AA制费用分摊 1.21简单MD5算法分析(超级简单！)

playboyjin · 发表于 2007-3-14 13:26:16

【破文标题】AA制费用分摊 1.21简单MD5算法分析(超级简单！)
【破文作者】playboyjin[火鸟]
【作者邮箱】playboyjin@163.com
【作者主页】http://group301.ttsite.com
【破解工具】PEID OD
【破解平台】WINXP
【软件名称】AA制费用分摊 1.21
【软件大小】244K
【原版下载】http://www.newhua.com/soft/49919.htm
【保护方式】无壳
【软件简介】AA制费用分摊软件是一款绿色软件。主要用于集体活动后的费用分摊.包括记流水帐、软件设置、费用查询等功能..
【破解声明】本人系正宗菜鸟,初学cracking,,仅作学习交流，无其它目的.
------------------------------------------------------------------------
【破解过程】一。查壳为Microsoft Visual C++ 6.0 呵呵～～
通过查找字符串很容易来到下面：

004081E0 .  6A FF       PUSH -1
004081E2 .  68 49F94100 PUSH FeeAVG.0041F949                   ;  SE 处理程序安装
004081E7 .  64:A1 0000000>MOV EAX,DWORD PTR FS:[0]
004081ED .  50          PUSH EAX
004081EE .  64:8925 00000>MOV DWORD PTR FS:[0],ESP
004081F5 .  81EC E8000000 SUB ESP,0E8
004081FB .  53          PUSH EBX
004081FC .  55          PUSH EBP
004081FD .  8BE9       MOV EBP,ECX
004081FF .  56          PUSH ESI
00408200 .  57          PUSH EDI
00408201 .  8D4C24 14    LEA ECX,DWORD PTR SS:[ESP+14]
00408205 .  E8 56590100 CALL <[email=JMP.&MFC42.#540_??0CString@@QAE@XZ]JMP.&MFC42.#540_??0CString@@QAE@XZ[/email]>
0040820A .  8D4C24 10    LEA ECX,DWORD PTR SS:[ESP+10]
0040820E .  C78424 000100>MOV DWORD PTR SS:[ESP+100],0
00408219 .  E8 42590100 CALL <[email=JMP.&MFC42.#540_??0CString@@QAE@XZ]JMP.&MFC42.#540_??0CString@@QAE@XZ[/email]>
0040821E .  8D4424 14    LEA EAX,DWORD PTR SS:[ESP+14]
00408222 .  8BCD       MOV ECX,EBP
00408224 .  50          PUSH EAX
00408225 .  68 0C040000 PUSH 40C
0040822A .  C68424 080100>MOV BYTE PTR SS:[ESP+108],1
00408232 .  E8 0B5C0100 CALL <JMP.&MFC42.#3097_?GetDlgItemTextA@>
00408237 .  8D4C24 10    LEA ECX,DWORD PTR SS:[ESP+10]          ;  取机器码3CB84E02
0040823B .  51          PUSH ECX
0040823C .  68 10040000 PUSH 410
00408241 .  8BCD       MOV ECX,EBP
00408243 .  E8 FA5B0100 CALL <JMP.&MFC42.#3097_?GetDlgItemTextA@>;  取假码
00408248 .  B9 10000000 MOV ECX,10
0040824D .  33C0       XOR EAX,EAX
0040824F .  8D7C24 31    LEA EDI,DWORD PTR SS:[ESP+31]
00408253 .  C64424 30 00  MOV BYTE PTR SS:[ESP+30],0
00408258 .  F3:AB       REP STOS DWORD PTR ES:[EDI]
0040825A .  8D4C24 28    LEA ECX,DWORD PTR SS:[ESP+28]
0040825E .  8DB5 90000000 LEA ESI,DWORD PTR SS:[EBP+90]
00408264 .  E8 F7580100 CALL <[email=JMP.&MFC42.#540_??0CString@@QAE@XZ]JMP.&MFC42.#540_??0CString@@QAE@XZ[/email]>
00408269 .  8D4C24 1C    LEA ECX,DWORD PTR SS:[ESP+1C]
0040826D .  C68424 000100>MOV BYTE PTR SS:[ESP+100],2
00408275 .  E8 E6580100 CALL <[email=JMP.&MFC42.#540_??0CString@@QAE@XZ]JMP.&MFC42.#540_??0CString@@QAE@XZ[/email]>
0040827A .  8D5424 14    LEA EDX,DWORD PTR SS:[ESP+14]
0040827E .  8D4424 20    LEA EAX,DWORD PTR SS:[ESP+20]
00408282 .  52          PUSH EDX
00408283 .  B3 03       MOV BL,3
00408285 .  68 24A74200 PUSH FeeAVG.0042A724                   ;  good
0040828A .  50          PUSH EAX
0040828B .  889C24 0C0100>MOV BYTE PTR SS:[ESP+10C],BL
00408292 .  E8 7D590100 CALL <[email=JMP.&MFC42.#926_??H@YG?AVCString]JMP.&MFC42.#926_??H@YG?AVCString[/email]@@>
00408297 .  68 1CA74200 PUSH FeeAVG.0042A71C                   ;  8866
0040829C .  8D4C24 1C    LEA ECX,DWORD PTR SS:[ESP+1C]
004082A0 .  50          PUSH EAX
004082A1 .  51          PUSH ECX
004082A2 .  C68424 0C0100>MOV BYTE PTR SS:[ESP+10C],4
004082AA .  E8 4D590100 CALL <[email=JMP.&MFC42.#924_??H@YG?AVCString]JMP.&MFC42.#924_??H@YG?AVCString[/email]@@>
