A badly written virus, which contains the text
The Midnight Serial Killer is roaming in your computer...Beware! [JD]
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
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One slightly longer variant is known, where the following text message can be found:
The Eternal Blaze Virus has been unleashed...Beware! [JD]
As the viruses destroy the programs they infect it is extremely difficult for them to spread unnoticed.