写点东西,菜鸟也玩保护...

JolaSia · 发表于 2015-2-8 17:20:16

本帖最后由 JolaSia 于 2015-2-8 17:25 编辑

写点东西,菜鸟也玩保护...
写点杂言,有错误之处也很难避免,希望大家指正...
说点题外话,很多朋友来经常问,要入门,该怎么做,很惭愧的说,至于网上那些教程,自己也没看过, 不过可以谈谈自己的几年下来的一些经验,可提供大家参考.有人说现在的程序都加强壳,还做是不是还得去学脱壳?自己对壳没什么了解,不过自己调试过的游戏数量自己也记不清了,基本都是带壳调试,虽然不脱壳,起码加壳还是会的,那因为很现实的原因,必须保护自己的代码,想想现在的动不动就是VM,开句玩笑,那些壳方面的知识好是好,如果业余时间多,纯兴趣研究到可以.不过你得多久才能搞VM呢?等你到了能搞VM了,那不知道有什么M出来了,所以壳方面的东西,在做G方面不是必要的,可以在业余时间去分析研究.
也有朋友问,是不是先把汇编学的滚瓜乱熟,我觉得那东西必须学,尤其基本的必须掌握,象寄存器,函数调用规则,栈结构..等,尤其掌握好汇编和高级语言之间的关系,很简单的说,你能不能看懂代码,讲的具体点,你能不能针对分析的代码进行模拟或者调用.很多都说开发脱机等.你想想也能知道,假设你发现算法部分,如果你不能模拟,把算法部分扣出来,想做脱机我想很难,毕竟搞密码学的少数.
又有朋友问,我是不是得学ring 0方面的知识,我感觉适当了解是需要的,如果要深入,感觉不是必要的.现在的工具还是很多,即使工具搞不定,很多还是可以从ring 3 出发解决问题.

写的有点乱...废话就到这吧.

言归正转..机器里拿了2个游戏,做一些分析.分析的过程可能有一些跳跃和省去,因为都是以前分析了,拿到1个游戏,一般先确定游戏的主程序,现在很多游戏主程序都有commline,那首先取他的commline,方面我们OD直接启动他,跟踪启动过程.但是一些游戏虽然没有commline,但是依然不能正常启动,例如W美系列的游戏.第1个游戏,就拿W美降龙之剑说说.

游戏主程序client.exe,直接丢OD里,分析他的启动过程.分析的过程我就省去了,我们知道直接启动client.exe貌似不行的...经过调试发现1个关键函数..

