"ANTI-2" Virus (5-June-1990)
Entry............... "Anti-2" Antivirus Virus
Alias............... ---
Strain.............. ---
Detected when....... October 1988
         where...... Helmond (Netherlands)
Clssification....... Bootsector Virus
Length of virus..... 512 Bytes
------------------------Preconditions----------------------------------
Operating System(s). Atari TOS
Version\Release..... All versions
Computer models..... All Atari ST
-------------------------Attributes------------------------------------
Easy identification. The string : "This Anti-Virus beeps" can be found 
                        in the bootsector at Byte Nr. $1E, or in memory 
                        at Dskbufp+$600+$1E.
Type of infection... Any non-executable Bootsector will be overwritten
Infection Trigger... Execution of BIOS disk function Getbpb.
Media affected...... Any kind of media. 
Interrupts hooked... hdv_bpb vector (used by BIOS disk functions).
Damage.............. ---
Damage trigger...... ---
Particularities..... The Program can be used as an anti-virus. If the
                        bootsector is executable, the program produces 
                        a sound and the screen flashes.
Similarities........ ---
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Countermeasures..... Make sure that the virus is not in memory. Modify
                        the last byte in bootsector to another value.
Standart means...... Clear all bytes in bootsector beginning at
                        offset 30 decimal.
-----------------------Acknowledgements--------------------------------
Location............ Virus Test Center, University of Hamburg, FRG
Classification by... Andre' Schaper
Documentation by.... Andre' Schaper
Information Source.. George R. Woodside
Date................ 5-June-1990

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