov ebx, eax
0047695B . E8 58EEFDFF call [PYG]Cra.004557B8
00476960 . 83FB FF cmp ebx, -1 ; 为空
00476963 . 0F84 72010000 je [PYG]Cra.00476ADB ; 不能跳!
00476969 . 83FB 20 cmp ebx, 20 ; 十进制:32
0047696C . 0F85 69010000 jnz [PYG]Cra.00476ADB ; 不能跳!
00476972 . 8D95 04FEFFFF lea edx, dword ptr [ebp-1FC]
(省略)
004769FD . 33DB xor ebx, ebx
004769FF . B8 01000000 mov eax, 1
00476A04 > 8B55 F4 mov edx, dword ptr [ebp-C] ; 取前16位数字
00476A07 . 0FB65402 FF movzx edx, byte ptr [edx+eax-1]
00476A0C . 83EA 0F sub edx, 0F
00476A0F . 83F2 20 xor edx, 20
00476A12 . 03DA add ebx, edx
00476A14 . 40 inc eax
00476A15 . 83F8 11 cmp eax, 11 ; 十进制:17
00476A18 .^ 75 EA jnz short [PYG]Cra.00476A04 ; 小于17
00476A1A . 69C3 697A0000 imul eax, ebx, 7A69 ; 整乘法
00476A20 . 8BD8 mov ebx, eax
00476A22 . 8D85 00FEFFFF lea eax, dword ptr [ebp-200]
00476A28 . 50 push eax ; /Arg1
00476A29 . 899D F8FDFFFF mov dword ptr [ebp-208], ebx ; |
00476A2F . C685 FCFDFFFF 00 mov byte ptr [ebp-204], 0 ; |
00476A36 . 8D95 F8FDFFFF lea edx, dword ptr [ebp-208] ; |
00476A3C . 33C9 xor ecx, ecx ; |
00476A3E . B8 386C4700 mov eax, [PYG]Cra.00476C38 ; |%0x
00476A43 . E8 E02AF9FF call [PYG]Cra.00409528 ; \[PYG]Cra.00409528
00476A48 . 8B85 00FEFFFF mov eax, dword ptr [ebp-200] ; //结果
00476A4E . 8D55 F0 lea edx, dword ptr [ebp-10]
00476A51 . E8 FA18F9FF call [PYG]Cra.00408350 ; SysUtils.UpperCase(AnsiString):AnsiString;
00476A56 . 8D95 F4FDFFFF lea edx, dword ptr [ebp-20C]
00476A5C . 8B45 EC mov eax, dword ptr [ebp-14] ; 取后16位数字
00476A5F . E8 3C1BF9FF call [PYG]Cra.004085A0 ;SysUtils.Trim(AnsiString):AnsiString;overload;
00476A64 . 8B85 F4FDFFFF mov eax, dword ptr [ebp-20C]
00476A6A . 8B55 F0 mov edx, dword ptr [ebp-10]
00476A6D . E8 66DEF8FF call [PYG]Cra.004048D8 ; System.@LStrCmp;
00476A72 . 0F85 C3000000 jnz [PYG]Cra.00476B3B ; 不能跳!要相等
00476A78 . 8B45 FC mov eax, dword ptr [ebp-4]
(省略)
》》》》》》
通过对上面的分析,发现其检测的代码和窗口创建时候的几乎雷同,故跳过,不用分析了;
但是必须注意:
要将 0047675B /0F8E CA000000 jle [PYG]Cra.0047682B 这行改为jmp强制跳转哟!