0040ED40 .  55          push ebp
0040ED41 .  8BEC       mov ebp,esp
0040ED43 .  83E4 F8    and esp,FFFFFFF8
0040ED46 .  6A FF       push -1
0040ED48 .  68 B6349400 push client.009434B6                   ;  SE 处理程序安装
0040ED4D .  64:A1 0000000>mov eax,dword ptr fs:[0]
0040ED53 .  50          push eax
0040ED54 .  64:8925 00000>mov dword ptr fs:[0],esp
0040ED5B .  81EC 74060000 sub esp,674
0040ED61 .  53          push ebx
0040ED62 .  55          push ebp
0040ED63 .  8B2D 84529900 mov ebp,dword ptr ds:[<&KERNEL32.GetCurr>;  kernel32.GetCurrentDirectoryA
0040ED69 .  56          push esi
0040ED6A .  57          push edi
0040ED6B .  8BF1       mov esi,ecx
0040ED6D .  33C0       xor eax,eax
0040ED6F .  33DB       xor ebx,ebx
0040ED71 .  889C24 E00100>mov byte ptr ss:[esp+1E0],bl
0040ED78 .  B9 3F000000 mov ecx,3F
0040ED7D .  8DBC24 E10100>lea edi,dword ptr ss:[esp+1E1]
0040ED84 .  F3:AB       rep stos dword ptr es:[edi]
0040ED86 .  66:AB       stos word ptr es:[edi]
0040ED88 .  8D8424 E00100>lea eax,dword ptr ss:[esp+1E0]
0040ED8F .  50          push eax                               ; /Buffer
0040ED90 .  68 FF000000 push 0FF                               ; |BufSize = FF (255.)
0040ED95 .  FFD5       call ebp                               ; \GetCurrentDirectoryA
0040ED97 .  8DBC24 E00100>lea edi,dword ptr ss:[esp+1E0]
0040ED9E .  4F          dec edi
0040ED9F .  90          nop
0040EDA0 >  8A47 01    mov al,byte ptr ds:[edi+1]
0040EDA3 .  47          inc edi
0040EDA4 .  3AC3       cmp al,bl
0040EDA6 .^ 75 F8       jnz short client.0040EDA0
0040EDA8 .  66:8B0D 6C639>mov cx,word ptr ds:[99636C]
0040EDAF .  66:890F    mov word ptr ds:[edi],cx
0040EDB2 .  8DBC24 E00100>lea edi,dword ptr ss:[esp+1E0]
0040EDB9 .  4F          dec edi
0040EDBA .  8D9B 00000000 lea ebx,dword ptr ds:[ebx]
0040EDC0 >  8A47 01    mov al,byte ptr ds:[edi+1]
0040EDC3 .  47          inc edi
0040EDC4 .  3AC3       cmp al,bl
0040EDC6 .^ 75 F8       jnz short client.0040EDC0
0040EDC8 .  8B15 58639900 mov edx,dword ptr ds:[996358]
0040EDCE .  A1 5C639900 mov eax,dword ptr ds:[99635C]
0040EDD3 .  8B0D 60639900 mov ecx,dword ptr ds:[996360]
0040EDD9 .  8917       mov dword ptr ds:[edi],edx
0040EDDB .  8B15 64639900 mov edx,dword ptr ds:[996364]
0040EDE1 .  8947 04    mov dword ptr ds:[edi+4],eax
0040EDE4 .  A0 68639900 mov al,byte ptr ds:[996368]
0040EDE9 .  894F 08    mov dword ptr ds:[edi+8],ecx
0040EDEC .  8957 0C    mov dword ptr ds:[edi+C],edx
0040EDEF .  8D4C24 1B    lea ecx,dword ptr ss:[esp+1B]
0040EDF3 .  8847 10    mov byte ptr ds:[edi+10],al
0040EDF6 .  E8 75F44500 call client.0086E270
0040EDFB .  6A 01       push 1
0040EDFD .  68 4C639900 push client.0099634C                   ;  ASCII "client.exe"
0040EE02 .  8D4C24 23    lea ecx,dword ptr ss:[esp+23]
0040EE06 .  899C24 940600>mov dword ptr ss:[esp+694],ebx
0040EE0D .  E8 5EB9FFFF call client.0040A770
0040EE12 .  6A 01       push 1
0040EE14 .  68 3C639900 push client.0099633C                   ;  ASCII "client_r.exe"
0040EE19 .  8D4C24 23    lea ecx,dword ptr ss:[esp+23]
0040EE1D .  8BF8       mov edi,eax
0040EE1F .  E8 4CB9FFFF call client.0040A770
0040EE24 .  33C9       xor ecx,ecx
0040EE26 .  03F8       add edi,eax
0040EE28 .  83FF 01    cmp edi,1
0040EE2B .  0F9EC1       setle cl
0040EE2E .  898E 88000000 mov dword ptr ds:[esi+88],ecx
0040EE34 .  8B15 1856A600 mov edx,dword ptr ds:[A65618]
0040EE3A .  52          push edx
0040EE3B .  E8 60960500 call client.004684A0
0040EE40 .  A1 785AA600 mov eax,dword ptr ds:[A65A78]
0040EE45 .  83C4 04    add esp,4
0040EE48 .  83F8 10    cmp eax,10
0040EE4B .  A1 645AA600 mov eax,dword ptr ds:[A65A64]
0040EE50 .  73 05       jnb short client.0040EE57
0040EE52 .  B8 645AA600 mov eax,client.00A65A64
0040EE57 >  50          push eax
0040EE58 .  8D8424 640100>lea eax,dword ptr ss:[esp+164]
0040EE5F .  68 78669900 push client.00996678                   ;  ASCII "%s"
0040EE64 .  50          push eax
0040EE65 .  E8 B4BE4F00 call client.0090AD1E
0040EE6A .  8B0D 64669900 mov ecx,dword ptr ds:[996664]
0040EE70 .  8B15 68669900 mov edx,dword ptr ds:[996668]
0040EE76 .  A1 6C669900 mov eax,dword ptr ds:[99666C]
0040EE7B .  83C4 0C    add esp,0C
0040EE7E .  894C24 30    mov dword ptr ss:[esp+30],ecx
0040EE82 .  8B0D 70669900 mov ecx,dword ptr ds:[996670]
0040EE88 .  895424 34    mov dword ptr ss:[esp+34],edx
0040EE8C .  66:8B15 74669>mov dx,word ptr ds:[996674]
0040EE93 .  6A 02       push 2                                  ; /Priority = THREAD_PRIORITY_HIGHEST
0040EE95 .  894424 3C    mov dword ptr ss:[esp+3C],eax          ; |
0040EE99 .  894C24 40    mov dword ptr ss:[esp+40],ecx          ; |
0040EE9D .  66:895424 44  mov word ptr ss:[esp+44],dx             ; |
0040EEA2 .  FF15 AC509900 call dword ptr ds:[<&KERNEL32.GetCurrent>; |[GetCurrentThread
0040EEA8 .  50          push eax                               ; |hThread
0040EEA9 .  FF15 A8509900 call dword ptr ds:[<&KERNEL32.SetThreadP>; \SetThreadPriority
0040EEAF .  6A 60       push 60
0040EEB1 .  E8 9A544300 call client.00844350
0040EEB6 .  83C4 04    add esp,4
0040EEB9 .  894424 14    mov dword ptr ss:[esp+14],eax
0040EEBD .  3BC3       cmp eax,ebx
0040EEBF .  C68424 8C0600>mov byte ptr ss:[esp+68C],1
0040EEC7 .  74 0B       je short client.0040EED4
0040EEC9 .  8BC8       mov ecx,eax
0040EECB .  E8 20D42F00 call client.0070C2F0
0040EED0 .  8BF8       mov edi,eax
0040EED2 .  EB 02       jmp short client.0040EED6
0040EED4 >  33FF       xor edi,edi
0040EED6 >  3BFB       cmp edi,ebx
0040EED8 .  889C24 8C0600>mov byte ptr ss:[esp+68C],bl
0040EEDF .  74 07       je short client.0040EEE8
0040EEE1 .  8B07       mov eax,dword ptr ds:[edi]
0040EEE3 .  8BXF       mov ecx,edi
0040EEE5 .  FF50 04    call dword ptr ds:[eax+4]
0040EEE8 >  8B8E A8000000 mov ecx,dword ptr ds:[esi+A8]
0040EEEE .  3BCB       cmp ecx,ebx
0040EEF0 .  74 05       je short client.0040EEF7
0040EEF2 .  8B11       mov edx,dword ptr ds:[ecx]
0040EEF4 .  FF52 08    call dword ptr ds:[edx+8]
0040EEF7 >  89BE A8000000 mov dword ptr ds:[esi+A8],edi
0040EEFD .  E8 8E3E0000 call client.00412D90
0040EF02 .  68 48669900 push client.00996648                   ; /Title = "<<W美-降龙之剑>>自动更新"
0040EF07 .  53          push ebx                               ; |Class
