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[转帖]申请加入DFCG NO.1-Replay Video Suite 10.2注册算法分析
2005-10-10 21:21 7600

[转帖]申请加入DFCG NO.1-Replay Video Suite 10.2注册算法分析

2005-10-10 21:21
7600
Replay Video Suite 10.2注册算法分析
【破解作者】 winndy[FCG][PYG]
【作者邮箱】 CNwinndy@hotmail.com
【使用工具】 OllyDbg v1.10 fly修改版
【破解平台】 Winxp
【软件名称】 Replay Video Suite 10.2
【官方网址】 http://www.applian.com/wmr/index.php?src=all-streaming-media.com
【编写语言】 Microsoft VC 5.00 and 6.00
【软件介绍】 There's no easier way to record Online Videos than with the Replay Video Suite, featuring WM Recorder (for

Windows Media?), RM Recorder (for Real?) and WM VCR.
用PPlive看网络电视时,突然想到有没有工具可以把电视录下来呢?google找到此软件。
【破解声明】 For Study ,For Fun
【保护方式】序列号
【破解过程】
无壳,安装目录下面有个Registration.exe,分析它没错了。
OD载入,搜索字符串参考,很容易找到突破口。
"RWMR1a-517"是输入的假注册码。

$$$1.整体着手,找准突破口
00401F71    .  A1 6C384200       mov eax,dword ptr ds:[42386C]
00401F76    .  6A 40             push 40                                            ; /Count = 40 (64.)
00401F78    .  50                push eax                                           ; |Buffer => 0012FC10
00401F79    .  68 CA000000       push 0CA                                           ; |ControlID = CA (202.)
00401F7E    .  53                push ebx                                           ; |hWnd
00401F7F    .  FF15 C0734100     call dword ptr ds:[<&USER32.GetDlgItemTextA>]      ; \GetDlgItemTextA
00401F85    .  8B0D 6C384200     mov ecx,dword ptr ds:[42386C]                      ;ECX 0012FC10 ASCII "RWMR1a-517"
00401F8B    .  51                push ecx
00401F8C    .  E8 4FFAFFFF       call Registra.004019E0                             ;校验call,返回eax,等于2则注册码合法
                                                                                    ;这个过程分析见后面
00401F91    .  83C4 04           add esp,4
00401F94    .  83F8 02           cmp eax,2                                          ;
00401F97    .  75 70             jnz short Registra.00402009                        ;  No jump
00401F99    .  8B15 6C384200     mov edx,dword ptr ds:[42386C]
00401F9F    .  83C9 FF           or ecx,FFFFFFFF
00401FA2    .  8BFA              mov edi,edx
00401FA4    .  33C0              xor eax,eax
00401FA6    .  F2:AE             repne scas byte ptr es:[edi]
00401FA8    .  F7D1              not ecx
00401FAA    .  2BF9              sub edi,ecx
00401FAC    .  52                push edx
00401FAD    .  8BC1              mov eax,ecx
00401FAF    .  8BF7              mov esi,edi
00401FB1    .  BF 782E4200       mov edi,Registra.00422E78
00401FB6    .  C1E9 02           shr ecx,2
00401FB9    .  F3:A5             rep movs dword ptr es:[edi],dword ptr ds:[esi]
00401FBB    .  8BC8              mov ecx,eax
00401FBD    .  83E1 03           and ecx,3
00401FC0    .  F3:A4             rep movs byte ptr es:[edi],byte ptr ds:[esi]
00401FC2    .  C705 D4334200 020>mov dword ptr ds:[4233D4],2
00401FCC    .  E8 4FFCFFFF       call Registra.00401C20
{
功能:将注册码保存到注册表中去。
通过检查注册表,发现注册码保存在两个地方,HKEY_CURRENT_USER以及HKEY_LOCAL_MACHINE这两个树下面都有。

00401C20   /$  A1 702E4200 mov eax,dword ptr ds:[422E70]
00401C25   |.  83F8 01     cmp eax,1
00401C28   |.  75 0C       jnz short Registra.00401C36
00401C2A   |.  8B4424 04   mov eax,dword ptr ss:[esp+4]
00401C2E   |.  68 B8E04100 push Registra.0041E0B8             ;  ASCII "Software\WMR10"
00401C33   |.  50          push eax
00401C34   |.  EB 0F       jmp short Registra.00401C45
00401C36   |>  83F8 02     cmp eax,2
00401C39   |.  75 17       jnz short Registra.00401C52
00401C3B   |.  8B4C24 04   mov ecx,dword ptr ss:[esp+4]
00401C3F   |.  68 A8E04100 push Registra.0041E0A8             ;  ASCII "Software\RMR10"
00401C44   |.  51          push ecx
00401C45   |>  68 60E14100 push Registra.0041E160             ;  ASCII "RegCode"
00401C4A   |.  E8 B1F3FFFF call Registra.00401000
00401C4F   |.  83C4 0C     add esp,0C
00401C52   |>  C705 603842>mov dword ptr ds:[423860],1
00401C5C   \.  C3          retn


