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HappyTown的第28个CrackMe算法分析.txt

2006-10-26 20:02 5957

HappyTown的第28个CrackMe算法分析.txt

hbqjxhw

2006-10-26 20:02

5957

【破文作者】 hbqjxhw

【文章题目】 HappyTown的第28个CrackMe分析

【下载地址】 http://bbs.pediy.com/showthread.php?threadid=33861

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【破解平台】 XP SP2

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【破解过程】

00401068 > \56          PUSH ESI                               ;  Case 1 of switch 00401048
00401069 .  8B7424 08    MOV ESI,DWORD PTR SS:[ESP+8]
0040106D .  68 E9030000 PUSH 3E9                               ; /ControlID = 3E9 (1001.)
00401072 .  56          PUSH ESI                               ; |hWnd
00401073 .  FF15 C4804000 CALL DWORD PTR DS:[<&USER32.GetDlgItem>] ; \GetDlgItem
00401079 .  50          PUSH EAX                               ; /hWnd
0040107A .  FF15 C8804000 CALL DWORD PTR DS:[<&USER32.SetFocus>] ; \SetFocus
00401080 .  56          PUSH ESI
00401081 .  E8 AA000000 CALL CrackMe_.00401130                ;  这里是重要CALL
00401086 .  83C4 04    ADD ESP,4
00401089 .  85C0       TEST EAX,EAX
0040108B .  5E          POP ESI
0040108C .  0F84 8D000000 JE CrackMe_.0040111F                   ;  关键跳转。
00401092 .  6A 40       PUSH 40                               ; /Style = MB_OK|MB_ICONASTERISK|MB_APPLMODAL
00401094 .  68 C4904000 PUSH CrackMe_.004090C4                ; |congratulations
00401099 .  68 B4904000 PUSH CrackMe_.004090B4                ; |good job, man!
0040109E .  6A 00       PUSH 0                                  ; |hOwner = NULL
004010A0 .  FF15 CC804000 CALL DWORD PTR DS:[<&USER32.MessageBoxA>>; \MessageBoxA
004010A6 .  33C0       XOR EAX,EAX
004010A8 .  C2 1000    RETN 10
004010AB >  8B4424 04    MOV EAX,DWORD PTR SS:[ESP+4]          ;  Case 3EE of switch 00401048
004010AF .  6A 05       PUSH 5                                  ; /IsShown = 5
004010B1 .  6A 00       PUSH 0                                  ; |DefDir = NULL
004010B3 .  6A 00       PUSH 0                                  ; |Parameters = NULL
004010B5 .  68 9C904000 PUSH CrackMe_.0040909C                ; |mailto:wxr277@163.com
004010BA .  68 94904000 PUSH CrackMe_.00409094                ; |open
004010BF .  50          PUSH EAX                               ; |hWnd
004010C0 .  FF15 B4804000 CALL DWORD PTR DS:[<&SHELL32.ShellExecut>; \ShellExecuteA
004010C6 .  33C0       XOR EAX,EAX
004010C8 .  C2 1000    RETN 10
004010CB >  3D EF030000 CMP EAX,3EF
004010D0 .  75 4D       JNZ SHORT CrackMe_.0040111F
004010D2 .  6A 40       PUSH 40                               ; /Style = MB_OK|MB_ICONASTERISK|MB_APPLMODAL; Case 3EF

of switch 00401048
004010D4 .  68 90904000 PUSH CrackMe_.00409090                ; |^_^
004010D9 .  68 30904000 PUSH CrackMe_.00409030                ; |this is my 28th crackme,and\n\nprogrammed with

vc++6.0.\n\n    [happytown]\n\n\t       2006-10-24
004010DE .  6A 00       PUSH 0                                  ; |hOwner = NULL
004010E0 .  FF15 CC804000 CALL DWORD PTR DS:[<&USER32.MessageBoxA>>; \MessageBoxA
004010E6 .  33C0       XOR EAX,EAX
004010E8 .  C2 1000    RETN 10