0040EF08 .  FF15 D4539900 call dword ptr ds:[<&USER32.FindWindowA>>; \FindWindowA
0040EF0E .  894424 14    mov dword ptr ss:[esp+14],eax
0040EF12 .  33C0       xor eax,eax
0040EF14 .  885C24 60    mov byte ptr ss:[esp+60],bl
0040EF18 .  B9 3F000000 mov ecx,3F
0040EF1D .  8D7C24 61    lea edi,dword ptr ss:[esp+61]
0040EF21 .  F3:AB       rep stos dword ptr es:[edi]
0040EF23 .  66:AB       stos word ptr es:[edi]
0040EF25 .  8D4424 60    lea eax,dword ptr ss:[esp+60]
0040EF29 .  50          push eax
0040EF2A .  68 FF000000 push 0FF
0040EF2F .  FFD5       call ebp
0040EF31 .  8D7C24 60    lea edi,dword ptr ss:[esp+60]
0040EF35 .  4F          dec edi
0040EF36 >  8A47 01    mov al,byte ptr ds:[edi+1]
0040EF39 .  47          inc edi
0040EF3A .  3AC3       cmp al,bl
0040EF3C .^ 75 F8       jnz short client.0040EF36
0040EF3E .  8B0D 44669900 mov ecx,dword ptr ds:[996644]          ;  client.0050505C
0040EF44 .  8D4424 60    lea eax,dword ptr ss:[esp+60]
0040EF48 .  890F       mov dword ptr ds:[edi],ecx
0040EF4A .  C74424 5C 0F0>mov dword ptr ss:[esp+5C],0F
0040EF52 .  895C24 58    mov dword ptr ss:[esp+58],ebx
0040EF56 .  885C24 48    mov byte ptr ss:[esp+48],bl
0040EF5A .  8D50 01    lea edx,dword ptr ds:[eax+1]
0040EF5D .  8D49 00    lea ecx,dword ptr ds:[ecx]
0040EF60 >  8A08       mov cl,byte ptr ds:[eax]
0040EF62 .  40          inc eax
0040EF63 .  3ACB       cmp cl,bl
0040EF65 .^ 75 F9       jnz short client.0040EF60
0040EF67 .  2BC2       sub eax,edx
0040EF69 .  50          push eax
0040EF6A .  8D5424 64    lea edx,dword ptr ss:[esp+64]
0040EF6E .  52          push edx
0040EF6F .  8D4C24 4C    lea ecx,dword ptr ss:[esp+4C]
0040EF73 .  E8 382XFFFF call client.00401BB0
0040EF78 .  8D4424 44    lea eax,dword ptr ss:[esp+44]
0040EF7C .  50          push eax
0040EF7D .  C68424 900600>mov byte ptr ss:[esp+690],2
0040EF85 .  E8 A6134300 call client.00840330
0040EF8A .  8B4C24 60    mov ecx,dword ptr ss:[esp+60]
0040EF8E .  83C4 04    add esp,4
0040EF91 .  F7D8       neg eax
0040EF93 .  1AC0       sbb al,al
0040EF95 .  FEC0       inc al
0040EF97 .  83F9 10    cmp ecx,10
0040EF9A .  884424 1F    mov byte ptr ss:[esp+1F],al
0040EF9E .  889C24 8C0600>mov byte ptr ss:[esp+68C],bl
0040EFA5    72 11       jb short client.0040EFB8
0040EFA7 .  8B4C24 48    mov ecx,dword ptr ss:[esp+48]
0040EFAB .  51          push ecx
0040EFAC .  E8 30B64F00 call client.0090A5E1
0040EFB1 .  8A4424 23    mov al,byte ptr ss:[esp+23]
0040EFB5 .  83C4 04    add esp,4
0040EFB8 >  3AC3       cmp al,bl
0040EFBA .  74 0D       je short client.0040EFC9
0040EFBC .  8D5424 60    lea edx,dword ptr ss:[esp+60]
0040EFC0 .  52          push edx
0040EFC1 .  E8 AEFD4F00 call client.0090ED74
0040EFC6 .  83C4 04    add esp,4
0040EFC9    8D7C24 60    lea edi,dword ptr ss:[esp+60]
0040EFCD    4F          dec edi
0040EFCE .  8BFF       mov edi,edi
0040EFD0 >  8A47 01    mov al,byte ptr ds:[edi+1]
0040EFD3 .  47          inc edi
0040EFD4 .  3AC3       cmp al,bl
0040EFD6 .^ 75 F8       jnz short client.0040EFD0
0040EFD8 .  66:A1 6C63990>mov ax,word ptr ds:[99636C]
0040EFDE .  66:8907    mov word ptr ds:[edi],ax
0040EFE1 .  68 D4AF84XF push XF84AFD4
0040EFE6 .  E8 7981FFFF call client.00407164
0040EFEB $  FF3424       push dword ptr ss:[esp]
0040EFEE .  894C24 28    mov dword ptr ss:[esp+28],ecx
0040EFF2 .  66:0FB6E8    movzx bp,al
0040EFF6 .  66:0FCE    bswap si
0040EFF9 .  5E          pop esi
0040EFFA .  9C          pushfd
0040EFFB .  8F4424 20    pop dword ptr ss:[esp+20]
0040EFFF .  D3ED       shr ebp,cl
0040F001 .  66:0FBDE9    bsr bp,cx
0040F005 .  66:0FCD    bswap bp
0040F008 .  66:0FB3C5    btr bp,ax
0040F00C .  894424 1C    mov dword ptr ss:[esp+1C],eax
0040F010 .  66:D3E6    shl si,cl
0040F013 .  0FACDE 0F    shrd esi,ebx,0F
0040F017 .  66:09F5    or bp,si
0040F01A .  895424 18    mov dword ptr ss:[esp+18],edx
0040F01E .  E9 A9C30000 jmp client.0041B3CC
0040F023 .  FECA       dec dl
0040F025 .  30C8       xor al,cl
0040F027 .  8B55 00    mov edx,dword ptr ss:[ebp]
0040F02A .  C0F0 06    sal al,6
0040F02D .  F5          cmc
0040F02E .  F5          cmc
0040F02F .  24 57       and al,57
0040F031 .  83C5 02    add ebp,2
0040F034 .  E8 CD83FFFF call client.00407406
0040F039 $  E9 BD900000 jmp client.004180FB
0040F03E >  F6D2       not dl
0040F040 .  F5          cmc
0040F041 .  66:894C24 08  mov word ptr ss:[esp+8],cx
0040F046 .  83ED 02    sub ebp,2
0040F049 .  E8 46910000 call client.00418194
0040F04E >  9C          pushfd
0040F04F .  D2E0       shl al,cl
0040F051 .  53          push ebx
0040F052    66:8945 04 mov word ptr ss:[ebp+4],ax
0040F056    883424       mov byte ptr ss:[esp],dh
0040F059    E9 AEB80000 jmp client.0041A90C
0040F05E    894C24 24    mov dword ptr ss:[esp+24],ecx
0040F062    66:87F5    xchg bp,si
0040F065    55          push ebp
0040F066    E9 E7B20000 jmp client.0041A352
0040F06B    86E0       xchg al,ah
0040F06D    880424       mov byte ptr ss:[esp],al
0040F070    F6C6 E0    test dh,0E0
0040F073    53          push ebx
0040F074    66:29C3    sub bx,ax
0040F077    F5          cmc
0040F078    68 74D6F477 push 77F4D674                         ;  ASCII "QuoteRDNValue"
0040F07D    80FD 4C    cmp ch,4C
0040F080 ^ E9 55B0FFFF jmp client.0040A0DA
0040F085    E8 93AE0000 call client.00419F1D
0040F08A    12E8       adc ch,al
0040F08C    40          inc eax
0040F08D    36:43       inc ebx
0040F08F    008B 08682C66 add byte ptr ds:[ebx+662C6808],cl
0040F095    99          cdq
0040F096    0050 FF    add byte ptr ds:[eax-1],dl
0040F099    51          push ecx
0040F09A    108B 2DA05099 adc byte ptr ds:[ebx+9950A02D],cl
0040F0A0    0083 C4086800 add byte ptr ds:[ebx+6808C4],al
0040F0A6    4E          dec esi
0040F0A7    A6          cmps byte ptr ds:[esi],byte ptr es:[edi]
0040F0A8    0053 6A    add byte ptr ds:[ebx+6A],dl
0040F0AB    02FF       add bh,bh
0040F0AD    D5 8B       aad 8B
0040F0AF    F8          clc
0040F0B0    3BFB       cmp edi,ebx
0040F0B2    74 0E       je short client.0040F0C2
0040F0B4 .  57          push edi                               ; /hEvent
0040F0B5 .  FF15 9C509900 call dword ptr ds:[<&KERNEL32.SetEvent>] ; \SetEvent
0040F0BB .  57          push edi                               ; /hObject