004082AF .  50          PUSH EAX
004082B0 .  8D4C24 2C    LEA ECX,DWORD PTR SS:[ESP+2C]
004082B4 .  C68424 040100>MOV BYTE PTR SS:[ESP+104],5
004082BC .  E8 05590100 CALL <[email=JMP.&MFC42.#858_??4CString@@QAEABV]JMP.&MFC42.#858_??4CString@@QAEABV[/email]>
004082C1 .  8D4C24 18    LEA ECX,DWORD PTR SS:[ESP+18]
004082C5 .  C68424 000100>MOV BYTE PTR SS:[ESP+100],4
004082CD .  E8 64580100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
004082D2 .  8D4C24 20    LEA ECX,DWORD PTR SS:[ESP+20]
004082D6 .  889C24 000100>MOV BYTE PTR SS:[ESP+100],BL
004082DD .  E8 54580100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
004082E2 .  8B16       MOV EDX,DWORD PTR DS:[ESI]
004082E4 .  8BCE       MOV ECX,ESI
004082E6 .  FF52 0C    CALL DWORD PTR DS:[EDX+C]
004082E9 .  8B4424 28    MOV EAX,DWORD PTR SS:[ESP+28]          ;  机器码与上面字符相连GooD＋3CB84E02＋8866
004082ED .  8B16       MOV EDX,DWORD PTR DS:[ESI]
004082EF .  8B48 F8    MOV ECX,DWORD PTR DS:[EAX-8]
004082F2 .  51          PUSH ECX
004082F3 .  50          PUSH EAX                               ;  上面字符串入栈，作后面的运算准备～～
004082F4 .  8BCE       MOV ECX,ESI
004082F6 .  FF52 04    CALL DWORD PTR DS:[EDX+4]
004082F9 .  8B06       MOV EAX,DWORD PTR DS:[ESI]
004082FB .  8D4C24 30    LEA ECX,DWORD PTR SS:[ESP+30]
004082FF .  51          PUSH ECX
00408300 .  8BCE       MOV ECX,ESI
00408302 .  FF50 08    CALL DWORD PTR DS:[EAX+8]
00408305 .  C64424 74 00  MOV BYTE PTR SS:[ESP+74],0
0040830A .  B9 20000000 MOV ECX,20
0040830F .  33C0       XOR EAX,EAX
00408311 .  8D7C24 75    LEA EDI,DWORD PTR SS:[ESP+75]
00408315 .  8D5424 74    LEA EDX,DWORD PTR SS:[ESP+74]
00408319 .  F3:AB       REP STOS DWORD PTR ES:[EDI]
0040831B .  52          PUSH EDX
0040831C .  8D4424 34    LEA EAX,DWORD PTR SS:[ESP+34]
00408320 .  6A 10       PUSH 10
00408322 .  50          PUSH EAX
00408323 .  E8 48FEFFFF CALL FeeAVG.00408170                   ;  算法CallF7进入
00408328 .  8B5424 1C    MOV EDX,DWORD PTR SS:[ESP+1C]          ;  假码
0040832C .  8D8C24 800000>LEA ECX,DWORD PTR SS:[ESP+80]          ;  真码
00408333 .  51          PUSH ECX                               ; /s2
00408334 .  52          PUSH EDX                               ; |s1
00408335 .  FF15 E4264200 CALL DWORD PTR DS:[<&MSVCRT._mbscmp>] ; \_mbscmp
0040833B .  83C4 14    ADD ESP,14
0040833E .  85C0       TEST EAX,EAX
00408340    0F85 02010000 JNZ FeeAVG.00408448                   ;  关键跳，爆破点
00408346 .  8D4424 14    LEA EAX,DWORD PTR SS:[ESP+14]
0040834A .  8D4C24 24    LEA ECX,DWORD PTR SS:[ESP+24]
0040834E .  50          PUSH EAX
0040834F .  68 00A74200 PUSH FeeAVG.0042A700                   ;  update regsoft set rname ='
00408354 .  51          PUSH ECX
00408355 .  E8 BA580100 CALL <[email=JMP.&MFC42.#926_??H@YG?AVCString]JMP.&MFC42.#926_??H@YG?AVCString[/email]@@>
0040835A .  68 F4A64200 PUSH FeeAVG.0042A6F4                   ;  ', rpwd='
0040835F .  8D5424 30    LEA EDX,DWORD PTR SS:[ESP+30]
00408363 .  50          PUSH EAX
00408364 .  52          PUSH EDX
00408365 .  C68424 0C0100>MOV BYTE PTR SS:[ESP+10C],6
0040836D .  E8 8A580100 CALL <[email=JMP.&MFC42.#924_??H@YG?AVCString]JMP.&MFC42.#924_??H@YG?AVCString[/email]@@>
00408372 .  8D4C24 10    LEA ECX,DWORD PTR SS:[ESP+10]
00408376 .  8D5424 18    LEA EDX,DWORD PTR SS:[ESP+18]
0040837A .  51          PUSH ECX
0040837B .  50          PUSH EAX
0040837C .  52          PUSH EDX
