Parity_Boot

Threat description

Details

Category: Malware
Type: Virus
Platform: W32

Summary

Parity_Boot.B infects the boot records of diskettes and the Master Boot Records of hard disks. As a typical boot sector virus, Parity_Boot.B can infect hard disks only during a diskette boot. The virus reserves one kilobyte of conventional memory for itself and infects all non-write- protected diskettes used in an infected computer.



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.



Technical Details

Parity_Boot.B uses stealth techniques, so the changes the virus has made cannot be detected while it is active in memory. Parity_Boot.B activates at random times and prints the message "PARITY CHECK" on the screen. After this, the virus crashes the computer, simulating a genuine error situation due to faulty memory circuits.

Incidents involving the Parity_Boot.B virus have lately popped up in several parts of the world. The virus seems to be especially common in Germany, probably because the virus infected a cover-disk distributed by one of the biggest German computer magazines in late 1994.





Description Details: Mikko Hypponen, F-Secure


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