}
00401FD1    .  83C4 04           add esp,4
00401FD4    .  6A 00             push 0                                             ; /Style = MB_OK|MB_APPLMODAL
00401FD6    .  68 F0324200       push Registra.004232F0                             ; |Title = ""
00401FDB    .  68 D4E14100       push Registra.0041E1D4                             ; |Text = "Registation Code Accepted"
00401FE0    .  53                push ebx                                           ; |hOwner
00401FE1    .  FF15 08744100     call dword ptr ds:[<&USER32.MessageBoxA>]          ; \MessageBoxA
00401FE7    .  6A 01             push 1                                             ; /Result = 1
00401FE9    .  53                push ebx                                           ; |hWnd
00401FEA    .  C705 68384200 010>mov dword ptr ds:[423868],1                        ; |
00401FF4    .  FF15 C4734100     call dword ptr ds:[<&USER32.EndDialog>]            ; \EndDialog
00401FFA    .  B8 01000000       mov eax,1
00401FFF    .  5F                pop edi
00402000    .  5E                pop esi
00402001    .  5D                pop ebp
00402002    .  5B                pop ebx
00402003    .  83C4 40           add esp,40
00402006    .  C2 1000           retn 10
00402009    >  6A 00             push 0                                             ; /Style = MB_OK|MB_APPLMODAL
0040200B    .  68 F0324200       push Registra.004232F0                             ; |Title = ""
00402010    .  68 B8E14100       push Registra.0041E1B8                             ; |Text = "Invalid Registration Code"
00402015    .  53                push ebx                                           ; |hOwner
00402016    .  C705 D4334200 000>mov dword ptr ds:[4233D4],0                        ; |
00402020    .  FF15 08744100     call dword ptr ds:[<&USER32.MessageBoxA>]          ; \MessageBoxA
00402026    >  57                push edi
00402027    .  8D4C24 44         lea ecx,dword ptr ss:[esp+44]
0040202B    .  56                push esi
0040202C    .  51                push ecx
0040202D    .  FFD5              call ebp
0040202F    .  85C0              test eax,eax
00402031    .  74 09             je short Registra.0040203C
00402033    .  6A 00             push 0                                             ; /Result = 0
00402035    .  53                push ebx                                           ; |hWnd
00402036    .  FF15 C4734100     call dword ptr ds:[<&USER32.EndDialog>]            ; \EndDialog
0040203C    >  33C0              xor eax,eax
0040203E    .  5F                pop edi
0040203F    .  5E                pop esi
00402040    .  5D                pop ebp
00402041    .  5B                pop ebx
00402042    .  83C4 40           add esp,40
00402045    .  C2 1000           retn 10


$$$2.深入分析注册码校验call
00401F8C    .  E8 4FFAFFFF       call Registra.004019E0  
这里,F7进入call。

004019E0   /$  81EC C4000000     sub esp,0C4                         ;  Main call
004019E6   |.  55                push ebp
004019E7   |.  8BAC24 CC000000   mov ebp,dword ptr ss:[esp+CC]
004019EE   |.  56                push esi
004019EF   |.  57                push edi
004019F0   |.  55                push ebp
004019F1   |.  E8 2A1B0000       call Registra.00403520              ;  ToUpperCase
{sub_00403520 begin
 功能:小写字母转为大写字母。

  00403520   /$  51                push ecx
  00403521   |.  A1 085A4200       mov eax,dword ptr ds:[425A08]     ;[[425A08]]=0
  00403526   |.  53                push ebx
  00403527   |.  55                push ebp
  00403528   |.  33ED              xor ebp,ebp
  0040352A   |.  56                push esi
  0040352B   |.  57                push edi
  0040352C   |.  85C0              test eax,eax
  0040352E   |.  75 2E             jnz short Registra.0040355E
  00403530   |.  8B4424 18         mov eax,dword ptr ss:[esp+18]    ;EAX 0012FC10 ASCII "RWMR1a-517"
                                                                    ;EAX是注册码字符串的指针,指向首地址
  00403534   |.  8BD0              mov edx,eax
  00403536   |.  8038 00           cmp byte ptr ds:[eax],0
  00403539   |.  0F84 56010000     je Registra.00403695
  @@@@Begin LOOP:
  0040353F   |>  8A0A              /mov cl,byte ptr ds:[edx]           ;  小写转为大写,ToUpperCase
  00403541   |.  80F9 61           |cmp cl,61                          ;  asc(a)=61
  00403544   |.  7C 0A             |jl short Registra.00403550
  00403546   |.  80F9 7A           |cmp cl,7A                          ;  asc(z)=7A
  00403549   |.  7F 05             |jg short Registra.00403550
  0040354B   |.  80E9 20           |sub cl,20                          ;61-20=41,asc(A)=41,
;同时也要注意若是其他可打印字符,减去20以后又会是什么样的结果呢?
;20(Space)是ascii值最小的可打印字符,20+20=40=asc(@)
;带着疑惑,可以故意在假码中设置一些特定字符,继续往下分析。

  0040354E   |.  880A              |mov byte ptr ds:[edx],cl           ;写回,这个call的功能一目了然
  00403550   |>  8A4A 01           |mov cl,byte ptr ds:[edx+1]         ;取下一个字母
  00403553   |.  42                |inc edx                            ;指针后移
  00403554   |.  84C9              |test cl,cl
  00403556   |.^ 75 E7             \jnz short Registra.0040353F
  @@@@END LOOP.
  00403558   |.  5F                pop edi
  00403559   |.  5E                pop esi
  0040355A   |.  5D                pop ebp
  0040355B   |.  5B                pop ebx
  0040355C   |.  59                pop ecx
  0040355D   |.  C3                retn
sub_00403520 end

