Threat Description



Category: Malware
Type: Virus
Platform: W32
Aliases: Spirit


This is a small and tricky boot sector virus.It spreads like a typical boot virus: if only infects a hard drive if you boot with an infected floppy in drive A:. After that it will infect all floppies that are accessed in the machine.The code of the virus contains several little tricks, and it seems to be written by an experienced programmer.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

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

Contact Support

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

Technical Details

On floppy disks, the virus formats an extra track and stores the original boot sector there. On hard drive, the original MBR is stored on sector 8.The end of the virus contains this unencrypted text which is never displayed:


Spirit does nothing besides replicating.Spirit was reported to be in the wild in the Netherlands in March 1996 and in the USA and Finland in April 1996.

Technical Details:Peter Szor, F-Secure, 1996


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