0040F0BC .  FF15 34529900 call dword ptr ds:[<&KERNEL32.CloseHandl>; \CloseHandle
0040F0C2 >  68 1C669900 push client.0099661C                   ;  ASCII "PPStartEvent"
0040F0C7 .  53          push ebx
0040F0C8 .  6A 02       push 2
0040F0CA .  FFD5       call ebp
0040F0CC .  8BF8       mov edi,eax
0040F0CE .  3BFB       cmp edi,ebx
0040F0D0 .  74 0E       je short client.0040F0E0
0040F0D2 .  57          push edi                               ; /hEvent
0040F0D3 .  FF15 9C509900 call dword ptr ds:[<&KERNEL32.SetEvent>] ; \SetEvent
0040F0D9 .  57          push edi                               ; /hObject
0040F0DA .  FF15 34529900 call dword ptr ds:[<&KERNEL32.CloseHandl>; \CloseHandle
0040F0E0 >  6A 04       push 4
0040F0E2 .  889E 90000000 mov byte ptr ds:[esi+90],bl
0040F0E8 .  E8 AE984E00 call client.008F899B
0040F0ED .  83C4 04    add esp,4
0040F0F0 .  894424 14    mov dword ptr ss:[esp+14],eax
0040F0F4 .  3BC3       cmp eax,ebx
0040F0F6 .  C68424 8C0600>mov byte ptr ss:[esp+68C],3
0040F0FE .  74 09       je short client.0040F109
0040F100 .  8BC8       mov ecx,eax
0040F102 .  E8 59690000 call client.00415A60
0040F107 .  EB 02       jmp short client.0040F10B
0040F109 >  33C0       xor eax,eax
0040F10B >  889C24 8C0600>mov byte ptr ss:[esp+68C],bl
0040F112 .  8946 08    mov dword ptr ds:[esi+8],eax
0040F115 .  E8 36F00400 call client.0045E150
0040F11A .  50          push eax
0040F11B .  E8 D0EF0400 call client.0045E0F0
0040F120 .  8B4E 08    mov ecx,dword ptr ds:[esi+8]
0040F123 .  50          push eax
0040F124 .  8D9424 680100>lea edx,dword ptr ss:[esp+168]
0040F12B .  52          push edx
0040F12C .  8D4424 3C    lea eax,dword ptr ss:[esp+3C]
0040F130 .  50          push eax
0040F131 .  E8 3A8A0000 call client.00417B70
0040F136 .  85C0       test eax,eax
0040F138 .  75 0E       jnz short client.0040F148
0040F13A .  6A 30       push 30
0040F13C .  53          push ebx
0040F13D .  68 08669900 push client.00996608
0040F142 .  53          push ebx
0040F143 .  E9 CE000000 jmp client.0040F216
0040F148 >  E8 83354300 call client.008426D0
0040F14D .  8B08       mov ecx,dword ptr ds:[eax]
0040F14F .  68 F0659900 push client.009965F0                   ;  ASCII "Create Window Sucess"
0040F154 .  50          push eax
0040F155 .  FF51 10    call dword ptr ds:[ecx+10]
0040F158 .  6A 04       push 4
0040F15A .  E8 3C984E00 call client.008F899B
0040F15F .  8BF8       mov edi,eax
0040F161 .  83C4 0C    add esp,0C
0040F164 .  3BFB       cmp edi,ebx
0040F166 .  74 11       je short client.0040F179
0040F168 .  8D5424 30    lea edx,dword ptr ss:[esp+30]
0040F16C .  52          push edx                               ; /MutexName
0040F16D .  53          push ebx                               ; |InitialOwner
0040F16E .  53          push ebx                               ; |pSecurity
0040F16F .  FF15 64519900 call dword ptr ds:[<&KERNEL32.CreateMute>; \CreateMutexA
0040F175 .  8907       mov dword ptr ds:[edi],eax
0040F177 .  EB 02       jmp short client.0040F17B
0040F179 >  33FF       xor edi,edi
0040F17B >  8B46 08    mov eax,dword ptr ds:[esi+8]
0040F17E .  89BE 9C010000 mov dword ptr ds:[esi+19C],edi
0040F184 .  8B08       mov ecx,dword ptr ds:[eax]
0040F186 .  6A 05       push 5                                  ; /ShowState = SW_SHOW
0040F188 .  51          push ecx                               ; |hWnd
0040F189 .  FF15 CC539900 call dword ptr ds:[<&USER32.ShowWindow>] ; \ShowWindow
0040F18F .  8B56 08    mov edx,dword ptr ds:[esi+8]
0040F192 .  8B02       mov eax,dword ptr ds:[edx]
0040F194 .  50          push eax                               ; /hWnd
0040F195 .  FF15 C8539900 call dword ptr ds:[<&USER32.UpdateWindow>; \UpdateWindow
0040F19B .  8D8E 40010000 lea ecx,dword ptr ds:[esi+140]
0040F1A1 .  51          push ecx                               ; /pRect
0040F1A2 .  FF15 C4539900 call dword ptr ds:[<&USER32.GetClipCurso>; \GetClipCursor
0040F1A8 .  8D9424 E00300>lea edx,dword ptr ss:[esp+3E0]
0040F1AF .  52          push edx                               ; /Buffer
0040F1B0 .  68 FF000000 push 0FF                               ; |BufSize = FF (255.)
0040F1B5 .  FF15 84529900 call dword ptr ds:[<&KERNEL32.GetCurrent>; \GetCurrentDirectoryA
0040F1BB .  8D8424 E00300>lea eax,dword ptr ss:[esp+3E0]
0040F1C2 .  50          push eax
0040F1C3 .  8D8C24 840500>lea ecx,dword ptr ss:[esp+584]
0040F1CA .  68 E0659900 push client.009965E0                   ;  ASCII "%s\system.ini"
0040F1XF .  51          push ecx
0040F1D0 .  E8 49BB4F00 call client.0090AD1E
0040F1D5 .  A1 60FFA600 mov eax,dword ptr ds:[A6FF60]
0040F1DA .  83C4 0C    add esp,0C
0040F1DD .  3BC3       cmp eax,ebx
0040F1DF .  0F85 30010000 jnz client.0040F315
0040F1E5 .  E8 D62E4300 call client.008420C0
0040F1EA .  8B56 08    mov edx,dword ptr ds:[esi+8]
0040F1ED .  8B02       mov eax,dword ptr ds:[edx]
0040F1EF .  6A 01       push 1
0040F1F1 .  53          push ebx
0040F1F2 .  50          push eax
0040F1F3 .  E8 582F4300 call client.00842150
0040F1F8 .  83C4 0C    add esp,0C
0040F1FB .  3BC3       cmp eax,ebx
0040F1FD .  A3 60FFA600 mov dword ptr ds:[A6FF60],eax
0040F202 .  75 44       jnz short client.0040F248
0040F204 .  8B4E 08    mov ecx,dword ptr ds:[esi+8]
0040F207 .  8B11       mov edx,dword ptr ds:[ecx]
0040F209 .  6A 10       push 10                               ; /Style = MB_OK|MB_ICONHAND|MB_APPLMODAL
0040F20B .  68 D0659900 push client.009965D0                   ; |Title = "DirectX3D异常"
0040F210 .  68 70659900 push client.00996570                   ; |Text = "未发现DirectX3D设备,请确认未禁用3D加速功能且测试Direct 3D通过, 或更新最新的显卡驱动后再尝试游戏"
0040F215 .  52          push edx                               ; |hOwner
0040F216 >  FF15 8C539900 call dword ptr ds:[<&USER32.MessageBoxA>>; \MessageBoxA
0040F21C .  8D4C24 1B    lea ecx,dword ptr ss:[esp+1B]
0040F220 .  C78424 8C0600>mov dword ptr ss:[esp+68C],-1
0040F22B .  E8 D01DFFFF call client.00401000
0040F230 .  33C0       xor eax,eax
0040F232 .  8B8C24 840600>mov ecx,dword ptr ss:[esp+684]
0040F239 .  64:890D 00000>mov dword ptr fs:[0],ecx
0040F240 .  5F          pop edi
0040F241 .  5E          pop esi
0040F242 .  5D          pop ebp
0040F243 .  5B          pop ebx
0040F244 .  8BE5       mov esp,ebp
0040F246 .  5D          pop ebp
0040F247 .  C3          retn

