查找汉字笔画 V1.1 算法分析

下载页面：http://gaoasp.nease.net/doc/hzbh.htm

软件大小：538K

运行环境：Windows 9x/NT/2000

【软件简介】：可查找任一汉字或一段汉字的笔画，功能经扩展后可用于教学、娱乐、文字处理等领域，如儿童识字、笔画算命以及需要按笔画排序处理等方面的应用

【软件限制】：NAG

【作者声明】：初学Crack，只是感兴趣，没有其它目的。失误之处敬请诸位大侠赐教！

【破解工具】：TRW2000娃娃修改版、Ollydbg1.09、PEiD、W32Dasm 9.0白金版

—————————————————————————————————

【过 程】：

hzbh.exe 无壳。Visual C++ 6.0 编写。

用户名：FLY

试炼码：13572468

反汇编，根据出错提示很容易就找到核心了。

—————————————————————————————————

:004025B1 E8D60C0000 Call 0040328C

:004025B6 8D442424 lea eax, dword ptr [esp+24]

:004025BA 8D4C2418 lea ecx, dword ptr [esp+18]

:004025BE 50 push eax

:004025BF 51 push ecx

:004025C0 57 push edi

:004025C1 683F000F00 push 000F003F

:004025C6 57 push edi

* Possible StringData Ref from Data Obj ->"REG_SZ"

|

:004025C7 6814CA4000 push 0040CA14

:004025CC 57 push edi

* Possible StringData Ref from Data Obj ->"SOFTWARE\HZBH"

|

:004025CD 6804CA4000 push 0040CA04

:004025D2 6802000080 push 80000002

:004025D7 C644245801 mov [esp+58], 01

:004025DC C7442448FF000000 mov [esp+48], 000000FF

:004025E4 897C2440 mov dword ptr [esp+40], edi

* Reference To: ADVAPI32.RegCreateKeyExA, Ord:015Fh

|

:004025E8 FF1500404000 Call dword ptr [00404000]

:004025EE 3BC7 cmp eax, edi

:004025F0 0F854C010000 jne 00402742

:004025F6 8D542410 lea edx, dword ptr [esp+10]

:004025FA 8BCE mov ecx, esi

:004025FC 52 push edx

:004025FD 68F1030000 push 000003F1

* Reference To: MFC42.Ordinal:0C19, Ord:0C19h

|

:00402602 E8E50C0000 Call 004032EC

:00402607 8D442414 lea eax, dword ptr [esp+14]

:0040260B 8BCE mov ecx, esi

:0040260D 50 push eax

:0040260E 68F2030000 push 000003F2

* Reference To: MFC42.Ordinal:0C19, Ord:0C19h

|

:00402613 E8D40C0000 Call 004032EC

:00402618 8D4C2410 lea ecx, dword ptr [esp+10]

* Reference To: MFC42.Ordinal:188A, Ord:188Ah

|

:0040261C E80D0D0000 Call 0040332E

:00402621 8D4C2410 lea ecx, dword ptr [esp+10]

* Reference To: MFC42.Ordinal:188B, Ord:188Bh

|

:00402625 E8FE0C0000 Call 00403328

:0040262A 8D4C2414 lea ecx, dword ptr [esp+14]

* Reference To: MFC42.Ordinal:188A, Ord:188Ah

|

:0040262E E8FB0C0000 Call 0040332E

:00402633 8D4C2414 lea ecx, dword ptr [esp+14]

* Reference To: MFC42.Ordinal:188B, Ord:188Bh

|

:00402637 E8EC0C0000 Call 00403328

:0040263C 8D4C2410 lea ecx, dword ptr [esp+10]

* Reference To: MFC42.Ordinal:106A, Ord:106Ah

|

:00402640 E8DD0C0000 Call 00403322

====>把用户名转换成小写字母

:00402645 8B4C2410 mov ecx, dword ptr [esp+10]

====>ECX=fly 呵呵，取用户名的小写字母运算

:00402649 8B542414 mov edx, dword ptr [esp+14]