}
004019F6   |.  8A4D 00           mov cl,byte ptr ss:[ebp]             ;cl=52,这是注册码第一个字母的ascii值
004019F9   |.  83C4 04           add esp,4
004019FC   |.  80F9 20           cmp cl,20                            ;是否等于空格
004019FF   |.  8BC5              mov eax,ebp
00401A01   |.  75 0F             jnz short Registra.00401A12          ;跳!
00401A03   |.  B1 20             mov cl,20
00401A05   |>  84C9              /test cl,cl
00401A07   |.  74 09             |je short Registra.00401A12
00401A09   |.  8A48 01           |mov cl,byte ptr ds:[eax+1]
00401A0C   |.  40                |inc eax
00401A0D   |.  80F9 20           |cmp cl,20
00401A10   |.^ 74 F3             \je short Registra.00401A05
00401A12   |>  8A08              mov cl,byte ptr ds:[eax]            ;eax仍是注册码的首地址
00401A14   |.  8BD0              mov edx,eax
00401A16   |.  84C9              test cl,cl
00401A18   |.  74 2E             je short Registra.00401A48
00401A1A   |>  80F9 49           /cmp cl,49                          ;  asc(I)=49
00401A1D   |.  75 03             |jnz short Registra.00401A22        ;如果遇到"I",则用"1"代替。
00401A1F   |.  C600 31           |mov byte ptr ds:[eax],31           ;asc(1)=31
00401A22   |>  8038 4F           |cmp byte ptr ds:[eax],4F           ;  asc(O)=4F
00401A25   |.  75 03             |jnz short Registra.00401A2A
00401A27   |.  C600 30           |mov byte ptr ds:[eax],30           ;遇到"O",则用"0"代替。
00401A2A   |>  8A08              |mov cl,byte ptr ds:[eax]           ;取出,与空格比较
00401A2C   |.  80F9 20           |cmp cl,20
00401A2F   |.  74 14             |je short Registra.00401A45         ;是空格就跳
00401A31   |.  80F9 0A           |cmp cl,0A                          ;asc(0A)=LF,line feed,换行
00401A34   |.  74 0F             |je short Registra.00401A45
00401A36   |.  80F9 0D           |cmp cl,0D                          ;asc(0D)=CR,换行
00401A39   |.  74 0A             |je short Registra.00401A45
00401A3B   |.  8A48 01           |mov cl,byte ptr ds:[eax+1]         ;取下一个
00401A3E   |.  40                |inc eax                            ;指针后移
00401A3F   |.  84C9              |test cl,cl
00401A41   |.^ 75 D7             \jnz short Registra.00401A1A
00401A43   |.  EB 03             jmp short Registra.00401A48         ;跳
00401A45   |>  C600 00           mov byte ptr ds:[eax],0
00401A48   |>  8BFA              mov edi,edx                         ;EDI 0012FC10 ASCII "RWMR1a-517"
00401A4A   |.  83C9 FF           or ecx,FFFFFFFF                     ;ECX置为FFFFFFFF
00401A4D   |.  33C0              xor eax,eax
00401A4F   |.  8D7424 10         lea esi,dword ptr ss:[esp+10]
00401A53   |.  F2:AE             repne scas byte ptr es:[edi]
00401A55   |.  F7D1              not ecx                             ;  这几句的意思是得到注册码长度,存入ECX
00401A57   |.  2BF9              sub edi,ecx                         ;  恢复EDI,重新指向注册码
00401A59   |.  897424 0C         mov dword ptr ss:[esp+C],esi
00401A5D   |.  8BC1              mov eax,ecx                         ;  length
00401A5F   |.  8BF7              mov esi,edi
00401A61   |.  8B7C24 0C         mov edi,dword ptr ss:[esp+C]        ;  0012F6CC
00401A65   |.  C1E9 02           shr ecx,2
00401A68   |.  F3:A5             rep movs dword ptr es:[edi],dword p>;  move code from esi to edi
00401A6A   |.  8BC8              mov ecx,eax
00401A6C   |.  33C0              xor eax,eax
00401A6E   |.  83E1 03           and ecx,3
00401A71   |.  F3:A4             rep movs byte ptr es:[edi],byte ptr>
00401A73   |.  8BFA              mov edi,edx
00401A75   |.  83C9 FF           or ecx,FFFFFFFF
00401A78   |.  F2:AE             repne scas byte ptr es:[edi]
00401A7A   |.  F7D1              not ecx                             ;  length
00401A7C   |.  2BF9              sub edi,ecx
00401A7E   |.  8BD1              mov edx,ecx
00401A80   |.  8BF7              mov esi,edi
00401A82   |.  8BFD              mov edi,ebp
00401A84   |.  C1E9 02           shr ecx,2
00401A87   |.  F3:A5             rep movs dword ptr es:[edi],dword p>
00401A89   |.  8BCA              mov ecx,edx
00401A8B   |.  83E1 03           and ecx,3
00401A8E   |.  F3:A4             rep movs byte ptr es:[edi],byte ptr>
00401A90   |.  A1 702E4200       mov eax,dword ptr ds:[422E70]       ; 

;我们加载的是Registration.exe,而实际上应该由WMR.exe来加载,
;我们发现如果eax应或为1或为2,不能为0,可以验证为0就挂了。
;猜测的情况是像WMR.exe这样的程序来调用Registration.exe,然后相应在地址422E70置1或2。
;因此,要跟踪下去,在这里要修改eax,通过观察下面的ascii串,以及我们分析的WMR,显然eax要置1.

00401A95   |.  83F8 01           cmp eax,1
00401A98   |.  75 78             jnz short Registra.00401B12
00401A9A   |.  6A 04             push 4                              ;"RWMR"的长度
00401A9C   |.  8D4424 14         lea eax,dword ptr ss:[esp+14]
00401AA0   |.  68 58E14100       push Registra.0041E158              ;  ASCII "RWMR"
00401AA5   |.  50                push eax                            ;EAX 0012F6CC ASCII "RWMR1A-517"
00401AA6   |.  E8 65190000       call Registra.00403410              ;跟进,见后面
00401AAB   |.  83C4 0C           add esp,0C
00401AAE   |.  F7D8              neg eax
00401AB0   |.  1BC0              sbb eax,eax
00401AB2   |.  40                inc eax
00401AB3   |.  75 19             jnz short Registra.00401ACE         ;跳了,若注册码前4位不是"RWMR",则继续往下检测
00401AB5   |.  6A 03             push 3
00401AB7   |.  8D4C24 14         lea ecx,dword ptr ss:[esp+14]
00401ABB   |.  68 54E14100       push Registra.0041E154              ;  ASCII "RAV"
00401AC0   |.  51                push ecx
00401AC1   |.  E8 4A190000       call Registra.00403410
00401AC6   |.  83C4 0C           add esp,0C
00401AC9   |.  F7D8              neg eax
00401ACB   |.  1BC0              sbb eax,eax
00401ACD   |.  40                inc eax
00401ACE   |>  85C0              test eax,eax   
00401AD0   |.  0F85 B9000000     jnz Registra.00401B8F                ;跳
00401AD6   |.  6A 03             push 3
00401AD8   |.  8D5424 14         lea edx,dword ptr ss:[esp+14]
00401ADC   |.  68 50E14100       push Registra.0041E150              ;  ASCII "RVS"
00401AE1   |.  52                push edx
00401AE2   |.  E8 29190000       call Registra.00403410
00401AE7   |.  83C4 0C           add esp,0C
00401AEA   |.  F7D8              neg eax
00401AEC   |.  1BC0              sbb eax,eax
00401AEE   |.  40                inc eax
00401AEF   |.  85C0              test eax,eax
00401AF1   |.  0F85 98000000     jnz Registra.00401B8F
00401AF7   |.  6A 03             push 3
00401AF9   |.  8D4424 14         lea eax,dword ptr ss:[esp+14]
00401AFD   |.  68 4CE14100       push Registra.0041E14C              ;  ASCII "RMC"
00401B02   |.  50                push eax
00401B03   |.  E8 08190000       call Registra.00403410
00401B08   |.  83C4 0C           add esp,0C
00401B0B   |.  F7D8              neg eax
00401B0D   |.  1BC0              sbb eax,eax
00401B0F   |.  40                inc eax
00401B10   |.  EB 79             jmp short Registra.00401B8B