经过分析, 发现1个关键判断,主要判断是不是登陆器启动

0040EFA5    /72 11       jb short client.0040EFB8

下面的信息可以看到和启动保护有关,那我们能不能跳过呢?

由于VM的关系, 那OD 分析出来的代码可能有点问题..

看看正常的代码。。。

0040F08B    E8 40364300 call client.008426D0
0040F090    8B08       mov ecx,dword ptr ds:[eax]
0040F092    68 2C669900 push client.0099662C                   ;  ASCII "PP Sucess"
0040F097    50          push eax
0040F098    FF51 10    call dword ptr ds:[ecx+10]
0040F09B    8B2D A0509900 mov ebp,dword ptr ds:[<&KERNEL32.OpenEve>;  kernel32.OpenEventA
0040F0A1    83C4 08    add esp,8
0040F0A4    68 004EA600 push client.00A64E00                   ;  ASCII "PP_XLZJ_EventA"
0040F0A9    53          push ebx
0040F0AA    6A 02       push 2
0040F0AC    FFD5       call ebp
0040F0AE    8BF8       mov edi,eax
0040F0B0    3BFB       cmp edi,ebx
0040F0B2    74 0E       je short client.0040F0C2
0040F0B4 .  57          push edi                               ; /hEvent
0040F0B5 .  FF15 9C509900 call dword ptr ds:[<&KERNEL32.SetEvent>] ; \SetEvent
0040F0BB .  57          push edi                               ; /hObject
0040F0BC .  FF15 34529900 call dword ptr ds:[<&KERNEL32.CloseHandl>; \CloseHandle
0040F0C2 >  68 1C669900 push client.0099661C                   ;  ASCII "PPStartEvent"
0040F0C7 .  53          push ebx
0040F0C8 .  6A 02       push 2
0040F0CA .  FFD5       call ebp
0040F0CC .  8BF8       mov edi,eax
0040F0CE .  3BFB       cmp edi,ebx
0040F0D0 .  74 0E       je short client.0040F0E0
0040F0D2 .  57          push edi                               ; /hEvent
0040F0D3 .  FF15 9C509900 call dword ptr ds:[<&KERNEL32.SetEvent>] ; \SetEvent
0040F0D9 .  57          push edi                               ; /hObject
0040F0DA .  FF15 34529900 call dword ptr ds:[<&KERNEL32.CloseHandl>; \CloseHandle
0040F0E0 >  6A 04       push 4
0040F0E2 .  889E 90000000 mov byte ptr ds:[esi+90],bl
0040F0E8 .  E8 AE984E00 call client.008F899B
0040F0ED .  83C4 04    add esp,4
0040F0F0 .  894424 14    mov dword ptr ss:[esp+14],eax
0040F0F4 .  3BC3       cmp eax,ebx
0040F0F6 .  C68424 8C0600>mov byte ptr ss:[esp+68C],3
0040F0FE .  74 09       je short client.0040F109

那我们找1个位置给他JMP过来....

这样游戏可以正常跑起来了.

游戏跑起来后,发现大概2分钟左右,游戏即退出,那说明客户端还有校验....

那要稳定一些调试,那肯定需要解决这个问题...

经过分析..

游戏出错是由于异常导致的...其中必须经过1个函数

0090A6A9  /> /55          push ebp
0090A6AA  |. |8BEC       mov ebp,esp
0090A6AC  |. |83EC 04    sub esp,4
0090A6AF  |. |53          push ebx
0090A6B0  |. |56          push esi
0090A6B1  |. |57          push edi
0090A6B2  |. |FC          cld
0090A6B3  |. |8945 FC    mov [local.1],eax
0090A6B6  |. |33C0       xor eax,eax
0090A6B8  |. |50          push eax
0090A6B9  |. |50          push eax
0090A6BA  |. |50          push eax
0090A6BB  |. |FF75 FC    push [local.1]
0090A6BE  |. |FF75 14    push [arg.4]
0090A6C1  |. |FF75 10    push [arg.3]
0090A6C4  |. |FF75 0C    push [arg.2]
0090A6C7  |. |FF75 08    push [arg.1]
0090A6CA  |. |E8 04720000 call client.009118D3
0090A6XF  |. |83C4 20    add esp,20
0090A6D2  |. |8945 FC    mov [local.1],eax
0090A6D5  |. |5F          pop edi
0090A6D6  |. |5E          pop esi
0090A6D7  |. |5B          pop ebx
0090A6D8  |. |8B45 FC    mov eax,[local.1]
0090A6DB  |. |8BE5       mov esp,ebp
0090A6DD  |. |5D          pop ebp
0090A6DE  \. |C3          retn

发现调用的地方..

0094354C $  B8 A403A000 mov eax,client.00A003A4                ;  结构异常处理程序
00943551 .^ E9 5371FXFF jmp client.0090A6A9
00943556    CC          int3

下断...

我们在堆栈里翻翻...

.....

0012F834  |7C92E48A  返回到 ntdll.KiUserApcDispatcher+3A 来自 ntdll.7C94A970
0012F838  |00000000
0012F83C  |0012F864
0012F840  |0012F848
0012F844  |0012F864
0012F848  |C0000005
0012F84C  |00000000
0012F850  |00000000
0012F854  |00AC94CD  client.00AC94CD

C0000005 这样的异常我就不解释了,

client.00AC94CD 是什么我们进去看看...

00AC94CD    CD 22       int 22

原来00AC94CD 是int22,执行到这后触发异常,程序无法处理.所以退出了.那把 00AC94CD  nop掉2个字节即可...

这下客户端他老实了...正常调试.
现在NP,HS,XTrap的保护越来越多,国内还有TP,GPK 之流,越来越多, 面对这些保护,如果你无法从ring 0上对抗,那是不是真的一点办法都没有呢?

我简单介绍下我处理国外某XTrap保护下的游戏.

首先用OD 启动他的主程序...

