＝＝＝＝＝Open Cracking Group＝＝＝＝＝＝
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＝
＝Registry Crawler 4.0注册码算法分析
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＝ CrAcKeD BY alphakk/OCG
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＝软件简介: ＝
＝ Registry Crawler 是强大的用户和开发者快速定位并配置注册表的工具软 ＝
＝件。一个强大的搜索引擎允许你基于搜索标准查找注册信息。允许你单击超链 ＝
＝接显示条目。支持书签功能，可在注册表中的任何键中添加书签并直接从系统 ＝
＝托盘读取。此特征允许你访问你经常存取的注册键而无需手工打开 REGEDIT。 ＝
＝每天需要操作注册表的用户会发现 Registry Crawler 是一个节约时间的工具。＝
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破解工具：SOFTICE，W32DASM
分析：
本软件采用用户名，注册码的验证方式，不注册的话会有30天的试用期，过期会提示用户注册，还未注册的话，将不能继续使用。
此软件无功能限制。
在注册窗口中输入以下信息：
用户名：alphakk/OCG
注册码：98765432
用GETWINDOWTEXT作断点，点击“解锁”，被SOFTICE中断，接着按F11跳出GETWINDOWTEXT函数，来到：
* Reference To: USER32.GetWindowTextA, Ord:015Eh
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:0042DA07 FF1550844400 Call dword ptr [00448450]
:0042DA0D EB12 jmp 0042DA21 <<-------按F11后来到的地方
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0042D9FA(C)
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:0042DA0F FF742408 push [esp+08]
:0042DA13 8B10 mov edx, dword ptr [eax]
:0042DA15 8BC8 mov ecx, eax
:0042DA17 FF742408 push [esp+08]
:0042DA1B FF9284000000 call dword ptr [edx+00000084]
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0042DA0D(U)
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:0042DA21 C20800 ret 0008
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝F10单步跟踪过上面后，来到：
* Possible Reference to Dialog:
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:0040AFDC 6810E54500 push 0045E510
:0040AFE1 8D8EBC030000 lea ecx, dword ptr [esi+000003BC]
:0040AFE7 E8092A0200 call 0042D9F5
:0040AFEC 68FF000000 push 000000FF
* Possible Reference to Dialog:
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:0040AFF1 6810E64500 push 0045E610 <<-----输入的注册码入栈
:0040AFF6 8D8E80030000 lea ecx, dword ptr [esi+00000380]
:0040AFFC E8F4290200 call 0042D9F5
* Possible Reference to Dialog:
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:0040B001 6810E54500 push 0045E510 <<------用户名入栈
:0040B006 8D4C240C lea ecx, dword ptr [esp+0C]
:0040B00A E8F6330200 call 0042E405
:0040B00F 8B00 mov eax, dword ptr [eax] <<------用户名首地址－＞EAX
* Possible Reference to Dialog:
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:0040B011 68848C4500 push 00458C84 <<------“TRIAL USER”入栈
:0040B016 50 push eax <<------用户名入栈
:0040B017 E8BFE60000 call 004196DB <<------比较函数，不同则EAX＝1
:0040B01C 83C408 add esp, 00000008
:0040B01F 8D4C2408 lea ecx, dword ptr [esp+08]
:0040B023 85C0 test eax, eax
:0040B025 0F94C3 sete bl <<------BL置0
:0040B028 E86A330200 call 0042E397
:0040B02D 84DB test bl, bl
:0040B02F 740F je 0040B040 <<------跳
:0040B031 6A01 push 00000001
:0040B033 8BCE mov ecx, esi
:0040B035 E8DB3F0200 call 0042F015
:0040B03A 5E pop esi
:0040B03B 5B pop ebx
:0040B03C 83C408 add esp, 00000008
:0040B03F C3 ret
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040B02F(C)
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:0040B040 E8ABFCFFFF call 0040ACF0 <<-----注意这个CALL，此处先用F10带过
:0040B045 85C0 test eax, eax
:0040B047 0F849D000000 je 0040B0EA <<-------上面的CALL用F10过的话，这里就会跳
* Possible StringData Ref from Data Obj ->"Software\4Developers\RCrawler"
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:0040B04D 8B15F88A4500 mov edx, dword ptr [00458AF8]