不然到不了Button1按钮中的代码,呵呵;谁让我不是带壳调试呐 ;)
将上面修改之后,这时点击『注册』按钮,便来到了Button1按钮点击后的事件中(不是Button1_a按钮哟),其代码如下:
》》》》》》
00474263 |. 51 push ecx ; Button1 按钮中的代码:
00474264 |. 53 push ebx
00474265 |. 56 push esi
00474266 |. 8945 FC mov dword ptr [ebp-4], eax
00474269 |. 8D45 E8 lea eax, dword ptr [ebp-18]
0047426C |. 8B15 88594500 mov edx, dword ptr [455988] ; [PYG]Cra.0045598C
00474272 |. E8 0D0CF9FF call [PYG]Cra.00404E84 ; System.@InitializeRecord
00474277 |. 8D45 E0 lea eax, dword ptr [ebp-20] ; System.@AddRefRecord
0047427A |. 8B15 88594500 mov edx, dword ptr [455988] ; [PYG]Cra.0045598C
00474280 |. E8 FF0BF9FF call [PYG]Cra.00404E84 ; System.@InitializeRecord
00474285 |. 8D45 D8 lea eax, dword ptr [ebp-28] ; System.@AddRefRecord
00474288 |. 8B15 88594500 mov edx, dword ptr [455988] ; [PYG]Cra.0045598C
0047428E |. E8 F10BF9FF call [PYG]Cra.00404E84 ; System.@InitializeRecord
00474293 |. 33C0 xor eax, eax
00474295 |. 55 push ebp
00474296 |. 68 15474700 push [PYG]Cra.00474715
0047429B |. 64:FF30 push dword ptr fs:[eax]
0047429E |. 64:8920 mov dword ptr fs:[eax], esp
004742A1 |. E8 1215FEFF call [PYG]Cra.004557B8
004742A6 |. 8D55 84 lea edx, dword ptr [ebp-7C]
004742A9 |. 8B45 FC mov eax, dword ptr [ebp-4]
004742AC |. 8B80 04030000 mov eax, dword ptr [eax+304] ; TEdit3
004742B2 |. E8 2502FCFF call [PYG]Cra.004344DC ;Controls.TControl.GetText(TControl):TCaption
004742B7 |. 8B45 84 mov eax, dword ptr [ebp-7C]
004742BA |. E8 1512FEFF call [PYG]Cra.004554D4
004742BF |. 84C0 test al, al ; 是否输入了Email?
004742C1 |. 75 0F jnz short [PYG]Cra.004742D2 ; 有,则跳
004742C3 |. 8D45 F8 lea eax, dword ptr [ebp-8]
004742C6 |. BA 30474700 mov edx, [PYG]Cra.00474730 ; piaoyun04@163.com
004742CB |. E8 9402F9FF call [PYG]Cra.00404564
004742D0 |. EB 11 jmp short [PYG]Cra.004742E3
004742D2 |> 8D55 F8 lea edx, dword ptr [ebp-8]
004742D5 |. 8B45 FC mov eax, dword ptr [ebp-4]
004742D8 |. 8B80 04030000 mov eax, dword ptr [eax+304] ; TEdit3
004742DE |. E8 F901FCFF call [PYG]Cra.004344DC ; 得到Email的长度 -> eax
004742E3 |> 33DB xor ebx, ebx
004742E5 |. C745 98 596F7520 mov dword ptr [ebp-68], 20756F59 ; 'You '
004742EC |. C745 9C 6C6F7665 mov dword ptr [ebp-64], 65766F6C ; 'love'
004742F3 |. C745 A0 20505947 mov dword ptr [ebp-60], 47595020 ; ' PYG'
004742FA |. 8B45 F8 mov eax, dword ptr [ebp-8] ; Email -> eax
004742FD |. E8 8A04F9FF call [PYG]Cra.0040478C ; 得到Email的长度 -> eax
00474302 |. 8BC8 mov ecx, eax
00474304 |. 85C9 test ecx, ecx ; Emai长度是否为0?
00474306 |. 7E 19 jle short [PYG]Cra.00474321
00474308 |. BE 01000000 mov esi, 1
0047430D |> 8B45 F8 /mov eax, dword ptr [ebp-8] ; Email -> eax
00474310 |. 0FB64430 FF |movzx eax, byte ptr [eax+esi-1] ; 依次取Email的ASCII码
00474315 |. 83C0 0F |add eax, 0F ; 加上 $F
00474318 |. 83F0 20 |xor eax, 20 ; 异或 $20
0047431B |. 03D8 |add ebx, eax ; ebx := ebx + eax;(结果)
0047431D |. 46 |inc esi
0047431E |. 49 |dec ecx ; 减去1
0047431F |.^ 75 EC \jnz short [PYG]Cra.0047430D ; 不为0,则循环
00474321 |> 8BC3 mov eax, ebx ; -> eax
00474323 |. 33D2 xor edx, edx
00474325 |. 52 push edx ; /Arg2 => 00000000
00474326 |. 50 push eax ; |Arg1
00474327 |. 8D45 F4 lea eax, dword ptr [ebp-C] ; |
0047432A |. E8 5D44F9FF call [PYG]Cra.0040878C ; \[将上面的结果转换为10进制的字符串
0047432F |. 8D55 80 lea edx, dword ptr [ebp-80]
00474332 |. 8B45 FC mov eax, dword ptr [ebp-4]
00474335 |. 8B80 00030000 mov eax, dword ptr [eax+300] ; TEdit2
0047433B |. E8 9C01FCFF call [PYG]Cra.004344DC
00474340 |. 8B4D 80 mov ecx, dword ptr [ebp-80] ; 注册名 -> ecx
00474343 |. 8D45 F0 lea eax, dword ptr [ebp-10]
00474346 |. 8B55 F4 mov edx, dword ptr [ebp-C] ; 前面计算结果的十进制数 字符串
00474349 |. E8 8A04F9FF call [PYG]Cra.004047D8 ; 两字符串连接
0047434E |. 8B45 F0 mov eax, dword ptr [ebp-10] ; 新结果 -> eax
00474351 |. E8 3604F9FF call [PYG]Cra.0040478C ; 得到新字符串的长度 -> eax
00474356 |. 8BC8 mov ecx, eax ; ecx := eax;
00474358 |. 85C9 test ecx, ecx ; 新字符串是否为空?