00401B12   |>  83F8 02           cmp eax,2
00401B15   |.  75 70             jnz short Registra.00401B87
00401B17   |.  6A 04             push 4
00401B19   |.  8D4C24 14         lea ecx,dword ptr ss:[esp+14]
00401B1D   |.  68 44E14100       push Registra.0041E144              ;  ASCII "RWMX"
00401B22   |.  51                push ecx
00401B23   |.  E8 E8180000       call Registra.00403410
00401B28   |.  83C4 0C           add esp,0C
00401B2B   |.  F7D8              neg eax
00401B2D   |.  1BC0              sbb eax,eax
00401B2F   |.  40                inc eax
00401B30   |.  75 19             jnz short Registra.00401B4B
00401B32   |.  6A 03             push 3
00401B34   |.  8D5424 14         lea edx,dword ptr ss:[esp+14]
00401B38   |.  68 54E14100       push Registra.0041E154              ;  ASCII "RAV"
00401B3D   |.  52                push edx
00401B3E   |.  E8 CD180000       call Registra.00403410
00401B43   |.  83C4 0C           add esp,0C
00401B46   |.  F7D8              neg eax
00401B48   |.  1BC0              sbb eax,eax
00401B4A   |.  40                inc eax
00401B4B   |>  85C0              test eax,eax
00401B4D   |.  75 40             jnz short Registra.00401B8F
00401B4F   |.  6A 03             push 3
00401B51   |.  8D4424 14         lea eax,dword ptr ss:[esp+14]
00401B55   |.  68 50E14100       push Registra.0041E150              ;  ASCII "RVS"
00401B5A   |.  50                push eax
00401B5B   |.  E8 B0180000       call Registra.00403410
00401B60   |.  83C4 0C           add esp,0C
00401B63   |.  F7D8              neg eax
00401B65   |.  1BC0              sbb eax,eax
00401B67   |.  40                inc eax
00401B68   |.  85C0              test eax,eax
00401B6A   |.  75 23             jnz short Registra.00401B8F
00401B6C   |.  6A 03             push 3
00401B6E   |.  8D4C24 14         lea ecx,dword ptr ss:[esp+14]
00401B72   |.  68 4CE14100       push Registra.0041E14C              ;  ASCII "RMC"
00401B77   |.  51                push ecx
00401B78   |.  E8 93180000       call Registra.00403410
00401B7D   |.  83C4 0C           add esp,0C
00401B80   |.  F7D8              neg eax
00401B82   |.  1BC0              sbb eax,eax
00401B84   |.  40                inc eax
00401B85   |.  EB 04             jmp short Registra.00401B8B

00401B87   |>  8B4424 0C         mov eax,dword ptr ss:[esp+C]
00401B8B   |>  85C0              test eax,eax
00401B8D   |.  74 6D             je short Registra.00401BFC
00401B8F   |>  8D5424 10         lea edx,dword ptr ss:[esp+10]       ; EDX 0012F6CC ASCII "RWMR1A-517"
00401B93   |.  8D4424 50         lea eax,dword ptr ss:[esp+50]       ;  0012F70C
00401B97   |.  52                push edx                            ; /String2
00401B98   |.  50                push eax                            ; |String1
00401B99   |.  FF15 E4714100     call dword ptr ds:[<&KERNEL32.lstrc>; \lstrcpyA
00401B9F   |.  8D4C24 50         lea ecx,dword ptr ss:[esp+50]       ;  ECX 0012F70C ASCII "RWMR1A-517"
00401BA3   |.  6A 2D             push 2D                             ;  asc(2D)="-"
00401BA5   |.  51                push ecx
00401BA6   |.  E8 A5170000       call Registra.00403350              ;  check "-",见后面分析
00401BAB   |.  83C4 08           add esp,8
00401BAE   |.  85C0              test eax,eax                        ;  eax !=0
00401BB0   |.  74 5F             je short Registra.00401C11
00401BB2   |.  C600 00           mov byte ptr ds:[eax],0             ;  clear "-"
00401BB5   |.  8D9424 90000000   lea edx,dword ptr ss:[esp+90]       ; EDX=0012F74C
00401BBC   |.  8D4424 50         lea eax,dword ptr ss:[esp+50]       ;  EAX 0012F70C ASCII "RWMR1A"
00401BC0   |.  52                push edx
00401BC1   |.  50                push eax
00401BC2   |.  E8 E9FDFFFF       call Registra.004019B0              ;  见分析
00401BC7   |.  83C4 08           add esp,8
00401BCA   |.  8D4C24 10         lea ecx,dword ptr ss:[esp+10]       ;  ECX 0012F6CC ASCII "RWMR1A-517"
00401BCE   |.  8D9424 90000000   lea edx,dword ptr ss:[esp+90]       ;  EDX 0012F74C ASCII "RWMR1A-631",这是真正的注册码.
                                                                     ;到这里基本上可以收工了,但我还是继续往下分析。
00401BD5   |.  51                push ecx
00401BD6   |.  52                push edx
00401BD7   |.  E8 94160000       call Registra.00403270              ;见分析,the last one!
00401BDC   |.  83C4 08           add esp,8
00401BDF   |.  85C0              test eax,eax                        ;eax为0
00401BE1   |.  75 19             jnz short Registra.00401BFC         ;  No jump
00401BE3   |.  C705 D4334200 020>mov dword ptr ds:[4233D4],2
00401BED   |.  B8 02000000       mov eax,2                           ;标志
00401BF2   |.  5F                pop edi
00401BF3   |.  5E                pop esi
00401BF4   |.  5D                pop ebp
00401BF5   |.  81C4 C4000000     add esp,0C4
00401BFB   |.  C3                retn

