Threat Description

Purcyst

Details

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

Summary



This is a boot virus. One unusual feature of this virus is that it infects both MBR and DBR on hard drives.

This virus also modified the CMOS settings of the machine in order to spoof a clean boot. Check that your drive A: settings are correct in CMOS Setup before booting clean and disinfecting the virus.

The code of the virus contains this text:

PUR'CYST

Otherwise the virus only spreads.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.








Description Created: Mikko Hypponen, F-Secure


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