A.I.S.F. Virus - Amiga Virus Encyclopedia

VIRUS HELP TEAM


        ------------------------
        Amiga Virus Encyclopedia
        A.I.S.F. Virus
        ------------------------
    

        A.I.S.F. Virus:
        ---------------

        Length: 8708 Bytes

        This virus  will be  probably  spreaded as  a  faked  VirusChecker
        update.The file works  with all  kind of Kickstarts  and   memory-
        configurations and has no problems with faster processors.

        This file opens a window ith the following name:

        'VIRUS-CHECKER V6.72'
        'by A.I.S.F. !!!'

        The window has no funtion.It`s only a trick to irritate the users.

        The $6c Vector in the  Zeropage will be patched. Following routine
        will be installed in the vector:

        1.Decrease a counter by 1
        2.Compare if it $50000
        3.If not,do nothing
        4.If $50000 is reached,then display the following alert,which will
          be decrypted first:

        `!! CRIME DO NOT PAY !!!`
        `WHY ARE YOU SWAPPING ILLEGAL SOFT ?`
        `BECAUSE YOU ARE A CRIMINAL !!!!`
        `AND BE SURE:`
        `WE (A.I.S.F.) WILL GET YOU !`
        `(A)NTI`
        `(I)ILLEGAL`
        `(S)WAPPING`
        `(F)OUNDATION`
        `-PRESS MOUSE TO CONTINUE-`

        If  you then press a mousebutton,then the destroyroutine  will  be
        started.Your drivemotorhead steps around on the disk.

        I am only wondering,why the value $50000 was chosen.If  you  count
        only the VBI interrupt then the  virus would start its work  after
        nearly 2 hours.

        At the end of the file (which is not crunched),you can see a non-
        crypted text,which says several times:

        ' THE A.I.S.F. INTERLAMER-VIRUS  '

        VirusWorkshop removes the useless and the patched $6c vector.

        Thanks must go to Ingo Schmidt for sending me this virus.


        Test by Markus Schmall             Detection tested on 11.09.1993.


        Screenshot of AISF file virus:
        

        

Virum Help Team
Denmark & Canada
Copyright © All rights reserved
www.vht.dk