00401BFC   |>  68 E8030000       push 3E8                            ; /Timeout = 1000. ms
00401C01   |.  FF15 E8714100     call dword ptr ds:[<&KERNEL32.Sleep>; \Sleep
00401C07   |.  C705 D4334200 000>mov dword ptr ds:[4233D4],0
00401C11   |>  5F                pop edi
00401C12   |.  5E                pop esi
00401C13   |.  33C0              xor eax,eax
00401C15   |.  5D                pop ebp
00401C16   |.  81C4 C4000000     add esp,0C4
00401C1C   \.  C3                retn

$$$3.一个比较关键的call:Registra.00403410
    功能:验证注册码的前四个字符是不是"RWMR"。
00403410   /$  55                push ebp
00403411   |.  8BEC              mov ebp,esp
00403413   |.  57                push edi
00403414   |.  56                push esi
00403415   |.  53                push ebx
00403416   |.  8B4D 10           mov ecx,dword ptr ss:[ebp+10]
00403419   |.  0BC9              or ecx,ecx
0040341B   |.  0F84 E9000000     je Registra.0040350A
00403421   |.  8B75 08           mov esi,dword ptr ss:[ebp+8]            ;  ESI 0012F6CC ASCII "RWMR1A-517"
00403424   |.  8B7D 0C           mov edi,dword ptr ss:[ebp+C]            ;  EDI 0041E158 ASCII "RWMR"
00403427   |.  8D05 005A4200     lea eax,dword ptr ds:[425A00]           ;  eax=00425A00
0040342D   |.  8378 08 00        cmp dword ptr ds:[eax+8],0              ;[eax+8]=0
00403431   |.  75 4E             jnz short Registra.00403481
00403433   |.  B7 41             mov bh,41                               ;  asc(41)=A
00403435   |.  B3 5A             mov bl,5A                               ;  asc(5A)=Z
00403437   |.  B6 20             mov dh,20                               ;asc(20)=Space
00403439   |.  2E:8BC0           mov eax,eax
0040343C   |>  8A26              /mov ah,byte ptr ds:[esi]               ;假码
0040343E   |.  0AE4              |or ah,ah
00403440   |.  8A07              |mov al,byte ptr ds:[edi]               ;常数字符串"RWMR"
00403442   |.  74 21             |je short Registra.00403465
00403444   |.  0AC0              |or al,al
00403446   |.  74 1D             |je short Registra.00403465
00403448   |.  46                |inc esi
00403449   |.  47                |inc edi
0040344A   |.  38FC              |cmp ah,bh                             ;与"A"比较
0040344C   |.  72 06             |jb short Registra.00403454
0040344E   |.  38DC              |cmp ah,bl                             ;与"Z"比较
00403450   |.  77 02             |ja short Registra.00403454
00403452   |.  02E6              |add ah,dh                             ;变为小写
00403454   |>  38F8              |cmp al,bh                             ;与"A"比较
00403456   |.  72 06             |jb short Registra.0040345E
00403458   |.  38D8              |cmp al,bl                             ;与"Z"比较
0040345A   |.  77 02             |ja short Registra.0040345E
0040345C   |.  02C6              |add al,dh                             ;变成小写
0040345E   |>  38C4              |cmp ah,al                             ;假码与常数串相比较
00403460   |.  75 0D             |jnz short Registra.0040346F
00403462   |.  49                |dec ecx                               ;计数器-1,初值4,即常数串的长度
                                                                        ;所以注册码的前面4位是常数串"RWMR"
00403463   |.^ 75 D7             \jnz short Registra.0040343C
00403465   |>  33C9              xor ecx,ecx                            ;置0,下面有置-1的语句,这是一个BOOL参数
00403467   |.  38C4              cmp ah,al
00403469   |.  0F84 9B000000     je Registra.0040350A                   ;跳
0040346F   |>  B9 FFFFFFFF       mov ecx,-1
00403474   |.  0F82 90000000     jb Registra.0040350A
0040347A   |.  F7D9              neg ecx
0040347C   |.  E9 89000000       jmp Registra.0040350A
00403481   |>  F0:FF05 E86D4200  lock inc dword ptr ds:[426DE8]
00403488   |.  833D E46D4200 00  cmp dword ptr ds:[426DE4],0
0040348F   |.  7F 04             jg short Registra.00403495
00403491   |.  6A 00             push 0
00403493   |.  EB 19             jmp short Registra.004034AE
00403495   |>  F0:FF0D E86D4200  lock dec dword ptr ds:[426DE8]
0040349C   |.  8BD9              mov ebx,ecx
0040349E   |.  6A 13             push 13
004034A0   |.  E8 2B360000       call Registra.00406AD0
004034A5   |.  C70424 01000000   mov dword ptr ss:[esp],1
004034AC   |.  8BCB              mov ecx,ebx
004034AE   |>  33C0              xor eax,eax
004034B0   |.  33DB              xor ebx,ebx
004034B2   |.  8BC0              mov eax,eax
004034B4   |>  8A06              /mov al,byte ptr ds:[esi]
004034B6   |.  0BC0              |or eax,eax
004034B8   |.  8A1F              |mov bl,byte ptr ds:[edi]
004034BA   |.  74 23             |je short Registra.004034DF
004034BC   |.  0BDB              |or ebx,ebx
004034BE   |.  74 1F             |je short Registra.004034DF
004034C0   |.  46                |inc esi
004034C1   |.  47                |inc edi
004034C2   |.  51                |push ecx
004034C3   |.  50                |push eax
004034C4   |.  53                |push ebx
004034C5   |.  E8 96370000       |call Registra.00406C60
004034CA   |.  8BD8              |mov ebx,eax
004034CC   |.  83C4 04           |add esp,4
004034CF   |.  E8 8C370000       |call Registra.00406C60
004034D4   |.  83C4 04           |add esp,4
004034D7   |.  59                |pop ecx
004034D8   |.  3BC3              |cmp eax,ebx
004034DA   |.  75 09             |jnz short Registra.004034E5
004034DC   |.  49                |dec ecx
004034DD   |.^ 75 D5             \jnz short Registra.004034B4
004034DF   |>  33C9              xor ecx,ecx
004034E1   |.  3BC3              cmp eax,ebx
004034E3   |.  74 09             je short Registra.004034EE
004034E5   |>  B9 FFFFFFFF       mov ecx,-1
004034EA   |.  72 02             jb short Registra.004034EE
004034EC   |.  F7D9              neg ecx
004034EE   |>  58                pop eax
004034EF   |.  0BC0              or eax,eax
004034F1   |.  75 09             jnz short Registra.004034FC
004034F3   |.  F0:FF0D E86D4200  lock dec dword ptr ds:[426DE8]
004034FA   |.  EB 0E             jmp short Registra.0040350A
004034FC   |>  8BD9              mov ebx,ecx
004034FE   |.  6A 13             push 13                                 ; /Arg1 = 00000013
00403500   |.  E8 4B360000       call Registra.00406B50                  ; \Registra.00406B50
00403505   |.  83C4 04           add esp,4
00403508   |.  8BCB              mov ecx,ebx
0040350A   |>  8BC1              mov eax,ecx                             ;Bool参数到eax,程序返回后根据eax决定流程
0040350C   |.  5B                pop ebx
0040350D   |.  5E                pop esi
0040350E   |.  5F                pop edi
0040350F   |.  C9                leave
00403510   \.  C3                retn