0040837D .  C68424 0C0100>MOV BYTE PTR SS:[ESP+10C],7
00408385 .  E8 6C580100 CALL <[email=JMP.&MFC42.#922_??H@YG?AVCString]JMP.&MFC42.#922_??H@YG?AVCString[/email]@@>
0040838A .  68 E4A64200 PUSH FeeAVG.0042A6E4                   ;  '  where id =1
0040838F .  50          PUSH EAX
00408390 .  8D4424 28    LEA EAX,DWORD PTR SS:[ESP+28]
00408394 .  C68424 080100>MOV BYTE PTR SS:[ESP+108],8
0040839C .  50          PUSH EAX
0040839D .  E8 5A580100 CALL <[email=JMP.&MFC42.#924_??H@YG?AVCString]JMP.&MFC42.#924_??H@YG?AVCString[/email]@@>
004083A2 .  50          PUSH EAX
004083A3 .  8D4C24 20    LEA ECX,DWORD PTR SS:[ESP+20]
004083A7 .  C68424 040100>MOV BYTE PTR SS:[ESP+104],9
004083AF .  E8 12580100 CALL <[email=JMP.&MFC42.#858_??4CString@@QAEABV]JMP.&MFC42.#858_??4CString@@QAEABV[/email]>
004083B4 .  8D4C24 20    LEA ECX,DWORD PTR SS:[ESP+20]
004083B8 .  C68424 000100>MOV BYTE PTR SS:[ESP+100],8
004083C0 .  E8 71570100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
004083C5 .  8D4C24 18    LEA ECX,DWORD PTR SS:[ESP+18]
004083C9 .  C68424 000100>MOV BYTE PTR SS:[ESP+100],7
004083D1 .  E8 60570100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
004083D6 .  8D4C24 2C    LEA ECX,DWORD PTR SS:[ESP+2C]
004083DA .  C68424 000100>MOV BYTE PTR SS:[ESP+100],6
004083E2 .  E8 4F570100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
004083E7 .  8D4C24 24    LEA ECX,DWORD PTR SS:[ESP+24]
004083EB .  889C24 000100>MOV BYTE PTR SS:[ESP+100],BL
004083F2 .  E8 3F570100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
004083F7 .  6A 01       PUSH 1
004083F9 .  6A 00       PUSH 0
004083FB .  8D4C24 24    LEA ECX,DWORD PTR SS:[ESP+24]
004083FF .  E8 FCA5FFFF CALL FeeAVG.00402A00
00408404 .  51          PUSH ECX
00408405 .  8BCC       MOV ECX,ESP
00408407 .  896424 38    MOV DWORD PTR SS:[ESP+38],ESP
0040840B .  50          PUSH EAX
0040840C .  E8 CFC3FFFF CALL FeeAVG.004047E0
00408411 .  8D4C24 30    LEA ECX,DWORD PTR SS:[ESP+30]
00408415 .  889C24 0C0100>MOV BYTE PTR SS:[ESP+10C],BL
0040841C .  51          PUSH ECX
0040841D .  8D8D F0000000 LEA ECX,DWORD PTR SS:[EBP+F0]
00408423 .  E8 E8C2FFFF CALL FeeAVG.00404710
00408428 .  8BC8       MOV ECX,EAX
0040842A .  E8 A1C6FFFF CALL FeeAVG.00404AD0
0040842F .  8B4424 24    MOV EAX,DWORD PTR SS:[ESP+24]
00408433 .  85C0       TEST EAX,EAX
00408435 .  74 06       JE SHORT FeeAVG.0040843D
00408437 .  8B10       MOV EDX,DWORD PTR DS:[EAX]
00408439 .  50          PUSH EAX
0040843A .  FF52 08    CALL DWORD PTR DS:[EDX+8]
0040843D >  6A 00       PUSH 0
0040843F .  6A 00       PUSH 0
00408441 .  68 C4A64200 PUSH FeeAVG.0042A6C4                   ;  谢谢您的使用，你的软件已注册!
00408446 .  EB 09       JMP SHORT FeeAVG.00408451
00408448 >  6A 00       PUSH 0
0040844A .  6A 00       PUSH 0
0040844C .  68 ACA64200 PUSH FeeAVG.0042A6AC                   ;  注册码错误，请重新注册!
00408451 >  E8 AC570100 CALL <[email=JMP.&MFC42.#1200_?AfxMessageBox@@Y]JMP.&MFC42.#1200_?AfxMessageBox@@Y[/email]>
00408456 .  8D4C24 1C    LEA ECX,DWORD PTR SS:[ESP+1C]
0040845A .  C68424 000100>MOV BYTE PTR SS:[ESP+100],2
00408462 .  E8 CF560100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>
00408467 .  8D4C24 28    LEA ECX,DWORD PTR SS:[ESP+28]
0040846B .  C68424 000100>MOV BYTE PTR SS:[ESP+100],1
00408473 .  E8 BE560100 CALL <[email=JMP.&MFC42.#800_??1CString@@QAE@XZ]JMP.&MFC42.#800_??1CString@@QAE@XZ[/email]>

