Threat Description

Black Monday


Category: Malware
Type: Virus
Platform: W32
Aliases: Black Monday


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

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, 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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