$$$4.又一个比较关键的call:Registra.00403350  
功能:
返回值:eax,应该不为0。eax指向"-".
00403340   /> /8D42 FF     lea eax,dword ptr ds:[edx-1]
00403343   |. |5B          pop ebx
00403344   |. |C3          retn
00403345   |  |2E          db 2E                                   ;  CHAR '.'
00403346   |  |8BC0        mov eax,eax
00403348   |  |2E          db 2E                                   ;  CHAR '.'
00403349   |  |8BC0        mov eax,eax
0040334B   |  |2E          db 2E                                   ;  CHAR '.'
0040334C   |  |8BC0        mov eax,eax
0040334E   |  |8BC0        mov eax,eax
00403350   |$ |33C0        xor eax,eax                              ;F7,进来后,land here
00403352   |. |8A4424 08   mov al,byte ptr ss:[esp+8]              ;2D
00403356   |> |53          push ebx
00403357   |. |8BD8        mov ebx,eax                             ;ebx=002D
00403359   |. |C1E0 08     shl eax,8                              ;eax=002D00
0040335C   |. |8B5424 08   mov edx,dword ptr ss:[esp+8]           ;EDX 0012F70C ASCII "RWMR1A-517"
00403360   |. |F7C2 030000>test edx,3
00403366   |. |74 13       je short Registra.0040337B             ;跳了
00403368   |> |8A0A        /mov cl,byte ptr ds:[edx]              ;
0040336A   |. |42          |inc edx
0040336B   |. |38D9        |cmp cl,bl                             ;
0040336D   |.^\74 D1       |je short Registra.00403340
0040336F   |.  84C9        |test cl,cl
00403371   |.  74 51       |je short Registra.004033C4
00403373   |.  F7C2 030000>|test edx,3
00403379   |.^ 75 ED       \jnz short Registra.00403368
0040337B   |>  0BD8        or ebx,eax                              ;
0040337D   |.  57          push edi
0040337E   |.  8BC3        mov eax,ebx                             ;  eax=2D2D
00403380   |.  C1E3 10     shl ebx,10                              ;  
00403383   |.  56          push esi
00403384   |.  0BD8        or ebx,eax                              ;ebx=2D2D2D2D
00403386   |>  8B0A        /mov ecx,dword ptr ds:[edx]
00403388   |.  BF FFFEFE7E |mov edi,7EFEFEFF
0040338D   |.  8BC1        |mov eax,ecx
0040338F   |.  8BF7        |mov esi,edi                            ;  7EFEFEFF
00403391   |.  33CB        |xor ecx,ebx
00403393   |.  03F0        |add esi,eax
00403395   |.  03F9        |add edi,ecx
00403397   |.  83F1 FF     |xor ecx,FFFFFFFF
0040339A   |.  83F0 FF     |xor eax,FFFFFFFF
0040339D   |.  33CF        |xor ecx,edi
0040339F   |.  33C6        |xor eax,esi
004033A1   |.  83C2 04     |add edx,4
004033A4   |.  81E1 000101>|and ecx,81010100
004033AA   |.  75 1C       |jnz short Registra.004033C8            ;  Must jump

;若注册码中有"-",就跳了
;这段代码很难理解,但是注意到asc(2D)="-",
;很容易猜想到注册码中是不是需要有"-".

004033AC   |.  25 00010181 |and eax,81010100
004033B1   |.^ 74 D3       |je short Registra.00403386
004033B3   |.  25 00010101 |and eax,1010100
004033B8   |.  75 08       |jnz short Registra.004033C2
004033BA   |.  81E6 000000>|and esi,80000000
004033C0   |.^ 75 C4       \jnz short Registra.00403386
004033C2   |>  5E          pop esi
004033C3   |.  5F          pop edi
004033C4   |>  5B          pop ebx
004033C5   |.  33C0        xor eax,eax                             ;这里将eax清零,故不能跳到004033C2.
004033C7   |.  C3          retn
004033C8   |>  8B42 FC     mov eax,dword ptr ds:[edx-4]            ;EAX=352D4131
004033CB   |.  38D8        cmp al,bl                               ;这几个比较用来确定"-"的位置
004033CD   |.  74 36       je short Registra.00403405
004033CF   |.  84C0        test al,al
004033D1   |.^ 74 EF       je short Registra.004033C2              ;  No jump
004033D3   |.  38DC        cmp ah,bl
004033D5   |.  74 27       je short Registra.004033FE
004033D7   |.  84E4        test ah,ah
004033D9   |.^ 74 E7       je short Registra.004033C2              ;  No jump
004033DB   |.  C1E8 10     shr eax,10                              ;右移16位
004033DE   |.  38D8        cmp al,bl
004033E0   |.  74 15       je short Registra.004033F7
004033E2   |.  84C0        test al,al
004033E4   |.^ 74 DC       je short Registra.004033C2              ;  No jump
004033E6   |.  38DC        cmp ah,bl
004033E8   |.  74 06       je short Registra.004033F0
004033EA   |.  84E4        test ah,ah
004033EC   |.^ 74 D4       je short Registra.004033C2              ;  No jump
004033EE   |.^ EB 96       jmp short Registra.00403386
004033F0   |>  5E          pop esi
004033F1   |.  5F          pop edi
004033F2   |.  8D42 FF     lea eax,dword ptr ds:[edx-1]
004033F5   |.  5B          pop ebx
004033F6   |.  C3          retn
004033F7   |>  8D42 FE     lea eax,dword ptr ds:[edx-2]           ;EAX 0012F712 ASCII "-517",
                                                                  ;EAX指向"-",找到"-"
004033FA   |.  5E          pop esi
004033FB   |.  5F          pop edi
004033FC   |.  5B          pop ebx
004033FD   |.  C3          retn
004033FE   |>  8D42 FD     lea eax,dword ptr ds:[edx-3]
00403401   |.  5E          pop esi
00403402   |.  5F          pop edi
00403403   |.  5B          pop ebx
00403404   |.  C3          retn
00403405   |>  8D42 FC     lea eax,dword ptr ds:[edx-4]
00403408   |.  5E          pop esi
00403409   |.  5F          pop edi
0040340A   |.  5B          pop ebx
0040340B   \.  C3          retn