----------------------------------------------------------------------
算法CALL：
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
00408170  /$  8B4424 08    MOV EAX,DWORD PTR SS:[ESP+8]
00408174  |.  53          PUSH EBX
00408175  |.  8B5C24 08    MOV EBX,DWORD PTR SS:[ESP+8]
00408179  |.  55          PUSH EBP
0040817A  |.  8B6C24 14    MOV EBP,DWORD PTR SS:[ESP+14]
0040817E  |.  85C0       TEST EAX,EAX
00408180  |.  C645 00 00 MOV BYTE PTR SS:[EBP],0
00408184  |.  7E 4D       JLE SHORT FeeAVG.004081D3
00408186  |.  56          PUSH ESI
00408187  |.  57          PUSH EDI
00408188  |.  894424 1C    MOV DWORD PTR SS:[ESP+1C],EAX
0040818C  |>  8A0B       /MOV CL,BYTE PTR DS:[EBX]
0040818E  |.  8D4424 14    |LEA EAX,DWORD PTR SS:[ESP+14]          //循环
00408192  |.  50          |PUSH EAX
00408193  |.  51          |PUSH ECX
00408194  |.  E8 A7FFFFFF |CALL FeeAVG.00408140                   ;  MD5运算结果转大写
00408199  |.  8D7C24 1C    |LEA EDI,DWORD PTR SS:[ESP+1C]
0040819D  |.  83C9 FF    |OR ECX,FFFFFFFF
004081A0  |.  33C0       |XOR EAX,EAX
004081A2  |.  83C4 08    |ADD ESP,8
004081A5  |.  F2:AE       |REPNE SCAS BYTE PTR ES:[EDI]
004081A7  |.  F7D1       |NOT ECX
004081A9  |.  2BF9       |SUB EDI,ECX
004081AB  |.  8BF7       |MOV ESI,EDI
004081AD  |.  8BD1       |MOV EDX,ECX
004081AF  |.  8BFD       |MOV EDI,EBP
004081B1  |.  83C9 FF    |OR ECX,FFFFFFFF
004081B4  |.  F2:AE       |REPNE SCAS BYTE PTR ES:[EDI]
004081B6  |.  8BCA       |MOV ECX,EDX
004081B8  |.  4F          |DEC EDI
004081B9  |.  C1E9 02    |SHR ECX,2
004081BC  |.  F3:A5       |REP MOVS DWORD PTR ES:[EDI],DWORD PTR D>
004081BE  |.  8B4424 1C    |MOV EAX,DWORD PTR SS:[ESP+1C]
004081C2  |.  8BCA       |MOV ECX,EDX
004081C4  |.  83E1 03    |AND ECX,3
004081C7  |.  43          |INC EBX
004081C8  |.  48          |DEC EAX
004081C9  |.  F3:A4       |REP MOVS BYTE PTR ES:[EDI],BYTE PTR DS:>
004081CB  |.  894424 1C    |MOV DWORD PTR SS:[ESP+1C],EAX
004081CF  |.^ 75 BB       \JNZ SHORT FeeAVG.0040818C
004081D1  |.  5F          POP EDI
004081D2  |.  5E          POP ESI
004081D3  |>  5D          POP EBP
004081D4  |.  5B          POP EBX
004081D5  \.  C3          RETN
------------------------------------------------------------------------
【破解总结】这个软件很适合初学算的人（像我这样的），简单的MD5运算结果就是注册码，没有其它的。算法很简单。而且，软件也没有重启验证～～
高手不要笑我，我就这个水平了～～^_^  算是算法入门的一个参考吧、、、、
------------------------------------------------------------------------
【版权声明】本破文纯属技术交流, 转载请注明作者并保持文章的完整, 谢谢!天道酬勤！