发现关键CALL
005F4EF0  /$  81EC 44070000       sub esp,744
005F4EF6  |.  53                   push ebx
005F4EF7  |.  56                   push esi
005F4EF8  |.  57                   push edi
005F4EF9  |.  33DB                xor ebx,ebx
005F4EFB  |.  B9 4A000000          mov ecx,4A
005F4F00  |.  33C0                xor eax,eax
005F4F02  |.  8DBC24 29020000       lea edi,dword ptr ss:[esp+229]
005F4F09  |.  889C24 28020000       mov byte ptr ss:[esp+228],bl
005F4F10  |.  F3:AB                rep stos dword ptr es:[edi]
005F4F12  |.  66:AB                stos word ptr es:[edi]
005F4F14  |.  AA                   stos byte ptr es:[edi]
005F4F15  |.  B9 40000000          mov ecx,40
005F4F1A  |.  33C0                xor eax,eax
005F4F1C  |.  8DBC24 59040000       lea edi,dword ptr ss:[esp+459]
005F4F23  |.  889C24 58040000       mov byte ptr ss:[esp+458],bl
005F4F2A  |.  F3:AB                rep stos dword ptr es:[edi]
005F4F2C  |.  66:AB                stos word ptr es:[edi]
005F4F2E  |.  AA                   stos byte ptr es:[edi]
005F4F2F  |.  B9 40000000          mov ecx,40
005F4F34  |.  33C0                xor eax,eax
005F4F36  |.  8DBC24 25010000       lea edi,dword ptr ss:[esp+125]
005F4F3D  |.  889C24 24010000       mov byte ptr ss:[esp+124],bl
005F4F44  |.  F3:AB                rep stos dword ptr es:[edi]
005F4F46  |.  66:AB                stos word ptr es:[edi]
005F4F48  |.  AA                   stos byte ptr es:[edi]
005F4F49  |.  B9 40000000          mov ecx,40
005F4F4E  |.  33C0                xor eax,eax
005F4F50  |.  8DBC24 55030000       lea edi,dword ptr ss:[esp+355]
005F4F57  |.  889C24 54030000       mov byte ptr ss:[esp+354],bl
005F4F5E  |.  F3:AB                rep stos dword ptr es:[edi]
005F4F60  |.  66:AB                stos word ptr es:[edi]
005F4F62  |.  AA                   stos byte ptr es:[edi]
005F4F63  |.  E8 78060000          call Fiesta.005F55E0
005F4F68  |.  8BB424 54070000       mov esi,dword ptr ss:[esp+754]
005F4F6F  |.  56                   push esi
005F4F70  |.  68 209F8300          push Fiesta.00839F20                   ;  ASCII "%s"
005F4F75  |.  68 F2C89000          push Fiesta.0090C8F2
005F4F7A  |.  E8 C8F31700          call Fiesta.00774347
005F4F7F  |.  83C4 0C             add esp,0C
005F4F82  |.  81C6 80000000       add esi,80
005F4F88  |.  56                   push esi
005F4F89  |.  68 209F8300          push Fiesta.00839F20                   ;  ASCII "%s"
005F4F8E  |.  68 E0C69000          push Fiesta.0090C6E0
005F4F93  |.  E8 AFF31700          call Fiesta.00774347
005F4F98  |.  83C4 0C             add esp,0C
005F4F9B  |.  C705 D8C59000 410000D5 mov dword ptr ds:[90C5D8],D5000041
005F4FA5  |.  C705 D4C59000 000000E5 mov dword ptr ds:[90C5D4],E5000000
005F4FAF  |.  68 A89D8300          push Fiesta.00839DA8                   ;  ASCII "211.115.86.66"
005F4FB4  |.  68 209F8300          push Fiesta.00839F20                   ;  ASCII "%s"
005F4FB9  |.  68 ECC79000          push Fiesta.0090C7EC
005F4FBE  |.  E8 84F31700          call Fiesta.00774347
005F4FC3  |.  8BB424 64070000       mov esi,dword ptr ss:[esp+764]
005F4FCA  |.  83C4 0C             add esp,0C
005F4FCD  |.  66:C705 F0C89000 7809  mov word ptr ds:[90C8F0],978
005F4FD6  |.  56                   push esi                               ; /String
005F4FD7  |.  FF15 90F17B00       call dword ptr ds:[<&KERNEL32.lstrlenA>] ; \lstrlenA
005F4FDD  |.  85C0                test eax,eax
005F4FDF  |.  75 74                jnz short Fiesta.005F5055
005F4FE1  |.  8D8424 54030000       lea eax,dword ptr ss:[esp+354]
005F4FE8  |.  68 04010000          push 104                               ; /BufSize = 104 (260.)
005F4FED  |.  50                   push eax                               ; |PathBuffer
005F4FEE  |.  53                   push ebx                               ; |hModule
005F4FEF  |.  FF15 CXF17B00       call dword ptr ds:[<&KERNEL32.GetModuleF>; \GetModuleFileNameA
005F4FF5  |.  85C0                test eax,eax
005F4FF7  |.  75 2D                jnz short Fiesta.005F5026
005F4FF9  |.  FF15 9XF07B00       call dword ptr ds:[<&KERNEL32.GetLastErr>; [GetLastError
005F4FFF  |.  6A 01                push 1
005F5001  |.  50                   push eax
005F5002  |.  6A 11                push 11
005F5004  |.  68 50CC9000          push Fiesta.0090CC50
005F5009  |.  E8 E2400000          call Fiesta.005F90F0
005F500E  |.  83C4 10             add esp,10
005F5011  |.  891D 44C49000       mov dword ptr ds:[90C444],ebx
005F5017  |.  E8 C42A0000          call Fiesta.005F7AE0
005F501C  |.  5F                   pop edi
005F501D  |.  5E                   pop esi
005F501E  |.  5B                   pop ebx
005F501F  |.  81C4 44070000       add esp,744
005F5025  |.  C3                   retn
005F5026  |>  8D8C24 58040000       lea ecx,dword ptr ss:[esp+458]
005F502D  |.  8D9424 54030000       lea edx,dword ptr ss:[esp+354]
005F5034  |.  51                   push ecx
005F5035  |.  52                   push edx
005F5036  |.  E8 85360000          call Fiesta.005F86C0
005F503B  |.  83C4 08             add esp,8
005F503E  |.  8D8424 58040000       lea eax,dword ptr ss:[esp+458]
005F5045  |.  8D8C24 24010000       lea ecx,dword ptr ss:[esp+124]
005F504C  |.  50                   push eax
005F504D  |.  68 149F8300          push Fiesta.00839F14                   ;  ASCII "%s\XTrap"
005F5052  |.  51                   push ecx
005F5053  |.  EB 0E                jmp short Fiesta.005F5063
005F5055  |>  56                   push esi
005F5056  |.  8D9424 28010000       lea edx,dword ptr ss:[esp+128]
005F505D  |.  68 149F8300          push Fiesta.00839F14                   ;  ASCII "%s\XTrap"
005F5062  |.  52                   push edx
005F5063  |>  E8 DFF21700          call Fiesta.00774347
005F5068  |.  83C4 0C             add esp,0C
005F506B  |.  8D8424 28020000       lea eax,dword ptr ss:[esp+228]
005F5072  |.  8D8C24 24010000       lea ecx,dword ptr ss:[esp+124]
005F5079  |.  50                   push eax
005F507A  |.  68 B0C59000          push Fiesta.0090C5B0
005F507F  |.  51                   push ecx
005F5080  |.  E8 AB230000          call Fiesta.005F7430
005F5085  |.  8B8424 58020000       mov eax,dword ptr ss:[esp+258]
005F508C  |.  83C4 0C             add esp,0C
005F508F  |.  83F8 02             cmp eax,2
005F5092  |.  0F84 B6010000       je Fiesta.005F524E
005F5098  |.  3D 01500A00          cmp eax,0A5001
005F509D  |.  0F84 AB010000       je Fiesta.005F524E
005F50A3  |.  B9 40000000          mov ecx,40
005F50A8  |.  33C0                xor eax,eax
005F50AA  |.  8D7C24 21             lea edi,dword ptr ss:[esp+21]
005F50AE  |.  885C24 20             mov byte ptr ss:[esp+20],bl
005F50B2  |.  F3:AB                rep stos dword ptr es:[edi]
005F50B4  |.  66:AB                stos word ptr es:[edi]
005F50B6  |.  33D2                xor edx,edx
005F50B8  |.  68 089F8300          push Fiesta.00839F08                   ;  ASCII "XTrapVa.dll"
005F50BD  |.  895424 14             mov dword ptr ss:[esp+14],edx
005F50C1  |.  8D4C24 24             lea ecx,dword ptr ss:[esp+24]
005F50C5  |.  AA                   stos byte ptr es:[edi]
005F50C6  |.  8D8424 28010000       lea eax,dword ptr ss:[esp+128]
005F50CD  |.  895424 18             mov dword ptr ss:[esp+18],edx
005F50D1  |.  50                   push eax
005F50D2  |.  895424 20             mov dword ptr ss:[esp+20],edx
005F50D6  |.  68 009F8300          push Fiesta.00839F00                   ;  ASCII "%s\%s"
005F50DB  |.  51                   push ecx
005F50DC  |.  895C24 1C             mov dword ptr ss:[esp+1C],ebx
005F50E0  |.  895424 2C             mov dword ptr ss:[esp+2C],edx
005F50E4  |.  E8 5EF21700          call Fiesta.00774347
005F50E9  |.  8D5424 1C             lea edx,dword ptr ss:[esp+1C]
005F50ED  |.  8D4424 30             lea eax,dword ptr ss:[esp+30]
005F50F1  |.  52                   push edx
005F50F2  |.  50                   push eax
005F50F3  |.  E8 F8350000          call Fiesta.005F86F0