$$$5.Registra.004019B0 :计算sum
功能:计算注册码"-"前面的字母的ascii码之和+0BD。
00401990   /$  8B5424 04   mov edx,dword ptr ss:[esp+4]     ;EDX 0012F70C ASCII "RWMR1A"
00401994   |.  B8 BD000000 mov eax,0BD                      ;常数
00401999   |.  8A0A        mov cl,byte ptr ds:[edx]
0040199B   |.  84C9        test cl,cl
0040199D   |.  74 0D       je short Registra.004019AC
0040199F   |>  0FBEC9      /movsx ecx,cl
004019A2   |.  03C1        |add eax,ecx                     ;累加和
004019A4   |.  8A4A 01     |mov cl,byte ptr ds:[edx+1]      ;取下一个
004019A7   |.  42          |inc edx
004019A8   |.  84C9        |test cl,cl
004019AA   |.^ 75 F3       \jnz short Registra.0040199F
004019AC   \>  C3          retn                       
004019AD       90          nop
004019AE       90          nop
004019AF       90          nop
004019B0   /$  56          push esi
004019B1   |.  8B7424 08   mov esi,dword ptr ss:[esp+8]
004019B5   |.  56          push esi
004019B6   |.  E8 D5FFFFFF call Registra.00401990                  ; return eax=sum
004019BB   |.  83C4 04     add esp,4                               ;  <%d>=hex(Decimal)
004019BE   |.  50          push eax                                ; /<%d>
004019BF   |.  8B4424 10   mov eax,dword ptr ss:[esp+10]           ; |
004019C3   |.  56          push esi                                ; |<%s>
004019C4   |.  68 3CE14100 push Registra.0041E13C                  ; |Format = "%s-%d"
004019C9   |.  50          push eax                                ; |s
004019CA   |.  FF15 D47341>call dword ptr ds:[<&USER32.wsprintfA>] ; \wsprintfA
004019D0   |.  83C4 10     add esp,10
004019D3   |.  5E          pop esi
004019D4   \.  C3          retn

$$$6.最后一个call:Registra.00403270
功能:比较注册码
00403270   /$  55          push ebp
00403271   |.  8BEC        mov ebp,esp
00403273   |.  57          push edi
00403274   |.  56          push esi
00403275   |.  53          push ebx
00403276   |.  8B75 0C     mov esi,dword ptr ss:[ebp+C]      ;ESI 0012F6CC ASCII "RWMR1A-517"
00403279   |.  8B7D 08     mov edi,dword ptr ss:[ebp+8]      ;EDI 0012F74C ASCII "RWMR1A-631"
0040327C   |.  8D05 005A42>lea eax,dword ptr ds:[425A00]     ;EAX 00425A00 Registra.00425A00
00403282   |.  8378 08 00  cmp dword ptr ds:[eax+8],0        ;[eax+8]=0。
00403286   |.  75 3B       jnz short Registra.004032C3
00403288   |.  B0 FF       mov al,0FF
0040328A   |.  8BC0        mov eax,eax
0040328C   |>  0AC0        /or al,al
0040328E   |.  74 2E       |je short Registra.004032BE        ;比较完后就跳
00403290   |.  8A06        |mov al,byte ptr ds:[esi]          ;取假码到al
00403292   |.  46          |inc esi
00403293   |.  8A27        |mov ah,byte ptr ds:[edi]          ;取真码到ah
00403295   |.  47          |inc edi
00403296   |.  38C4        |cmp ah,al                         ;比较假码和真码
00403298   |.^ 74 F2       |je short Registra.0040328C        ;相等就继续比较,我们要修改内存,使之相等。
0040329A   |.  2C 41       |sub al,41                         ;  41=asc(A)
0040329C   |.  3C 1A       |cmp al,1A                         ;1A=26,26个字母
0040329E   |.  1AC9        |sbb cl,cl
004032A0   |.  80E1 20     |and cl,20
004032A3   |.  02C1        |add al,cl
004032A5   |.  04 41       |add al,41                         ;  41-->61
004032A7   |.  86E0        |xchg al,ah
004032A9   |.  2C 41       |sub al,41
004032AB   |.  3C 1A       |cmp al,1A
004032AD   |.  1AC9        |sbb cl,cl
004032AF   |.  80E1 20     |and cl,20
004032B2   |.  02C1        |add al,cl
004032B4   |.  04 41       |add al,41                         ;  35=asc(5)
004032B6   |.  38E0        |cmp al,ah
004032B8   |.^ 74 D2       \je short Registra.0040328C
004032BA   |.  1AC0        sbb al,al
004032BC   |.  1C FF       sbb al,0FF                        ;不相等的话,我想应该是置eax为FF
004032BE   |>  0FBEC0      movsx eax,al                      ;跳到这里,eax置0
004032C1   |.  EB 78       jmp short Registra.0040333B       ;收工咯!
004032C3   |>  F0:FF05 E86>lock inc dword ptr ds:[426DE8]
004032CA   |.  833D E46D42>cmp dword ptr ds:[426DE4],0
004032D1   |.  7F 04       jg short Registra.004032D7
004032D3   |.  6A 00       push 0
004032D5   |.  EB 15       jmp short Registra.004032EC
004032D7   |>  F0:FF0D E86>lock dec dword ptr ds:[426DE8]
004032DE   |.  6A 13       push 13
004032E0   |.  E8 EB370000 call Registra.00406AD0
004032E5   |.  C70424 0100>mov dword ptr ss:[esp],1
004032EC   |>  B8 FF000000 mov eax,0FF
004032F1   |.  33DB        xor ebx,ebx
004032F3   |.  90          nop
004032F4   |>  0AC0        /or al,al
004032F6   |.  74 27       |je short Registra.0040331F
004032F8   |.  8A06        |mov al,byte ptr ds:[esi]
004032FA   |.  46          |inc esi
004032FB   |.  8A1F        |mov bl,byte ptr ds:[edi]
004032FD   |.  47          |inc edi
004032FE   |.  38D8        |cmp al,bl
00403300   |.^ 74 F2       |je short Registra.004032F4
00403302   |.  50          |push eax
00403303   |.  53          |push ebx
00403304   |.  E8 57390000 |call Registra.00406C60
00403309   |.  8BD8        |mov ebx,eax
0040330B   |.  83C4 04     |add esp,4
0040330E   |.  E8 4D390000 |call Registra.00406C60
00403313   |.  83C4 04     |add esp,4
00403316   |.  38C3        |cmp bl,al
00403318   |.^ 74 DA       \je short Registra.004032F4
0040331A   |.  1BC0        sbb eax,eax
0040331C   |.  83D8 FF     sbb eax,-1
0040331F   |>  8BD8        mov ebx,eax
00403321   |.  58          pop eax
00403322   |.  0BC0        or eax,eax
00403324   |.  75 09       jnz short Registra.0040332F
00403326   |.  F0:FF0D E86>lock dec dword ptr ds:[426DE8]
0040332D   |.  EB 0A       jmp short Registra.00403339
0040332F   |>  6A 13       push 13                            ; /Arg1 = 00000013
00403331   |.  E8 1A380000 call Registra.00406B50             ; \Registra.00406B50
00403336   |.  83C4 04     add esp,4
00403339   |>  8BC3        mov eax,ebx
0040333B   |>  5B          pop ebx
0040333C   |.  5E          pop esi
0040333D   |.  5F          pop edi
0040333E   |.  C9          leave
0040333F   \.  C3          retn

