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.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
A 781 byte, possibly older variant, which is only able to infect COM files.