005F50F8  |.  83C4 18             add esp,18
005F50FB  |.  8D8C24 24010000       lea ecx,dword ptr ss:[esp+124]
005F5102  |.  8D5424 20             lea edx,dword ptr ss:[esp+20]
005F5106  |.  68 F89E8300          push Fiesta.00839EF8                   ;  ASCII "*.xtp"
005F510B  |.  51                   push ecx
005F510C  |.  68 009F8300          push Fiesta.00839F00                   ;  ASCII "%s\%s"
005F5111  |.  52                   push edx
005F5112  |.  E8 30F21700          call Fiesta.00774347
005F5117  |.  8D4424 20             lea eax,dword ptr ss:[esp+20]
005F511B  |.  8D4C24 30             lea ecx,dword ptr ss:[esp+30]
005F511F  |.  50                   push eax
005F5120  |.  51                   push ecx
005F5121  |.  E8 CA350000          call Fiesta.005F86F0
005F5126  |.  83C4 18             add esp,18
005F5129  |.  8D9424 24010000       lea edx,dword ptr ss:[esp+124]
005F5130  |.  8D4424 20             lea eax,dword ptr ss:[esp+20]
005F5134  |.  68 EC9E8300          push Fiesta.00839EEC                   ;  ASCII "XTrap.XT"
005F5139  |.  52                   push edx
005F513A  |.  68 009F8300          push Fiesta.00839F00                   ;  ASCII "%s\%s"
005F513F  |.  50                   push eax
005F5140  |.  E8 02F21700          call Fiesta.00774347
005F5145  |.  8D4C24 24             lea ecx,dword ptr ss:[esp+24]
005F5149  |.  8D5424 30             lea edx,dword ptr ss:[esp+30]
005F514D  |.  51                   push ecx
005F514E  |.  52                   push edx
005F514F  |.  E8 9C350000          call Fiesta.005F86F0
005F5154  |.  83C4 18             add esp,18
005F5157  |.  8D8424 24010000       lea eax,dword ptr ss:[esp+124]
005F515E  |.  8D4C24 20             lea ecx,dword ptr ss:[esp+20]
005F5162  |.  68 E49E8300          push Fiesta.00839EE4                   ;  ASCII "*.dll"
005F5167  |.  50                   push eax
005F5168  |.  68 009F8300          push Fiesta.00839F00                   ;  ASCII "%s\%s"
005F516D  |.  51                   push ecx
005F516E  |.  E8 D4F11700          call Fiesta.00774347
005F5173  |.  8D5424 28             lea edx,dword ptr ss:[esp+28]
005F5177  |.  8D4424 30             lea eax,dword ptr ss:[esp+30]
005F517B  |.  52                   push edx
005F517C  |.  50                   push eax
005F517D  |.  E8 6E350000          call Fiesta.005F86F0
005F5182  |.  83C4 18             add esp,18
005F5185  |.  8D8C24 24010000       lea ecx,dword ptr ss:[esp+124]
005F518C  |.  8D5424 20             lea edx,dword ptr ss:[esp+20]
005F5190  |.  68 E09E8300          push Fiesta.00839EE0                   ;  ASCII "*.*"
005F5195  |.  51                   push ecx
005F5196  |.  68 009F8300          push Fiesta.00839F00                   ;  ASCII "%s\%s"
005F519B  |.  52                   push edx
005F519C  |.  E8 A6F11700          call Fiesta.00774347
005F51A1  |.  8D4424 2C             lea eax,dword ptr ss:[esp+2C]
005F51A5  |.  8D4C24 30             lea ecx,dword ptr ss:[esp+30]
005F51A9  |.  50                   push eax
005F51AA  |.  51                   push ecx
005F51AB  |.  E8 40350000          call Fiesta.005F86F0
005F51B0  |.  8B8424 64020000       mov eax,dword ptr ss:[esp+264]
005F51B7  |.  83C4 18             add esp,18
005F51BA  |.  3D 0B500A00          cmp eax,0A500B
005F51BF  |.  75 45                jnz short Fiesta.005F5206
005F51C1  |.  8B4424 1C             mov eax,dword ptr ss:[esp+1C]
005F51C5  |.  8B4C24 18             mov ecx,dword ptr ss:[esp+18]
005F51C9  |.  8D9424 24010000       lea edx,dword ptr ss:[esp+124]
005F51D0  |.  52                   push edx
005F51D1  |.  8B5424 18             mov edx,dword ptr ss:[esp+18]
005F51D5  |.  50                   push eax
005F51D6  |.  8B4424 18             mov eax,dword ptr ss:[esp+18]
005F51DA  |.  51                   push ecx
005F51DB  |.  8B4C24 18             mov ecx,dword ptr ss:[esp+18]
005F51DF  |.  52                   push edx
005F51E0  |.  8B15 ECCD9000       mov edx,dword ptr ds:[90CDEC]
005F51E6  |.  50                   push eax
005F51E7  |.  A1 F0CD9000          mov eax,dword ptr ds:[90CDF0]
005F51EC  |.  51                   push ecx
005F51ED  |.  52                   push edx
005F51EE  |.  50                   push eax
005F51EF  |.  8D8C24 7C050000       lea ecx,dword ptr ss:[esp+57C]
005F51F6  |.  68 C49E8300          push Fiesta.00839EC4                   ;  ASCII "%08X.(%d).%d.%d.%d.%d.%d.%s"
005F51FB  |.  51                   push ecx
005F51FC  |.  E8 46F11700          call Fiesta.00774347
005F5201  |.  83C4 28             add esp,28
005F5204  |.  EB 1E                jmp short Fiesta.005F5224
005F5206  |>  8D9424 54020000       lea edx,dword ptr ss:[esp+254]
005F520D  |.  52                   push edx
005F520E  |.  50                   push eax
005F520F  |.  8D8424 64050000       lea eax,dword ptr ss:[esp+564]
005F5216  |.  68 BC9E8300          push Fiesta.00839EBC                   ;  ASCII "%08X.%s"
005F521B  |.  50                   push eax
005F521C  |.  E8 26F11700          call Fiesta.00774347
005F5221  |.  83C4 10             add esp,10
005F5224  |>  8B0D ECCD9000       mov ecx,dword ptr ds:[90CDEC]
005F522A  |.  6A 03                push 3
005F522C  |.  51                   push ecx
005F522D  |.  8D9424 64050000       lea edx,dword ptr ss:[esp+564]
005F5234  |.  6A 11                push 11
005F5236  |.  52                   push edx
005F5237  |.  E8 B43E0000          call Fiesta.005F90F0
005F523C  |.  83C4 10             add esp,10
005F523F  |.  E8 9C280000          call Fiesta.005F7AE0
005F5244  |.  5F                   pop edi
005F5245  |.  5E                   pop esi
005F5246  |.  5B                   pop ebx
005F5247  |.  81C4 44070000       add esp,744
005F524D  |.  C3                   retn
005F524E  |>  B9 18000000          mov ecx,18
005F5253  |.  8DB424 54020000       lea esi,dword ptr ss:[esp+254]
005F525A  |.  BF F0CB9000          mov edi,Fiesta.0090CBF0
005F525F  |.  83E8 02             sub eax,2
005F5262  |.  F3:A5                rep movs dword ptr es:[edi],dword ptr ds>
005F5264  |.  74 0D                je short Fiesta.005F5273
005F5266  |.  2D FF4F0A00          sub eax,0A4FFF
005F526B  |.  891D 44C49000       mov dword ptr ds:[90C444],ebx
005F5271  |.  75 0A                jnz short Fiesta.005F527D
005F5273  |>  C705 44C49000 01000000 mov dword ptr ds:[90C444],1
005F527D  |>  8D8424 28020000       lea eax,dword ptr ss:[esp+228]
005F5284  |.  50                   push eax
005F5285  |.  E8 362D0000          call Fiesta.005F7FC0
005F528A  |.  8B8424 50020000       mov eax,dword ptr ss:[esp+250]
005F5291  |.  83C4 04             add esp,4
005F5294  |.  83F8 02             cmp eax,2
005F5297  |.  74 41                je short Fiesta.005F52DA
005F5299  |.  8B0D ECCD9000       mov ecx,dword ptr ds:[90CDEC]
005F529F  |.  8B15 F0CD9000       mov edx,dword ptr ds:[90CDF0]
005F52A5  |.  51                   push ecx
005F52A6  |.  52                   push edx
005F52A7  |.  50                   push eax
005F52A8  |.  8D8424 68050000       lea eax,dword ptr ss:[esp+568]
005F52AF  |.  68 AC9E8300          push Fiesta.00839EAC                   ;  ASCII "%08X.%08x.(%d)"
005F52B4  |.  50                   push eax
005F52B5  |.  E8 8DF01700          call Fiesta.00774347
005F52BA  |.  8B0D F0CD9000       mov ecx,dword ptr ds:[90CDF0]
005F52C0  |.  6A 12                push 12
005F52C2  |.  51                   push ecx
005F52C3  |.  8D9424 78050000       lea edx,dword ptr ss:[esp+578]
005F52CA  |.  6A 11                push 11
005F52CC  |.  52                   push edx
005F52CD  |.  E8 1E3E0000          call Fiesta.005F90F0
005F52D2  |.  83C4 24             add esp,24
005F52D5  |.  E8 06280000          call Fiesta.005F7AE0
005F52DA  |>  5F                   pop edi
005F52DB  |.  5E                   pop esi
005F52DC  |.  C705 E8CD9000 00010000 mov dword ptr ds:[90CDE8],100
005F52E6  |.  5B                   pop ebx
005F52E7  |.  81C4 44070000       add esp,744
005F52ED  \.  C3                   retn