$$$7.容易看到这一个系列的都是这样注册。
但是当你注册WMVCR.exe时,就不是那么一回事了。
分析一下WMVCR.exe,发现这个程序自己有注册码验证的过程,自己也加了一些小花样,但不难分析。

过程基本相同,在找到"-"后的一段比较,稍有改变,如下:

00403B47   |.  4E          dec esi                           
;esi指向"-"的位置,但已被置为00
;esi减1后指向"-"前面的字符
00403B48   |.  8806        mov byte ptr ds:[esi],al           ;再置0
00403B4A   |.  8A4E FB     mov cl,byte ptr ds:[esi-5]         ; "-"前面的第6个字符
00403B4D   |.  83EE 05     sub esi,5                          ;
00403B50   |.  B0 47       mov al,47                          ;  asc(47)="G"
00403B52   |.  3AC8        cmp cl,al                          ;是"G"吗?
00403B54   |.  74 32       je short WMVCR.00403B88            ;  Must jump
00403B56   |.  3846 01     cmp byte ptr ds:[esi+1],al         ; "-"前面的第5个字符
00403B59   |.  74 2D       je short WMVCR.00403B88            ;  Must jump
00403B5B   |.  3846 03     cmp byte ptr ds:[esi+3],al         ; "-"前面的第3个字符
00403B5E   |.  74 28       je short WMVCR.00403B88            ;  Must jump

//如果注册码的"-"前面的第6,5,或3个字符是"G",则跳到正确的地方置eax=2。
//但前面4个字符串又必须是"RWMV",这两个条件同时满足,"-"前的长度最小为7。
//如果eax不为2,分析下面的流程,发现有一个办法可以跳到00403B88,
//要满足:edx>2或eax<=2,但eax>=6F20503B.
//通过跟踪WMVCR.0040FA30,发现这个call是计算"-"前的字母的和,
//和保存在:edx:eax,这是多大的数啊!死路!

00403B60   |.  8D4C24 10   lea ecx,dword ptr ss:[esp+10]
00403B64   |>  8A01        /mov al,byte ptr ds:[ecx]
00403B66   |.  3C 30       |cmp al,30
00403B68   |.  7C 04       |jl short WMVCR.00403B6E
00403B6A   |.  3C 39       |cmp al,39
00403B6C   |.  7E 03       |jle short WMVCR.00403B71
00403B6E   |>  41          |inc ecx
00403B6F   |.^ EB F3       \jmp short WMVCR.00403B64
00403B71   |>  51          push ecx
00403B72   |.  E8 B9BE0000 call WMVCR.0040FA30                ;  *********,edx>2
00403B77   |.  83C4 04     add esp,4
00403B7A   |.  83FA 02     cmp edx,2
00403B7D   |.  7C 19       jl short WMVCR.00403B98            ;  No Jump
00403B7F   |.  7F 07       jg short WMVCR.00403B88
00403B81   |.  3D 3B50206F cmp eax,6F20503B
00403B86   |.  76 10       jbe short WMVCR.00403B98           ;  No JUMP
00403B88   |>  5F          pop edi
00403B89   |.  5E          pop esi
00403B8A   |.  5D          pop ebp
00403B8B   |.  B8 02000000 mov eax,2
00403B90   |.  5B          pop ebx
00403B91   |.  81C4 C00000>add esp,0C0
00403B97   |.  C3          retn

【破解总结】too easy.
            注册机用win32 c编写。国庆节期破解完,这两天学习很忙,挤时间写的。另外两篇也会陆续写出来。
【Greetings】  看雪论坛,FCG论坛,DFCG论坛,PYG论坛等
               
【完稿时间等】2005.10.8,下午16:45,天气:晴
              武汉

【注册机源码】
附件:source.rar

[2023春季班]《安卓高级研修班(网课)》月薪两万班招生中~

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swordkok 活跃值 1 2005-10-10 21:45
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学习一下
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skyege 活跃值 2 2005-10-10 23:16
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感觉乱而已!!!!
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winndy 活跃值 17 2005-10-10 23:43
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最初由 skyege 发布
感觉乱而已!!!!


谢谢指教。
请问您是说形式乱(排版问题)还是分析得乱?
看过您得两篇精华,写作确实比较讲究,不过我喜欢随意一点啦..
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