---------------------CALL CrackMe_.00401130---------------------

00401130  /$  81EC D4000000 SUB ESP,0D4
00401136  |.  53          PUSH EBX
00401137  |.  55          PUSH EBP
00401138  |.  56          PUSH ESI
00401139  |.  57          PUSH EDI
0040113A  |.  B9 18000000 MOV ECX,18
0040113F  |.  33C0       XOR EAX,EAX
00401141  |.  8DBC24 810000>LEA EDI,DWORD PTR SS:[ESP+81]
00401148  |.  C68424 800000>MOV BYTE PTR SS:[ESP+80],0
00401150  |.  F3:AB       REP STOS DWORD PTR ES:[EDI]
00401152  |.  66:AB       STOS WORD PTR ES:[EDI]
00401154  |.  AA          STOS BYTE PTR ES:[EDI]
00401155  |.  B9 18000000 MOV ECX,18
0040115A  |.  33C0       XOR EAX,EAX
0040115C  |.  8D7C24 1D    LEA EDI,DWORD PTR SS:[ESP+1D]
00401160  |.  C64424 1C 00  MOV BYTE PTR SS:[ESP+1C],0
00401165  |.  F3:AB       REP STOS DWORD PTR ES:[EDI]
00401167  |.  66:AB       STOS WORD PTR ES:[EDI]
00401169  |.  6A 10       PUSH 10
0040116B  |.  68 20030000 PUSH 320
00401170  |.  33F6       XOR ESI,ESI
00401172  |.  AA          STOS BYTE PTR ES:[EDI]
00401173  |.  E8 98110000 CALL CrackMe_.00402310
00401178  |.  56          PUSH ESI
00401179  |.  C780 34020000>MOV DWORD PTR DS:[EAX+234],10
00401183  |.  E8 28100000 CALL CrackMe_.004021B0
00401188  |.  8B9C24 F40000>MOV EBX,DWORD PTR SS:[ESP+F4]
0040118F  |.  83C4 0C    ADD ESP,0C
00401192  |.  894424 14    MOV DWORD PTR SS:[ESP+14],EAX
00401196  |.  8D8424 800000>LEA EAX,DWORD PTR SS:[ESP+80]
0040119D  |.  6A 65       PUSH 65                               ; /Count = 65 (101.)
0040119F  |.  50          PUSH EAX                               ; |Buffer
004011A0  |.  68 E8030000 PUSH 3E8                               ; |ControlID = 3E8 (1000.)
004011A5  |.  53          PUSH EBX                               ; |hWnd
004011A6  |.  FF15 BC804000 CALL DWORD PTR DS:[<&USER32.GetDlgItemTe>; \GetDlgItemTextA
004011AC  |.  83F8 03    CMP EAX,3                               ;  比较用户名是否大于等于3位
004011AF  |.  0F82 27010000 JB CrackMe_.004012DC
004011B5  |.  83F8 23    CMP EAX,23                            ;  比较用户名是否小于等于35位
004011B8  |.  0F87 1E010000 JA CrackMe_.004012DC
004011BE  |.  33C9       XOR ECX,ECX
004011C0  |.  85C0       TEST EAX,EAX
004011C2  |.  76 10       JBE SHORT CrackMe_.004011D4
004011C4  |>  33D2       /XOR EDX,EDX
004011C6  |.  8A940C 800000>|MOV DL,BYTE PTR SS:[ESP+ECX+80]
004011CD  |.  03F2       |ADD ESI,EDX                            ;  ESI保存Name的HEX码之和
004011CF  |.  41          |INC ECX
004011D0  |.  3BC8       |CMP ECX,EAX
004011D2  |.^ 72 F0       \JB SHORT CrackMe_.004011C4
004011D4  |>  8BC6       MOV EAX,ESI
004011D6  |.  8DAE 89ABCDEF LEA EBP,DWORD PTR DS:[ESI+EFCDAB89]    ;  EBP值为HEX码之和+0xEFCDAB89
004011DC  |.  69F6 76543210 IMUL ESI,ESI,10325476                   ;  ESI值为HEX码之和*0x10325476
004011E2  |.  69C0 01234567 IMUL EAX,EAX,67452301                   ;  EAX值为HEX码之和*0x67452301
004011E8  |.  8BCE       MOV ECX,ESI
004011EA  |.  8BFD       MOV EDI,EBP
004011EC  |.  33C8       XOR ECX,EAX                            ;  ECX值为ESI与EAX异或
004011EE  |.  33F8       XOR EDI,EAX                            ;  ECX值为EBP与EAX异或
004011F0  |.  6A 05       PUSH 5                                  ;  常数0x5
004011F2  |.  51          PUSH ECX
004011F3  |.  33EF       XOR EBP,EDI
004011F5  |.  E8 F6000000 CALL CrackMe_.004012F0       ;  算法CALL1
004011FA  |.  6A 0D       PUSH 0D                               ;  常数0xD
004011FC  |.  57          PUSH EDI
004011FD  |.  894424 28    MOV DWORD PTR SS:[ESP+28],EAX
00401201  |.  D1E6       SHL ESI,1                      ;  ESI左移0x1
00401203  |.  E8 08010000 CALL CrackMe_.00401310       ;  算法CALL2
00401208  |.  6A 11       PUSH 11                               ;  常数0x11
0040120A  |.  55          PUSH EBP