:0040B053 8D44240C lea eax, dword ptr [esp+0C]
:0040B057 8D4C2408 lea ecx, dword ptr [esp+08]
:0040B05B 33DB xor ebx, ebx
:0040B05D 50 push eax
:0040B05E 51 push ecx
:0040B05F 53 push ebx
:0040B060 683F000F00 push 000F003F
:0040B065 53 push ebx
:0040B066 53 push ebx
:0040B067 53 push ebx
:0040B068 52 push edx
:0040B069 6802000080 push 80000002
:0040B06E 895C2430 mov dword ptr [esp+30], ebx
:0040B072 895C242C mov dword ptr [esp+2C], ebx
* Reference To: ADVAPI32.RegCreateKeyExA, Ord:015Fh
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:0040B076 FF1534804400 Call dword ptr [00448034]
:0040B07C 3BC3 cmp eax, ebx
:0040B07E 7531 jne 0040B0B1
* Possible StringData Ref from Data Obj ->"4D"
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:0040B080 A1048B4500 mov eax, dword ptr [00458B04]
:0040B085 8B4C2408 mov ecx, dword ptr [esp+08]
:0040B089 57 push edi
:0040B08A 6800020000 push 00000200
:0040B08F 6810E54500 push 0045E510
:0040B094 6A03 push 00000003
:0040B096 53 push ebx
:0040B097 50 push eax
:0040B098 51 push ecx
* Reference To: ADVAPI32.RegSetvalueExA, Ord:0186h
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:0040B099 FF1524804400 Call dword ptr [00448024]
:0040B09F 8B54240C mov edx, dword ptr [esp+0C]
:0040B0A3 8BF8 mov edi, eax
:0040B0A5 52 push edx
* Reference To: ADVAPI32.RegCloseKey, Ord:015Bh
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:0040B0A6 FF1520804400 Call dword ptr [00448020]
:0040B0AC 3BFB cmp edi, ebx
:0040B0AE 5F pop edi
:0040B0AF 7419 je 0040B0CA
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040B07E(C)
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:0040B0B1 53 push ebx
:0040B0B2 53 push ebx
* Possible StringData Ref from Data Obj ->"无法记录注册信息.
请联系 crawler@4dev.com"
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:0040B0B3 68A88F4500 push 00458FA8
:0040B0B8 E866B50200 call 00436623
:0040B0BD 8BCE mov ecx, esi
:0040B0BF E8DE400200 call 0042F1A2
:0040B0C4 5E pop esi
:0040B0C5 5B pop ebx
:0040B0C6 83C408 add esp, 00000008
:0040B0C9 C3 ret
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040B0AF(C)
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:0040B0CA 6A40 push 00000040
* Possible Reference to Dialog:
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:0040B0CC 68988F4500 push 00458F98
* Possible StringData Ref from Data Obj ->"欢迎使用 Registry Crawle 的完整版本. "
->"感谢你注册软件.
请重新启动程序,以解除所有未注"
->"册版本的功能限制."
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:0040B0D1 68FC8E4500 push 00458EFC
:0040B0D6 8BCE mov ecx, esi
:0040B0D8 E80F110200 call 0042C1EC
:0040B0DD 8BCE mov ecx, esi
:0040B0DF E8BE400200 call 0042F1A2
:0040B0E4 5E pop esi
:0040B0E5 5B pop ebx
:0040B0E6 83C408 add esp, 00000008
:0040B0E9 C3 ret
======看看0040B047处的跳转是到哪儿了：
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040B047(C)
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:0040B0EA 8BCE mov ecx, esi
:0040B0EC E80FFAFFFF call 0040AB00 <<-------注意这个CALL，F10带过的话，EAX＝0
:0040B0F1 85C0 test eax, eax
:0040B0F3 7419 je 0040B10E <<------跳
:0040B0F5 6A40 push 00000040
* Possible Reference to Dialog:
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:0040B0F7 68E88E4500 push 00458EE8
* Possible StringData Ref from Data Obj ->"你输入的注册信息仅能用于 Registry "
->"Crawler 3.x 版本.