====>EDX=13572468

:0040264D 8B79F8 mov edi, dword ptr [ecx-08]

====>EDI=3 用户名长度

:00402650 8B6AF8 mov ebp, dword ptr [edx-08]

====>EBP=8 试炼码长度

:00402653 47 inc edi

:00402654 8D4C2410 lea ecx, dword ptr [esp+10]

:00402658 57 push edi

:00402659 45 inc ebp

* Reference To: MFC42.Ordinal:0B63, Ord:0B63h

|

:0040265A E8BD0C0000 Call 0040331C

:0040265F 55 push ebp

:00402660 8D4C2418 lea ecx, dword ptr [esp+18]

:00402664 89442424 mov dword ptr [esp+24], eax

* Reference To: MFC42.Ordinal:0B63, Ord:0B63h

|

:00402668 E8AF0C0000 Call 0040331C

:0040266D 8BD8 mov ebx, eax

:0040266F 8D4FFF lea ecx, dword ptr [edi-01]

:00402672 33C0 xor eax, eax

:00402674 895C2428 mov dword ptr [esp+28], ebx

:00402678 85C9 test ecx, ecx

:0040267A 761C jbe 00402698

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00402692(C)

|

:0040267C 8B5C2420 mov ebx, dword ptr [esp+20]

====>EBX=[esp+20]=fly

:00402680 33D2 xor edx, edx

:00402682 8A1418 mov dl, byte ptr [eax+ebx]

====>依次取fly字符的HEX值

1、 ====>DL=66

2、 ====>DL=6C

3、 ====>DL=79

:00402685 8B5C241C mov ebx, dword ptr [esp+1C]

:00402689 03DA add ebx, edx

1、 ====>EDX=66 + 00=66

2、 ====>EDX=6C + 66=D2

3、 ====>EDX=79 + D2=14B

:0040268B 40 inc eax

:0040268C 3BC1 cmp eax, ecx

:0040268E 895C241C mov dword ptr [esp+1C], ebx

:00402692 72E8 jb 0040267C

====>循环累加用户名字符的HEX值

:00402694 8B5C2428 mov ebx, dword ptr [esp+28]

====>EBX=13572468

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:0040267A(C)

|

:00402698 53 push ebx

* Reference To: MSVCRT.atol, Ord:023Eh

|

:00402699 FF1578424000 Call dword ptr [00404278]

====>求13572468的16进制值：EAX=00CF1974

:0040269F 8B4C2420 mov ecx, dword ptr [esp+20]

====>ECX=0000014B

:004026A3 83C404 add esp, 00000004

:004026A6 3BC8 cmp ecx, eax

====>比较了！

====>ECX=0000014B 用户名字符HEX值累加的结果

====>EAX=00CF1974 试炼码的16进制值

:004026A8 7577 jne 00402721

====>跳则OVER！ 爆破点 ①

:004026AA 83FF01 cmp edi, 00000001

====>用户名长度要至少1位

:004026AD 7672 jbe 00402721

====>跳则OVER！ 爆破点 ②

:004026AF 83FD01 cmp ebp, 00000001

====>注册码长度要至少1位

:004026B2 766D jbe 00402721

====>跳则OVER！ 爆破点 ②

:004026B4 8B442420 mov eax, dword ptr [esp+20]

:004026B8 8B4C2418 mov ecx, dword ptr [esp+18]

:004026BC 57 push edi

* Reference To: ADVAPI32.RegSetvalueExA, Ord:0186h

|

:004026BD 8B3D08404000 mov edi, dword ptr [00404008]

:004026C3 50 push eax

:004026C4 6A01 push 00000001

:004026C6 6A00 push 00000000

====>下面保存注册信息

* Possible StringData Ref from Data Obj ->"UserName"

|

:004026C8 68F8C94000 push 0040C9F8

:004026CD 51 push ecx

:004026CE FFD7 call edi

:004026D0 8B542418 mov edx, dword ptr [esp+18]