0047435A |. 7E 22 jle short [PYG]Cra.0047437E ; 为空,则跳
0047435C |. BE 01000000 mov esi, 1
00474361 |> 8B45 F0 /mov eax, dword ptr [ebp-10] ; 新字符串 -> eax
00474364 |. 0FB64430 FF |movzx eax, byte ptr [eax+esi-1] ; 依次取该字符串的ASCII码 -> eax
00474369 |. 0345 98 |add eax, dword ptr [ebp-68] ; 初始值: $20756F59 加法
0047436C |. 25 FF000000 |and eax, 0FF ; 与 运输 $FF
00474371 |. 03C3 |add eax, ebx ; 加上前面的结果
00474373 |. 99 |cdq
00474374 |. 33C2 |xor eax, edx
00474376 |. 2BC2 |sub eax, edx ; eax := eax - edx;
00474378 |. 8BD8 |mov ebx, eax ; -> ebx
0047437A |. 46 |inc esi
0047437B |. 49 |dec ecx ; 减去1
0047437C |.^ 75 E3 \jnz short [PYG]Cra.00474361 ; 不为0,这循环运算
0047437E |> 8BC3 mov eax, ebx
00474380 |. C1E0 0A shl eax, 0A ; 上面的结果 shl $0A
00474383 |. 0345 9C add eax, dword ptr [ebp-64] ; 再加上 $65766F6C
00474386 |. 99 cdq
00474387 |. 33C2 xor eax, edx
00474389 |. 2BC2 sub eax, edx
0047438B |. 8BD8 mov ebx, eax
0047438D |. 8BC3 mov eax, ebx
0047438F |. 33D2 xor edx, edx
00474391 |. 52 push edx ; /Arg2 => 00000000
00474392 |. 50 push eax ; |Arg1
00474393 |. 8D85 7CFFFFFF lea eax, dword ptr [ebp-84] ; |
00474399 |. E8 EE43F9FF call [PYG]Cra.0040878C ; \[PYG]Cra.0040878C
0047439E |. 8B85 7CFFFFFF mov eax, dword ptr [ebp-84] ; 上面运算结果的10进制字符串 ->eax
004743A4 |. 8D55 E8 lea edx, dword ptr [ebp-18]
004743A7 |. E8 B017FEFF call [PYG]Cra.00455B5C ; 字上面的符串转换为大数
004743AC |. 8B45 A0 mov eax, dword ptr [ebp-60] ; ' PYG'的ascII码 -> eax
004743AF |. 05 40E20100 add eax, 1E240 ; eax := $47595020 + $1E240
004743B4 |. 33D2 xor edx, edx
004743B6 |. 52 push edx ; /Arg2 => 00000000
004743B7 |. 50 push eax ; |$475B3260 <- eax
004743B8 |. 8D85 78FFFFFF lea eax, dword ptr [ebp-88] ; |
004743BE |. E8 C943F9FF call [PYG]Cra.0040878C ; \[PYG]Cra.0040878C
004743C3 |. 8B85 78FFFFFF mov eax, dword ptr [ebp-88] ; 上面运算结果的10进制字符串(就是固定的)
004743C9 |. 8D55 E0 lea edx, dword ptr [ebp-20]
004743CC |. E8 8B17FEFF call [PYG]Cra.00455B5C ; 字上面的符串转换为大数
004743D1 |. 8D4D D8 lea ecx, dword ptr [ebp-28]
004743D4 |. 8D55 E0 lea edx, dword ptr [ebp-20]
004743D7 |. 8D45 E8 lea eax, dword ptr [ebp-18]
004743DA |. E8 891BFEFF call [PYG]Cra.00455F68 ; //计算第一组数据 大数加法
004743DF |. 8D55 D4 lea edx, dword ptr [ebp-2C]
004743E2 |. 8D45 D8 lea eax, dword ptr [ebp-28]
004743E5 |. E8 D219FEFF call [PYG]Cra.00455DBC ; //将其转换为10进制的字符串(去掉前面的0)
004743EA |. 8D4D D8 lea ecx, dword ptr [ebp-28]
004743ED |. 8D55 E0 lea edx, dword ptr [ebp-20]
004743F0 |. 8D45 E8 lea eax, dword ptr [ebp-18]
004743F3 |. E8 041FFEFF call [PYG]Cra.004562FC ; //计算第二组数据 大数乘法
004743F8 |. 8D55 D0 lea edx, dword ptr [ebp-30]
004743FB |. 8D45 D8 lea eax, dword ptr [ebp-28]
004743FE |. E8 B919FEFF call [PYG]Cra.00455DBC ; //将其转换为10进制的字符串(去掉前面的0)
00474403 |. 8D4D D8 lea ecx, dword ptr [ebp-28]
00474406 |. 8D55 E0 lea edx, dword ptr [ebp-20]
00474409 |. 8D45 E8 lea eax, dword ptr [ebp-18]
0047440C |. E8 AB1DFEFF call [PYG]Cra.004561BC ; //计算第三组数据 不是大数运算哟!