其中发现关键CALL

005F5080  |.  E8 AB230000          call Fiesta.005F7430

这个Call执行后启动保护.

OD 跟进后发现为无参函数,所以直接retn,不给保护启动.

发现下面call出来还有1个返回值校验.

005F5098  |.  3D 01500A00          cmp eax,0A5001

那找个位置,写进去

005F5085  |.  8B8424 58020000       mov eax,dword ptr ss:[esp+258]

改成

005F5085    B8 01500A00          mov eax,0A5001
005F508A    90                   nop
005F508B    90                   nop

这边总结下,各类型保护启动的过程都有返回值校验,象np,hs,gpk等.

到此发现OD可以正常启动游戏... 发现角色游戏后,1分钟左右,客户端关闭,那说明保护有通信,那我们真的是不是无能为力呢?

不急,等等慢慢道来.

因为客户端关闭,还是比较容易处理的,经过几处修改,发现客户端已经很听话了,不关闭,但是角色一段时间后掉线.那说明XTrap和服务端还是存在通信的...
那必须找出通讯关键处,经过调试发现..

005F77F0  /$  A1 C0CD9000 mov eax,dword ptr ds:[90CDC0]          ;  XTrapVa.dll_Base判断....
005F77F5  |.  85C0       test eax,eax
005F77F7  |.  75 05       jnz short Fiesta.005F77FE             ;  强制跳
005F77F9  |.  E8 E2020000 call Fiesta.005F7AE0                   ;  做坏事
005F77FE  |>  8B4424 14    mov eax,dword ptr ss:[esp+14]
005F7802  |.  8B4C24 10    mov ecx,dword ptr ss:[esp+10]
005F7806  |.  8B5424 0C    mov edx,dword ptr ss:[esp+C]
005F780A  |.  50          push eax
005F780B  |.  8B4424 0C    mov eax,dword ptr ss:[esp+C]
005F780F  |.  51          push ecx
005F7810  |.  8B4C24 0C    mov ecx,dword ptr ss:[esp+C]
005F7814  |.  52          push edx
005F7815  |.  50          push eax
005F7816  |.  51          push ecx
005F7817  |.  FF15 FCCD9000 call dword ptr ds:[90CDFC]             ;  XTrapVa.dll_Base+A4A0 通信函数调用
005F781D  |.  83C4 14    add esp,14
005F7820  \.  C3          retn

所以代码上处理就简单了.

说一下我的处理方式,我是直接复制出XTrapVa.dll,改名为a.dll,这是为了避免XTrap的更新,去重复更新这部分,因为一般情况下这类保护算法上是不会有大变动的.
   if XX = 0 then
   begin
      XX:= LoadLibrary('a.dll');
      //PDWORD($0090CDC0)^:= XX; //BASE 不能写进去,写进去后触发更多判断...
      PDWORD($0090CDFC)^:= XX+$A4A0; //通信CALL写进去...
   end;

至于  //PDWORD($0090CDC0)^:= XX; //为什么不写进去,具体的游戏还是得分析.我是直接强制跳

联系我时，请说是在挂海论坛上看到的，谢谢！

zhuzhuli · 发表于 2015-2-8 19:23:08

感恩无私的分享与奉献 :)

abceeee · 发表于 2015-2-8 20:01:34

.......................真是难得给力的帖子啊。

a3799218151 · 发表于 2015-2-26 11:57:24

不错支持下

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