:004026D4 55 push ebp

:004026D5 53 push ebx

:004026D6 6A01 push 00000001

:004026D8 6A00 push 00000000

* Possible StringData Ref from Data Obj ->"PassWord"

|

:004026DA 68ECC94000 push 0040C9EC

:004026DF 52 push edx

:004026E0 FFD7 call edi

:004026E2 8B442418 mov eax, dword ptr [esp+18]

:004026E6 50 push eax

* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh

|

:004026E7 FF150C404000 Call dword ptr [0040400C]

:004026ED 8B4E20 mov ecx, dword ptr [esi+20]

:004026F0 6A01 push 00000001

:004026F2 51 push ecx

* Reference To: USER32.KillTimer, Ord:0195h

|

:004026F3 FF15DC424000 Call dword ptr [004042DC]

:004026F9 6840100000 push 00001040

* Possible StringData Ref from Data Obj ->"注册信息"

|

:004026FE 6854CB4000 push 0040CB54

* Possible StringData Ref from Data Obj ->"您成功注册！"

====>呵呵，胜利女神！

:00402703 6844CB4000 push 0040CB44

:00402708 8BCE mov ecx, esi

* Reference To: MFC42.Ordinal:1080, Ord:1080h

|

:0040270A E8010C0000 Call 00403310

:0040270F 8B15ACCC4000 mov edx, dword ptr [0040CCAC]

:00402715 6A00 push 00000000

:00402717 8D4A64 lea ecx, dword ptr [edx+64]

* Reference To: MFC42.Ordinal:0A52, Ord:0A52h

|

:0040271A E8910B0000 Call 004032B0

:0040271F EB21 jmp 00402742

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:

|:004026A8(C), :004026AD(C), :004026B2(C)

|

:00402721 8B442418 mov eax, dword ptr [esp+18]

:00402725 50 push eax

* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh

|

:00402726 FF150C404000 Call dword ptr [0040400C]

:0040272C 6810100000 push 00001010

* Possible StringData Ref from Data Obj ->"注册信息"

|

:00402731 6854CB4000 push 0040CB54

* Possible StringData Ref from Data Obj ->"注册失败！"

====>BAD BOY！

:00402736 6838CB4000 push 0040CB38

:0040273B 8BCE mov ecx, esi

* Reference To: MFC42.Ordinal:1080, Ord:1080h

|

:0040273D E8CE0B0000 Call 00403310

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:

|:004025F0(C), :0040271F(U)

|

:00402742 8BCE mov ecx, esi

* Reference To: MFC42.Ordinal:12F5, Ord:12F5h

|

:00402744 E8470A0000 Call 00403190

:00402749 8D4C2414 lea ecx, dword ptr [esp+14]

:0040274D C644243400 mov [esp+34], 00

* Reference To: MFC42.Ordinal:0320, Ord:0320h

|

:00402752 E8150A0000 Call 0040316C

:00402757 8D4C2410 lea ecx, dword ptr [esp+10]

:0040275B C7442434FFFFFFFF mov [esp+34], FFFFFFFF

* Reference To: MFC42.Ordinal:0320, Ord:0320h

|

:00402763 E8040A0000 Call 0040316C

:00402768 8B4C242C mov ecx, dword ptr [esp+2C]

:0040276C 5F pop edi

:0040276D 5E pop esi

:0040276E 5D pop ebp

:0040276F 5B pop ebx

:00402770 64890D00000000 mov dword ptr fs:[00000000], ecx

:00402777 83C428 add esp, 00000028

:0040277A C3 ret

—————————————————————————————————

呵呵，程序在启动时还有校验。爆破顺手也就看看。

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:00402238(C)

|

:0040221F 33C0 xor eax, eax

:00402221 8D7C2420 lea edi, dword ptr [esp+20]

:00402225 8A441420 mov al, byte ptr [esp+edx+20]