00474411 |. 8D45 D8 lea eax, dword ptr [ebp-28]
00474414 |. E8 A71EFEFF call [PYG]Cra.004562C0
00474419 |. 8D55 CC lea edx, dword ptr [ebp-34]
0047441C |. 8D45 D8 lea eax, dword ptr [ebp-28]
0047441F |. E8 9819FEFF call [PYG]Cra.00455DBC ; //将其转换为10进制的字符串(去掉前面的0)
00474424 |. FF75 D4 push dword ptr [ebp-2C] ; //(ASCII)1
00474427 |. FF75 D0 push dword ptr [ebp-30] ; //(ASCII)2
0047442A |. FF75 CC push dword ptr [ebp-34] ; //(ASCII)3
0047442D |. 8D45 C8 lea eax, dword ptr [ebp-38]
00474430 |. BA 03000000 mov edx, 3
00474435 |. E8 1204F9FF call [PYG]Cra.0040484C ; System.@LStrCatN
0047443A |. 8D55 E8 lea edx, dword ptr [ebp-18]
0047443D |. 8B45 C8 mov eax, dword ptr [ebp-38] ; //(ASCII)1+2+3 -> eax
00474440 |. E8 1717FEFF call [PYG]Cra.00455B5C ; 字上面的符串转换为大数
00474445 |. 8D95 74FFFFFF lea edx, dword ptr [ebp-8C]
0047444B |. B8 00DE0000 mov eax, 0DE00 ; KEy: $DC00 -> eax
00474450 |. E8 4B42F9FF call [PYG]Cra.004086A0 ; 转为字符串
00474455 |. 8B85 74FFFFFF mov eax, dword ptr [ebp-8C] ; 即为(ASCII "56832") -> eax
0047445B |. 8D55 E0 lea edx, dword ptr [ebp-20]
0047445E |. E8 F916FEFF call [PYG]Cra.00455B5C ; 字上面的符串转换为大数
00474463 |. 8D4D D8 lea ecx, dword ptr [ebp-28]
00474466 |. 8D55 E0 lea edx, dword ptr [ebp-20]
00474469 |. 8D45 E8 lea eax, dword ptr [ebp-18]
0047446C |. E8 8B1EFEFF call [PYG]Cra.004562FC ; 得到注册码的第一部份 大数乘法
00474471 |. 8D55 C4 lea edx, dword ptr [ebp-3C]
00474474 |. 8D45 D8 lea eax, dword ptr [ebp-28]
00474477 |. E8 4019FEFF call [PYG]Cra.00455DBC ; //将其转换为10进制的字符串(去掉前面的0)
0047447C |. 8D45 C4 lea eax, dword ptr [ebp-3C]
0047447F |. BA 20000000 mov edx, 20 ; 取长度为:32
00474484 |. E8 8F06F9FF call [PYG]Cra.00404B18 ; 从头开始截取32长度
00474489 |. 8D85 6CFFFFFF lea eax, dword ptr [ebp-94]
0047448F |. 50 push eax
00474490 |. 8D95 64FFFFFF lea edx, dword ptr [ebp-9C]
00474496 |. 8B45 FC mov eax, dword ptr [ebp-4]
00474499 |. 8B80 FC020000 mov eax, dword ptr [eax+2FC] ; TEdit1
0047449F |. E8 3800FCFF call [PYG]Cra.004344DC ; Controls.TControl.GetText(TControl):TCaption
004744A4 |. 8B85 64FFFFFF mov eax, dword ptr [ebp-9C] ; //机器码 -> eax
004744AA |. E8 0558F9FF call [PYG]Cra.00409CB4 ; 机器码转化为实数
004744AF |. D80D 44474700 fmul dword ptr [474744] ; * 3.000000
004744B5 |. D805 48474700 fadd dword ptr [474748] ; + 521725.0
004744BB |. 83C4 F4 add esp, -0C
004744BE |. DB3C24 fstp tbyte ptr [esp] ; |出栈 -> ST7
004744C1 |. 9B wait ; |
004744C2 |. 8D85 68FFFFFF lea eax, dword ptr [ebp-98] ; |
004744C8 |. E8 8757F9FF call [PYG]Cra.00409C54 ; \[转化为字符串