要注册 4.0 "
->"以上版本,你需要新的注册信息.请与我们联系,将你?
->"淖⒉崧肷兜?Registry Crawler "
->"4.0 (E-mail sales@4dev.com). 注意在 "
->"E-mail 中你必须提供旧版本的注册码.
谢谢,
4Dev"
->"elopers Team."
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:0040B0FC 68AC8D4500 push 00458DAC
:0040B101 8BCE mov ecx, esi
:0040B103 E8E4100200 call 0042C1EC
:0040B108 5E pop esi
:0040B109 5B pop ebx
:0040B10A 83C408 add esp, 00000008
:0040B10D C3 ret
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040B0F3(C)
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:0040B10E 6A30 push 00000030
* Possible Reference to Dialog:
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:0040B110 68A08D4500 push 00458DA0
* Possible StringData Ref from Data Obj ->"你输入的注册信息是无效的.
请重新输入你从 "
->"4Developers LLC 得到的用户 ID "
->"及相应的注册码.
如果你尚未注册,你可以点击下面"
->"的 '马上定购' 软件.如果你需要帮助，请发 "
->"E-mail 到: crawler@4dev.com"
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:0040B115 68908C4500 push 00458C90
:0040B11A 8BCE mov ecx, esi
:0040B11C E8CB100200 call 0042C1EC
:0040B121 5E pop esi
:0040B122 5B pop ebx
:0040B123 83C408 add esp, 00000008
:0040B126 C3 ret
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由上面这段代码不难看出，Regstry Crawler 的注册码运算有两处：0040B040处的CALL，0040B0EC处的CALL，其中前者为4.0版的注册码运算，而后者为3.x版注册码的运算，3.x版的注册码运算与4.0版的有点像。注册码验证流程为：先将用户名用4.0版的注册码算法进行运算，并与用户输入的注册码进行比较，不同的话，再将用户名用3.x版的注册码算法进行运算，并与用户输入的注册码进行比较，如果相同，则提示用户更新注册码，如果不同，则跳出注册失败对话框。本文只是对4.0版的注册码运算进行分析，不讨论3.x版的算法，因此不进入第二个CALL。
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初步分析完成，进入第二次分析：
来到 0040B040处，按F8进入CALL，此时来到：
* Referenced by a CALL at Addresses:
|:0040AAF3 , :0040B040
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:0040ACF0 83EC24 sub esp, 00000024
:0040ACF3 83C9FF or ecx, FFFFFFFF
:0040ACF6 33C0 xor eax, eax
:0040ACF8 55 push ebp
:0040ACF9 57 push edi
* Possible Reference to Dialog:
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:0040ACFA BF10E54500 mov edi, 0045E510 <<------0045E510为用户名首地址 \
:0040ACFF F2 repnz \
:0040AD00 AE scasb 测试用户名长度－＞ECX
:0040AD01 F7D1 not ecx /
:0040AD03 49 dec ecx /
:0040AD04 8BE9 mov ebp, ecx
:0040AD06 83FD08 cmp ebp, 00000008
:0040AD09 7D06 jge 0040AD11 <--------大于或等于8则跳，如果不跳，则不进行4.0版的注册码算法（此例中的用户名符合条件）
:0040AD0B 5F pop edi
:0040AD0C 5D pop ebp
:0040AD0D 83C424 add esp, 00000024
:0040AD10 C3 ret
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝下面开始注册码算法＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040AD09(C)
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:0040AD11 53 push ebx
