Threat Description

Jihuu.621

Details

Aliases: Jihuu.621, 621
Category: Malware
Type: Virus
Platform: W32

Summary


This virus activates on Friday the 13th displaying the message:

"Something wonderful has happened, your PC is alive".  

When it is on the 4th day of any month it shows the message:

"Water detected in match-co-processor".  


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.



Technical Details


Jihuu will activate in the year 2000. Then it tries to overwrite the hard disk and displays:

"PARITY ERROR System halted".  

Variant:Jihuu.686

Size:686

This variant was found almost three years after the variant 621 - in May 1994. The operation of the virus is identical, but the text messages have been encrypted with XOR FFh operation.





Description Details: Mikko Hypponen, F-Secure


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