0040120B  |.  894424 28    MOV DWORD PTR SS:[ESP+28],EAX
0040120F  |.  E8 DC000000 CALL CrackMe_.004012F0
00401214  |.  83C4 18    ADD ESP,18
00401217  |.  8D5424 1C    LEA EDX,DWORD PTR SS:[ESP+1C]
0040121B  |.  8BE8       MOV EBP,EAX
0040121D  |.  6A 65       PUSH 65                               ; /Count = 65 (101.)
0040121F  |.  52          PUSH EDX                               ; |Buffer
00401220  |.  68 E9030000 PUSH 3E9                               ; |ControlID = 3E9 (1001.)
00401225  |.  53          PUSH EBX                               ; |hWnd
00401226  |.  FF15 BC804000 CALL DWORD PTR DS:[<&USER32.GetDlgItemTe>; \GetDlgItemTextA
0040122C  |.  83F8 20    CMP EAX,20
0040122F  |.  0F85 A7000000 JNZ CrackMe_.004012DC
00401235  |.  8A4424 1C    MOV AL,BYTE PTR SS:[ESP+1C]
00401239  |.  84C0       TEST AL,AL
0040123B  |.  74 3F       JE SHORT CrackMe_.0040127C
0040123D  |.  8D7C24 1C    LEA EDI,DWORD PTR SS:[ESP+1C]
00401241  |>  833D 409F4000>/CMP DWORD PTR DS:[409F40],1
00401248  |.  7E 14       |JLE SHORT CrackMe_.0040125E
0040124A  |.  33C0       |XOR EAX,EAX
0040124C  |.  68 80000000 |PUSH 80
00401251  |.  8A07       |MOV AL,BYTE PTR DS:[EDI]
00401253  |.  50          |PUSH EAX
00401254  |.  E8 97280000 |CALL <CrackMe_.__isctype>
00401259  |.  83C4 08    |ADD ESP,8
0040125C  |.  EB 12       |JMP SHORT CrackMe_.00401270
0040125E  |>  8B15 349D4000 |MOV EDX,DWORD PTR DS:[409D34]          ;  CrackMe_.00409D3E
00401264  |.  33C9       |XOR ECX,ECX
00401266  |.  8A0F       |MOV CL,BYTE PTR DS:[EDI]
00401268  |.  8A044A       |MOV AL,BYTE PTR DS:[EDX+ECX*2]
0040126B  |.  25 80000000 |AND EAX,80
00401270  |>  85C0       |TEST EAX,EAX
00401272  |.  74 68       |JE SHORT CrackMe_.004012DC
00401274  |.  8A47 01    |MOV AL,BYTE PTR DS:[EDI+1]
00401277  |.  47          |INC EDI
00401278  |.  84C0       |TEST AL,AL
0040127A  |.^ 75 C5       \JNZ SHORT CrackMe_.00401241
0040127C  |>  8B5C24 14    MOV EBX,DWORD PTR SS:[ESP+14]
00401280  |.  8D4424 1C    LEA EAX,DWORD PTR SS:[ESP+1C]
00401284  |.  50          PUSH EAX
00401285  |.  53          PUSH EBX
00401286  |.  E8 75070000 CALL CrackMe_.00401A00
0040128B  |.  B9 19000000 MOV ECX,19
00401290  |.  33C0       XOR EAX,EAX
00401292  |.  8D7C24 24    LEA EDI,DWORD PTR SS:[ESP+24]
00401296  |.  50          PUSH EAX
00401297  |.  F3:AB       REP STOS DWORD PTR ES:[EDI]
00401299  |.  8D4C24 28    LEA ECX,DWORD PTR SS:[ESP+28]
0040129D  |.  51          PUSH ECX
0040129E  |.  53          PUSH EBX
0040129F  |.  50          PUSH EAX
004012A0  |.  E8 0B050000 CALL CrackMe_.004017B0
004012A5  |.  8B5424 30    MOV EDX,DWORD PTR SS:[ESP+30]
004012A9  |.  8B4424 34    MOV EAX,DWORD PTR SS:[ESP+34]
004012AD  |.  83C4 18    ADD ESP,18
004012B0  |.  3BC2       CMP EAX,EDX                            ;  下面几个都是比较
004012B2  |.  75 28       JNZ SHORT CrackMe_.004012DC
004012B4  |.  396C24 20    CMP DWORD PTR SS:[ESP+20],EBP
004012B8  |.  75 22       JNZ SHORT CrackMe_.004012DC
004012BA  |.  8B4424 10    MOV EAX,DWORD PTR SS:[ESP+10]
004012BE  |.  8B4C24 24    MOV ECX,DWORD PTR SS:[ESP+24]
004012C2  |.  3BC8       CMP ECX,EAX
004012C4  |.  75 16       JNZ SHORT CrackMe_.004012DC
004012C6  |.  397424 28    CMP DWORD PTR SS:[ESP+28],ESI
004012CA  |.  75 10       JNZ SHORT CrackMe_.004012DC
004012CC  |.  5F          POP EDI
004012CD  |.  5E          POP ESI
004012CE  |.  5D          POP EBP
004012CF  |.  B8 01000000 MOV EAX,1
004012D4  |.  5B          POP EBX
004012D5  |.  81C4 D4000000 ADD ESP,0D4
004012DB  |.  C3          RETN
004012DC  |>  5F          POP EDI
004012DD  |.  5E          POP ESI
004012DE  |.  5D          POP EBP
004012DF  |.  33C0       XOR EAX,EAX
004012E1  |.  5B          POP EBX
004012E2  |.  81C4 D4000000 ADD ESP,0D4
004012E8  \.  C3          RETN