月之精灵 · 发表于 2007-3-14 16:32:46

不错，不错

风飘雪 · 发表于 2007-3-14 18:15:03

很不错的密码学算法加精鼓励 good到底是大写还是小写
没表达清楚

qq500com · 发表于 2007-3-14 18:17:43

向楼主学习！！！！

00408194 |. E8 A7FFFFFF |CALL FeeAVG.00408140 ; MD5运算结果转大写

请问上面这行是怎样知道是（MD5运算结果转大写）的？？？

MD5运算结果转大写
BD60D7B5FBE1252E58A0CAC3DA84727A

请问怎样转大写？？

[ 本帖最后由 qq500com 于 2007-3-14 22:10 编辑 ]

极速暴龙 · 发表于 2007-3-14 18:49:14

原帖由 qq500com 于 2007-3-14 18:17 发表
向楼主学习！！！！

00408194 |. E8 A7FFFFFF |CALL FeeAVG.00408140 ; MD5运算结果转大写

请问上面这行是怎样知道是（MD5运算结果转大写）的？？？

应该是"事实证明":lol:

还有哪个才是算法Call啊?

[ 本帖最后由极速暴龙于 2007-3-14 18:51 编辑 ]

qq500com · 发表于 2007-3-14 21:48:24

00408323 .  E8 48FEFFFF CALL FeeAVG.00408170                   ;  算法CallF7进入
00408328 .  8B5424 1C    MOV EDX,DWORD PTR SS:[ESP+1C]          ;  假码
0040832C .  8D8C24 800000>LEA ECX,DWORD PTR SS:[ESP+80]          ;  真码
00408333 .  51          PUSH ECX                               ; /s2
00408334 .  52          PUSH EDX                               ; |s1
00408335 .  FF15 E4264200 CALL DWORD PTR DS:[<&MSVCRT._mbscmp>] ; \_mbscmp

上面有两个 CALL  怎么知道是第一个CALL 有什么技术，可以分享一下吗？很想学算法，

看见好多代码，就是不知道是那个关键CALL。

[ 本帖最后由 qq500com 于 2007-3-14 21:59 编辑 ]

playboyjin · 发表于 2007-3-14 22:21:40

good在字符串中为小写，是后来与机器码结合时转换的，，关于哪个是算法CALL。有一种最好的也是最笨的方法，那就是一个一个的找:lol: :lol: 不过，如果分析多了，会有一种感觉的，:$

qq500com · 发表于 2007-3-14 22:41:38

good在字符串中为小写，是后来与机器码结合时转换的，，关于哪个是算法CALL。有一种最好的也是最笨的方法，那就是一个一个的找不过，如果分析多了，会有一种感觉的，
谢谢！！！！
是不是这样的啊？？？？

[ 本帖最后由 qq500com 于 2007-3-14 22:42 编辑 ]

jasonliyi · 发表于 2007-3-14 22:43:57

学习.学习..

qq500com · 发表于 2007-3-14 22:44:29

MD5 大
MD5 小

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[原创] AA制费用分摊 1.21简单MD5算法分析(超级简单！)

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