The name of this virus is derived from a text string found inside it:
Black Monday 2/3/90 KV KL MAL
It is rarely possible to restore infected .EXE files, as the virus may overwrite some bytes at the end of the file.
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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See the manual for your F-Secure product on the Help Center.
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A 781 byte, possibly older variant, which is only able to infect COM files.