---------------------CALL CrackMe_.004012F0---------------------
004012F0  /$  8B5424 04    MOV EDX,DWORD PTR SS:[ESP+4]
004012F4  |.  56          PUSH ESI
004012F5  |.  8B7424 0C    MOV ESI,DWORD PTR SS:[ESP+C]
004012F9  |.  B9 20000000 MOV ECX,20
004012FE  |.  2BCE       SUB ECX,ESI
00401300  |.  8BC2       MOV EAX,EDX
00401302  |.  D3E8       SHR EAX,CL
00401304  |.  8BCE       MOV ECX,ESI
00401306  |.  5E          POP ESI
00401307  |.  D3E2       SHL EDX,CL
00401309  |.  0BC2       OR EAX,EDX
0040130B  \.  C3          RETN

---------------------CALL CrackMe_.00401310---------------------
00401310  /$  8B5424 04    MOV EDX,DWORD PTR SS:[ESP+4]
00401314  |.  56          PUSH ESI
00401315  |.  8B7424 0C    MOV ESI,DWORD PTR SS:[ESP+C]
00401319  |.  B9 20000000 MOV ECX,20
0040131E  |.  2BCE       SUB ECX,ESI
00401320  |.  8BC2       MOV EAX,EDX
00401322  |.  D3E0       SHL EAX,CL
00401324  |.  8BCE       MOV ECX,ESI
00401326  |.  5E          POP ESI
00401327  |.  D3EA       SHR EDX,CL
00401329  |.  0BC2       OR EAX,EDX
0040132B  \.  C3          RETN