004744CD |. 8B85 68FFFFFF mov eax, dword ptr [ebp-98] ; //ST7 由机器码得来 -> eax
004744D3 |. B9 08000000 mov ecx, 8 ; ecx := 8;
004744D8 |. BA 01000000 mov edx, 1
004744DD |. E8 0A05F9FF call [PYG]Cra.004049EC ; System.@LStrCopy
004744E2 |. 8B85 6CFFFFFF mov eax, dword ptr [ebp-94] ; //上面结果的前8位字符 -> eax
004744E8 |. E8 C757F9FF call [PYG]Cra.00409CB4 ; 再次转化为实数
004744ED |. D80D 4C474700 fmul dword ptr [47474C] ; * 321.0000
004744F3 |. DB2D 50474700 fld tbyte ptr [474750] ; 9614516412.0000000000 -> ST0
004744F9 |. DEC1 faddp st(1), st ; ST1 + ST0
004744FB |. DB2D 5C474700 fld tbyte ptr [47475C] ; 96145164.000000000000 -> ST0
00474501 |. DEE9 fsubp st(1), st ; ST1 - ST0
00474503 |. 83C4 F4 add esp, -0C
00474506 |. DB3C24 fstp tbyte ptr [esp] ; |出栈 -> ST7
00474509 |. 9B wait ; |
0047450A |. 8D85 70FFFFFF lea eax, dword ptr [ebp-90] ; |
00474510 |. E8 3F57F9FF call [PYG]Cra.00409C54 ; \[PYG]Cra.00409C54
00474515 |. 8B95 70FFFFFF mov edx, dword ptr [ebp-90] ; //ST7 注册码第2部分 -> edx
0047451B |. 8D45 C4 lea eax, dword ptr [ebp-3C]
0047451E |. E8 7102F9FF call [PYG]Cra.00404794 ; 注册码第1/2部分连接
00474523 |. 8D55 88 lea edx, dword ptr [ebp-78]
00474526 |. 8B45 C4 mov eax, dword ptr [ebp-3C] ; 注册码1/2部分连接后 -> eax
00474529 |. E8 9E29FEFF call [PYG]Cra.00456ECC ; 将上面的结果MD5加密
0047452E |. 8D95 60FFFFFF lea edx, dword ptr [ebp-A0]
00474534 |. 8D45 88 lea eax, dword ptr [ebp-78]
00474537 |. E8 042AFEFF call [PYG]Cra.00456F40
0047453C |. 8B85 60FFFFFF mov eax, dword ptr [ebp-A0] ; MD5加密结果 -> eax
00474542 |. 8D55 C0 lea edx, dword ptr [ebp-40]
00474545 |. E8 063EF9FF call [PYG]Cra.00408350 ; 转为大写
0047454A |. 8D45 BC lea eax, dword ptr [ebp-44]
0047454D |. 50 push eax
0047454E |. B9 08000000 mov ecx, 8
00474553 |. BA 01000000 mov edx, 1
00474558 |. 8B45 C0 mov eax, dword ptr [ebp-40]
0047455B |. E8 8C04F9FF call [PYG]Cra.004049EC ; System.@LStrCopy
00474560 |. 8D45 B8 lea eax, dword ptr [ebp-48]
00474563 |. 50 push eax
00474564 |. B9 08000000 mov ecx, 8
00474569 |. BA 09000000 mov edx, 9
0047456E |. 8B45 C0 mov eax, dword ptr [ebp-40] ; MD5加密结果 -> eax
00474571 |. E8 7604F9FF call [PYG]Cra.004049EC ; System.@LStrCopy
00474576 |. 8D4D B4 lea ecx, dword ptr [ebp-4C]
00474579 |. BA 10000000 mov edx, 10
0047457E |. 8B45 C0 mov eax, dword ptr [ebp-40]
00474581 |. E8 C258FBFF call [PYG]Cra.00429E48 ; StrUtils.RightStr(AnsiString;Integer):AnsiString
00474586 |. 8D95 5CFFFFFF lea edx, dword ptr [ebp-A4]
0047458C |. 8B45 FC mov eax, dword ptr [ebp-4]
