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 action

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

More

Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

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







Description Details: Mikko Hypponen, F-Secure


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