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".
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
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.
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