:0040AD12 56 push esi
:0040AD13 6810E54500 push 0045E510 <<-------用户名入栈
:0040AD18 E845D00100 call 00427D62 <<-------将用户名中所有的大写字母转成小写字母
:0040AD1D B907000000 mov ecx, 00000007
:0040AD22 33C0 xor eax, eax
:0040AD24 8D7C2419 lea edi, dword ptr [esp+19]
:0040AD28 C644241800 mov [esp+18], 00
:0040AD2D F3 repz
:0040AD2E AB stosd
:0040AD2F 66AB stosw
:0040AD31 83C404 add esp, 00000004
:0040AD34 AA stosb
:0040AD35 8D442414 lea eax, dword ptr [esp+14]
* Possible Reference to Dialog:
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:0040AD39 68E48B4500 push 00458BE4 <<---------“8267－”入栈
:0040AD3E 50 push eax
* Reference To: KERNEL32.lstrcpyA, Ord:0302h
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:0040AD3F FF155C834400 Call dword ptr [0044835C] <<-------“8267－”首地址－＞EAX
:0040AD45 33DB xor ebx, ebx <<-------EBX清零，准备计数
* Referenced by a (U)nconditional or (C)onditional Jump at Address:
|:0040ADFA(C)
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* Possible StringData Ref from Data Obj ->"0123456789"
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:0040AD47 8B35FC8A4500 mov esi, dword ptr [00458AFC] <<--------字符串“0123456789”的首地址－＞ESI
:0040AD4D 83C9FF or ecx, FFFFFFFF
:0040AD50 8BFE mov edi, esi \
:0040AD52 33C0 xor eax, eax \
:0040AD54 F2 repnz \
:0040AD55 AE scasb 测试“0123456789”的长度－＞ECX
:0040AD56 F7D1 not ecx /
:0040AD58 49 dec ecx /
:0040AD59 8BC3 mov eax, ebx
:0040AD5B 33D2 xor edx, edx
:0040AD5D 8BFE mov edi, esi
:0040AD5F F7F1 div ecx <<--------此处运算后，EDX存放余数
:0040AD61 8BC3 mov eax, ebx
:0040AD63 6A01 push 00000001
:0040AD65 0FBE0C32 movsx ecx, byte ptr [edx+esi] <<-------字符串“0123456789”的每个字符按顺序依次送入ECX，每次循环送入一个
:0040AD69 33D2 xor edx, edx
:0040AD6B F7F5 div ebp <<=======EBP存放用户名长度，始终不变
:0040AD6D 0FBE8210E54500 movsx eax, byte ptr [edx+0045E510] <<---------用户名的第个字符按顺序依次送入EAX，每次循环送入一个，如果用户名长度小于循环次数，则遍历完一次用户名后，重新从用户名的第一位开始
:0040AD74 8BD0 mov edx, eax
:0040AD76 C1E205 shl edx, 05
:0040AD79 03D0 add edx, eax
:0040AD7B 8D0450 lea eax, dword ptr [eax+2*edx]
:0040AD7E 03C8 add ecx, eax
:0040AD80 8BC3 mov eax, ebx
:0040AD82 0FAFC3 imul eax, ebx
:0040AD85 0FAFC3 imul eax, ebx
:0040AD8B 8D1480 lea edx, dword ptr [eax+4*eax]
:0040AD8E 8D0450 lea eax, dword ptr [eax+2*edx]
:0040AD91 03C8 add ecx, eax
:0040AD93 33C0 xor eax, eax
:0040AD95 8BD1 mov edx, ecx
:0040AD97 83C9FF or ecx, FFFFFFFF \
:0040AD9A F2 repnz \
:0040AD9B AE scasb 测试“0123456789”的长度－＞ECX
:0040AD9C F7D1 not ecx /
:0040AD9E 8BC2 mov eax, edx /