:00402229 83C9FF or ecx, FFFFFFFF

:0040222C 03F0 add esi, eax

:0040222E 33C0 xor eax, eax

:00402230 42 inc edx

:00402231 F2 repnz

:00402232 AE scasb

:00402233 F7D1 not ecx

:00402235 49 dec ecx

:00402236 3BD1 cmp edx, ecx

:00402238 72E5 jb 0040221F

* Referenced by a (U)nconditional or (C)onditional Jump at Address:

|:0040221D(C)

|

:0040223A 8D4C2454 lea ecx, dword ptr [esp+54]

:0040223E 51 push ecx

* Reference To: MSVCRT.atol, Ord:023Eh

|

:0040223F FF1578424000 Call dword ptr [00404278]

:00402245 83C404 add esp, 00000004

:00402248 3BF0 cmp esi, eax

====>呵呵，再比较一次！

:0040224A 753A jne 00402286

:0040224C 8D7C2420 lea edi, dword ptr [esp+20]

:00402250 83C9FF or ecx, FFFFFFFF

:00402253 33C0 xor eax, eax

:00402255 F2 repnz

:00402256 AE scasb

:00402257 F7D1 not ecx

:00402259 49 dec ecx

:0040225A 83F901 cmp ecx, 00000001

====>呵呵，再比较一次！

:0040225D 7627 jbe 00402286

:0040225F 8D7C2454 lea edi, dword ptr [esp+54]

:00402263 83C9FF or ecx, FFFFFFFF

:00402266 F2 repnz

:00402267 AE scasb

:00402268 F7D1 not ecx

:0040226A 49 dec ecx

:0040226B 83F901 cmp ecx, 00000001

====>呵呵，再比较一次！

:0040226E 7616 jbe 00402286

:00402270 8B54240C mov edx, dword ptr [esp+0C]

:00402274 B301 mov bl, 01

====>置1则OK！

:00402276 52 push edx

* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh

|

:00402277 FF150C404000 Call dword ptr [0040400C]

:0040227D 5F pop edi

:0040227E 8AC3 mov al, bl

:00402280 5E pop esi

:00402281 5B pop ebx

:00402282 83C47C add esp, 0000007C

:00402285 C3 ret

* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:

|:0040224A(C), :0040225D(C), :0040226E(C)

|

:00402286 8B54240C mov edx, dword ptr [esp+0C]

:0040228A 32DB xor bl, bl

====>清0则OVER！呵呵， 爆破点 ④

:0040228C 52 push edx

* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh

|

:0040228D FF150C404000 Call dword ptr [0040400C]

:00402293 5F pop edi

:00402294 8AC3 mov al, bl

:00402296 5E pop esi

:00402297 5B pop ebx

:00402298 83C47C add esp, 0000007C

:0040229B C3 ret

—————————————————————————————————

【算 法 总 结】：

1、用户名和注册码长度要至少1位。

2、用户名字符HEX值累加的之和应等于注册码数字的HEX值

简单求逆：

fly=66 + 6C + 79=14B

14B（H）=331（D）

呵呵，所以我的注册码就是331

—————————————————————————————————

【完 美 爆 破】：

1、004026A8 7577 jne 00402721

改为： 9090 NOP掉

2、004026AD 7672 jbe 00402721

改为： 9090 NOP掉

3、004026B2 766D jbe 00402721

改为： 9090 NOP掉

4、0040228A 32DB xor bl, bl

改为： B301 mov bl, 01

—————————————————————————————————

【KeyMake之{64th}内存注册机】：

中断地址：4026A6

中断次数：1

第一字节：3B

指令长度：2

寄存器方式：ECX

十进制

—————————————————————————————————

【注册信息保存】：

REGEDIT4

[HKEY_LOCAL_MACHINE\Software\HZBH]

"UserName"="fly"

"PassWord"="331"

—————————————————————————————————

【整 理】：

用户名：FLY

注册码：331

—————————————————————————————————

Cracked By 巢水工作坊——fly [OCN][FCG]

2003-4-18 15:30

（出处：赢政天下整理收藏）

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