0047458F |. 8B80 28030000 mov eax, dword ptr [eax+328] ; TEdit4
00474595 |. E8 42FFFBFF call [PYG]Cra.004344DC ; Controls.TControl.GetText(TControl):TCaption
0047459A |. 8B85 5CFFFFFF mov eax, dword ptr [ebp-A4] ; 获取输入的注册码 -> eax
004745A0 |. 8D55 88 lea edx, dword ptr [ebp-78]
004745A3 |. E8 2429FEFF call [PYG]Cra.00456ECC ; 将输入的注册码 MD5加密
004745A8 |. 8D95 58FFFFFF lea edx, dword ptr [ebp-A8]
004745AE |. 8D45 88 lea eax, dword ptr [ebp-78]
004745B1 |. E8 8A29FEFF call [PYG]Cra.00456F40 ; MD5加密
004745B6 |. 8B85 58FFFFFF mov eax, dword ptr [ebp-A8] ; 加密结果 -> eax
004745BC |. 8D55 B0 lea edx, dword ptr [ebp-50]
004745BF |. E8 8C3DF9FF call [PYG]Cra.00408350 ; 转为大写
004745C4 |. 8D45 AC lea eax, dword ptr [ebp-54]
004745C7 |. 50 push eax
004745C8 |. B9 08000000 mov ecx, 8
004745CD |. BA 01000000 mov edx, 1
004745D2 |. 8B45 B0 mov eax, dword ptr [ebp-50]
004745D5 |. E8 1204F9FF call [PYG]Cra.004049EC ; System.@LStrCopy
004745DA |. 8D45 A8 lea eax, dword ptr [ebp-58]
004745DD |. 50 push eax
004745DE |. B9 08000000 mov ecx, 8
004745E3 |. BA 09000000 mov edx, 9
004745E8 |. 8B45 B0 mov eax, dword ptr [ebp-50]
004745EB |. E8 FC03F9FF call [PYG]Cra.004049EC ; System.@LStrCopy
004745F0 |. 8D4D A4 lea ecx, dword ptr [ebp-5C]
004745F3 |. BA 10000000 mov edx, 10
004745F8 |. 8B45 B0 mov eax, dword ptr [ebp-50]
004745FB |. E8 4858FBFF call [PYG]Cra.00429E48 ;StrUtils.RightStr(AnsiString;Integer):AnsiString
00474600 |. 8B45 BC mov eax, dword ptr [ebp-44] ; //被MD5加密的真正的注册码 前8位
00474603 |. 8B55 AC mov edx, dword ptr [ebp-54] ; //被MD5加密的输入的注册码 前8位
00474606 |. E8 CD02F9FF call [PYG]Cra.004048D8 ; 比较,是否相同?
0047460B 75 7F jnz short [PYG]Cra.0047468C ; 不同,则跳出
0047460D |. 8B45 B8 mov eax, dword ptr [ebp-48] ; //被MD5加密的真正的注册码9~16位
00474610 |. 8B55 A8 mov edx, dword ptr [ebp-58] ; //被MD5加密的输入的注册码9~16位
00474613 |. E8 C002F9FF call [PYG]Cra.004048D8 ; System.@LStrCmp
00474618 |. 75 72 jnz short [PYG]Cra.0047468C ; 不同,则跳出
0047461A |. 8B45 B4 mov eax, dword ptr [ebp-4C] ; //被MD5加密的真正的注册码 其余剩下的
0047461D |. 8B55 A4 mov edx, dword ptr [ebp-5C] ; //被MD5加密的输入的注册码 其余剩下的
00474620 |. E8 B302F9FF call [PYG]Cra.004048D8 ; System.@LStrCmp
00474625 |. 75 65 jnz short [PYG]Cra.0047468C ; 不同,则跳出
00474627 |. B8 70474700 mov eax, [PYG]Cra.00474770 ; 注册假成功!
0047462C |. E8 6742FBFF call [PYG]Cra.00428898 ;* Reference to: Dialogs.ShowMessage(AnsiString);
00474631 |. 8D95 54FFFFFF lea edx, dword ptr [ebp-AC]
00474637 |. B8 84474700 mov eax, [PYG]Cra.00474784 ; 糟糕!中计了!