:0040ADA0 49 dec ecx /
:0040ADA1 33D2 xor edx, edx
:0040ADA3 F7F1 div ecx <<------运算的余数－＞EDX
:0040ADA5 8D442418 lea eax, dword ptr [esp+18]
:0040ADA9 03D6 add edx, esi <<-------ESI为“0123456789”的首地址
:0040ADAB 52 push edx
:0040ADAC 50 push eax
:0040ADAD E82EEB0000 call 004198E0
:0040ADB2 83C40C add esp, 0000000C
:0040ADB5 85DB test ebx, ebx
:0040ADB7 743D je 0040ADF6 <<------------仅第一次循环时（EBX＝0）跳 \
:0040ADB9 8BC3 mov eax, ebx \
:0040ADBB 33D2 xor edx, edx \
:0040ADBD B903000000 mov ecx, 00000003 此处控制注册码的形式
:0040ADC2 F7F1 div ecx /
:0040ADC4 85D2 test edx, edx /
:0040ADC6 752E jne 0040ADF6 <<---------余数不为0则跳 /
* Possible Reference to Dialog:
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:0040ADC8 BFEC8B4500 mov edi, 00458BEC
:0040ADCD 83C9FF or ecx, FFFFFFFF
:0040ADD0 33C0 xor eax, eax
:0040ADD2 8D542414 lea edx, dword ptr [esp+14]
:0040ADD6 F2 repnz
:0040ADD7 AE scasb
:0040ADD8 F7D1 not ecx
:0040ADDA 2BF9 sub edi, ecx
:0040ADDC 8BF7 mov esi, edi
:0040ADDE 8BFA mov edi, edx
:0040ADE0 8BD1 mov edx, ecx
:0040ADE2 83C9FF or ecx, FFFFFFFF
:0040ADE5 F2 repnz
:0040ADE6 AE scasb
:0040ADE7 8BCA mov ecx, edx
:0040ADE9 4F dec edi
:0040ADEA C1E902 shr ecx, 02
:0040ADED F3 repz
:0040ADEE A5 movsd
:0040ADEF 8BCA mov ecx, edx
:0040ADF1 83E103 and ecx, 00000003
:0040ADF4 F3 repz
:0040ADF5 A4 movsb
* Referenced by a (U)nconditional or (C)onditional Jump at Addresses:
|:0040ADB7(C), :0040ADC6(C)
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:0040ADF6 43 inc ebx
:0040ADF7 83FB09 cmp ebx, 00000009
:0040ADFA 0F8247FFFFFF jb 0040AD47
:0040AE00 8D442414 lea eax, dword ptr [esp+14]
:0040AE04 6810E64500 push 0045E610
:0040AE09 50 push eax
:0040AE0A E801570100 call 00420510
:0040AE0F 83C408 add esp, 00000008
:0040AE12 F7D8 neg eax
:0040AE14 5E pop esi
:0040AE15 5B pop ebx
:0040AE16 1BC0 sbb eax, eax
:0040AE18 5F pop edi
:0040AE19 40 inc eax
:0040AE1A 5D pop ebp
:0040AE1B 83C424 add esp, 00000024
:0040AE1E C3 ret
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算法思想：
将用户名与固定字符串“0123456789”进行运算，以运算结果的EDX（余数）中的值为偏移量，取得此偏移量所指向的“0123456789”中的值并输出，共循环9次。注册码形式为：8267-XXXX-XXX-XX
本例中：
用户名：alphakk/OCG
注册码：8267-7626-579-75
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＝＝＝＝＝Open Cracking Group＝＝＝＝＝＝
＝
＝
＝Registry Crawler 4.0注册码算法分析
＝ （附：注册机）
＝
＝ CrAcKeD BY alphakk/OCG
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注册机在：http://www.newclw.com/lllufh/cgi-bin/leoboard.cgi
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