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".
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
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.
Jihuu will activate in the year 2000. Then it tries to overwrite the hard disk and displays:
"PARITY ERROR System halted".
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