附上C程序代码：
#include "stdio.h"
#include "string.h"
#include <stdlib.h>

void main()
{ unsigned long a,b,c,d;
unsigned long sn1,sn2,sn3,sn4;
char serial1[9],serial2[9],serial3[9],serial4[9];
int len,num=0;
char str[50];
printf("请输入Name（大于等于3，小于等于35）:");
scanf("%s",str);
len=strlen(str);
for (int i=0;i<len;i++)
num+=str[i];
a=(num*0x10325476)^(num*0x67452301);
b=num*0x10325476;
c=(num+0xEFCDAB89)^(num*0x67452301);
d=num*0x67452301;
a=(a>>0x1B)|(a<<0x5);
b=b<<0x1;
c=(c<<0x13)|(c>>0xD);
d=(d>>0xf)|(d<<0x11);
sn1=(a<<0x18)|(a<<0x8&0xff0000)|(a>>0x8&0xff00)|(a>>0x18&0xff);
sn2=(d<<0x18)|(d<<0x8&0xff0000)|(d>>0x8&0xff00)|(d>>0x18&0xff);
sn3=(c<<0x18)|(c<<0x8&0xff0000)|(c>>0x8&0xff00)|(c>>0x18&0xff);
sn4=(b<<0x18)|(b<<0x8&0xff0000)|(b>>0x8&0xff00)|(b>>0x18&0xff);
ltoa(sn1,serial1,16);
ltoa(sn2,serial2,16);
ltoa(sn3,serial3,16);
ltoa(sn4,serial4,16);
printf("Serial:%s%s%s%s",serial1,serial2,serial3,serial4);
printf("\n");
getchar();
}

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【破解声明】我是一只小菜鸟，偶得一点心得，愿与大家分享:)

【版权声明】本文纯属技术交流, 转载请注明作者并保持文章的完整, 谢谢!
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                                                                              文章写于2006-10-26 19:40:12

[培训]科锐软件逆向50期预科班报名即将截止，速来！！！ 50期正式班报名火爆招生中！！！

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小剑雪币： 110 活跃值： (13) 能力值： ( LV2，RANK：10 ) 在线值：发帖 7 回帖 375 粉丝 1 关注私信	小剑 2006-10-26 22:47 2 楼 0 强，定一下
binbinbin 雪币： 405 活跃值： (10) 能力值： ( LV9，RANK：1130 ) 在线值：发帖 51 回帖 690 粉丝 0 关注私信	binbinbin 28 2006-10-27 08:20 3 楼 0 我连28都没有看到，算法就出来了。晕倒
happytown 雪币： 721 活跃值： (350) 能力值： ( LV9，RANK：1250 ) 在线值：发帖 132 回帖 1022 粉丝 1 关注私信	happytown 31 2006-10-31 11:25 4 楼 0 不错不错，鼓励一下。
hbqjxhw 雪币： 313 活跃值： (250) 能力值： ( LV9，RANK：650 ) 在线值：发帖 44 回帖 311 粉丝 0 关注私信	hbqjxhw 16 2006-10-31 16:44 5 楼 0 最初由 happytown* 发布* 不错不错，鼓励一下。谢谢鼓励
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小剑雪币： 110 活跃值： (13) 能力值： ( LV2，RANK：10 ) 在线值：发帖 7 回帖 375 粉丝 1 关注私信	小剑 2006-10-26 22:47 2 楼 0 强，定一下
binbinbin 雪币： 405 活跃值： (10) 能力值： ( LV9，RANK：1130 ) 在线值：发帖 51 回帖 690 粉丝 0 关注私信	binbinbin 28 2006-10-27 08:20 3 楼 0 我连28都没有看到，算法就出来了。晕倒
happytown 雪币： 721 活跃值： (350) 能力值： ( LV9，RANK：1250 ) 在线值：发帖 132 回帖 1022 粉丝 1 关注私信	happytown 31 2006-10-31 11:25 4 楼 0 不错不错，鼓励一下。
hbqjxhw 雪币： 313 活跃值： (250) 能力值： ( LV9，RANK：650 ) 在线值：发帖 44 回帖 311 粉丝 0 关注私信	hbqjxhw 16 2006-10-31 16:44 5 楼 0 最初由 happytown* 发布* 不错不错，鼓励一下。谢谢鼓励
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