0047463C |. E8 7B2AFEFF call [PYG]Cra.004570BC
00474641 |. 8B85 54FFFFFF mov eax, dword ptr [ebp-AC]
00474647 |. E8 4C42FBFF call [PYG]Cra.00428898 ; Dialogs.ShowMessage(AnsiString)
0047464C |. 8B45 FC mov eax, dword ptr [ebp-4]
》》》》》》
通过对上面的分析,知道了其算法为:
读取E-mail中的字符串,检查是否为空,不为空,则依次取其字符码,循环运算,得到一个数字,然后将该数字转换为10进制的字符串,
再和Key文件中读入的注册名相连接,然后再参与一个循环运算,得到的数字转换为10进制的字符串后,即为大数运算的一个变量,而另一
个大数变量则是固定的16进制数:475B3260,即为2进制的:1000111010110110011001001100000,将两者先做加法运算,得到第一个字符
串STR1;再做乘法运算,得到第二个字符串STR2;然后将Email和注册名连接运算后的结果再次加上16进制数$80000000,然后减去16进制数
$475B3260,再和16进制数$7FFFFFFF作与(and)运算,其结果转化为字符串后,即为第三个字符串STR3;将三个字符串连接起来后,再以
字符串'56832'作key,进行大数乘法运算,得到新的结果后,取该结果前面的32位字符,即成为最终注册码的第一部分;
接着,将机器码转化为实数,乘以 3.000000 后,加上 521725.0 后,取该结果的前8位字符,然后再次将该结果转化为实数,乘以 321.00
00 后,加上 9614516412.0000000000 后,再减去 96145164.000000000000 之后,转换为字符串便得到了最终注册码的第二部分;
将上面的一、二部分连接后,便得到了一个长字符串;将该字符串再次输入到CrackMe的注册码编辑框中,这是被断在了Edit4编辑框被改
变的事件处,通过对其分析,发现其前部分几乎和Button1按钮点击事件的代码雷同,而不同的仅是如下的代码:
》》》》》》
004754C3 . /74 05 je short [PYG]Cra.004754CA
004754C5 .^|75 F8 jnz short [PYG]Cra.004754BF
004754C7 > |51 push ecx
004754C8 .^|EB F1 jmp short [PYG]Cra.004754BB
004754CA > \8B45 BC mov eax, dword ptr [ebp-44] ; 被MD5加密的真正的注册码 前8位
004754CD . 8B55 AC mov edx, dword ptr [ebp-54] ; 被MD5加密的输入的注册码 前8位
004754D0 . E8 03F4F8FF call [PYG]Cra.004048D8 ; 比较
004754D5 75 7B jnz short [PYG]Cra.00475552 ; 相等,则不跳
004754D7 . 8B45 B8 mov eax, dword ptr [ebp-48] ; 被MD5加密的真正的注册码9~16位
004754DA . 8B55 A8 mov edx, dword ptr [ebp-58] ; 被MD5加密的输入的注册码9~16位
004754DD . E8 F6F3F8FF call [PYG]Cra.004048D8 ; 比较
004754E2 75 6E jnz short [PYG]Cra.00475552 ; 相等,则不跳
004754E4 . 8B45 B4 mov eax, dword ptr [ebp-4C] ; 被MD5加密的真正的注册码 其余剩下的
004754E7 . 8B55 A4 mov edx, dword ptr [ebp-5C] ; 被MD5加密的输入的注册码 其余剩下的
004754EA . E8 E9F3F8FF call [PYG]Cra.004048D8 ; 比较
004754EF 75 61 jnz short [PYG]Cra.00475552 ; 相等,则不跳
004754F1 . 8B45 A0 mov eax, dword ptr [ebp-60]
004754F4 . BA 44564700 mov edx, [PYG]Cra.00475644 ; 'PYG2007'
004754F9 . E8 DAF3F8FF call [PYG]Cra.004048D8 ; 比较
004754FE 75 12 jnz short [PYG]Cra.00475512 ; 相等,则不跳
00475500 . 8B45 FC mov eax, dword ptr [ebp-4]
00475503 . 8B80 34030000 mov eax, dword ptr [eax+334] ; Timer1 : TTimer
00475509 . B2 01 mov dl, 1
0047550B . E8 B444FBFF call [PYG]Cra.004299C4 ; ExtCtrls.TTimer.SetEnabled(TTimer;Boolean);
00475510 . EB 40 jmp short [PYG]Cra.00475552 ; 成功!! 跳向光明之颠!!
00475512 > 8B45 FC mov eax, dword ptr [ebp-4]
》》》》》》
发现上面的代码要检查注册码的最后是否有‘PYG2007’这个字符串,将其加上后,呵呵,注册成功了哟!飞向光明之颠!!
