Black Monday

Threat description




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.


Automatic action

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 scanning & removal options

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.

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details


A 781 byte, possibly older variant, which is only able to infect COM files.

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