通过对上面的分析后,写出了该CrackMe的易语言相关算法代码如下:(已经写成为一个函数,方便你的调用,嘿嘿)
.支持库 eCalc
.子程序 相关注册算法, 文本型, , PYG_CrackMe 2007 的注册算法
.参数 Email, 文本型
.局部变量 i, 整数型, , , integer
.局部变量 x, 整数型, , , integer
.局部变量 EmailKey1, 整数型, , , integer
.局部变量 EmailKey2, 整数型, , , integer
.局部变量 tempSTR, 文本型, , , string
.局部变量 KeyStr1, 文本型, , , string
.局部变量 KeyStr2, 文本型, , , string
.局部变量 KeyStr3, 文本型, , , string
.局部变量 KeyStrA, 文本型, , , string
.局部变量 KeyStrB, 文本型, , , string
.局部变量 KeyStr, 文本型, , , string
.局部变量 tempFG1, 大数, , , 大数运算的变量
.局部变量 tempFG2, 大数, , , 大数运算的变量
.局部变量 FGIntKey, 大数, , , 大数运算的变量
.局部变量 tempMAC, 双精度小数型, , , real
.判断开始 (编辑框name.内容 = “”)
返回 (“请输入你的大名,呵呵 ;)”)
.判断 (取文本长度 (编辑框name.内容) > 16)
返回 (“注册名长度不能超过16位字符 ;)”)
.判断 (编辑框email.内容 = “”) ' 是否输入了电子邮件
返回 (“请输入你的电邮,呵呵 ;)”)
.判断 (寻找文本 (编辑框email.内容, “@”, 1, 真) = -1)
返回 (“电邮中没有 @ 符号 ;)”)
.判断 (寻找文本 (编辑框email.内容, “.”, 1, 真) = -1)
返回 (“电邮中没有 . 符号 ;)”)
.默认
EmailKey1 = 0
.计次循环首 (取文本长度 (Email), x)
i = 取代码 (取文本中间 (Email, x, 1), ) + 15
i = 位异或 (i, 32)
EmailKey1 = EmailKey1 + i
.计次循环尾 ()
tempSTR = 到文本 (EmailKey1) + 编辑框name.内容
EmailKey2 = 取代码 (取文本中间 (tempSTR, 1, 1), ) + 544567129
EmailKey2 = 位与 (EmailKey2, 255)
EmailKey2 = EmailKey2 + EmailKey1
.如果真 (取文本长度 (tempSTR) > 1)
.计次循环首 (取文本长度 (tempSTR) - 1, x)
x = x + 1 ' 从第2次开始,x初始值为1
i = 取代码 (取文本中间 (tempSTR, x, 1), ) + 544567129
i = 位与 (i, 255)
EmailKey2 = EmailKey2 + i
.计次循环尾 ()
.如果真结束
EmailKey2 = 左移 (EmailKey2, 10)
EmailKey2 = EmailKey2 + 1702260588
tempSTR = 到文本 (EmailKey2)
KeyStr1 = 大数运算_加 (tempSTR, “1197159008”) ' 十进制数: 1197159008 即为十六进制数: 475B3260
KeyStr2 = 大数运算_乘 (tempSTR, “1197159008”)
EmailKey2 = EmailKey2 + 2147483648 - 1197159008
EmailKey2 = 位与 (EmailKey2, 2147483647)
KeyStr3 = 到文本 (EmailKey2)
KeyStrA = KeyStr1 + KeyStr2 + KeyStr3
KeyStrB = “56832”
KeyStr = 大数运算_乘 (KeyStrA, KeyStrB)
KeyStr = 取文本左边 (KeyStr, 32) ' 最终注册码的第一部分
tempMAC = 到数值 (编辑框id.内容)
tempMAC = tempMAC × 3
tempMAC = tempMAC + 521725
tempSTR = 取文本左边 (到文本 (tempMAC), 8)
tempMAC = 到数值 (tempSTR)
tempMAC = tempMAC × 321
tempMAC = tempMAC + 9614516412
tempMAC = tempMAC - 96145164
tempSTR = 到文本 (tempMAC) ' 最终注册码的第二部分
KeyStr = KeyStr + tempSTR + “PYG2007” ' 连接一/二/三部分
生成KEY文件 ()
返回 (KeyStr)
最后,再在计算按钮中添加如下代码,即可:
.子程序 _计算按钮_被单击, , , keygen计算代码
编辑框code.内容 = 相关注册算法 (编辑框email.内容)
好的,就到这里结束吧!在我的附件中放有:PYG官方的'[PYG]CrackMe2007.EXE'原版CrackMe程序以及我写的注册机'注册机(易语言版)
.exe'供参考,分析难免有不当之处,还请给我指出来!
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【版权声明】: 本文由 aCaFeeL[DCG][OCN][PYG] 原创, 转载请注明作者并保持文章的完整性, 谢谢! 再见!!
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