Home > Threat descriptions >

Black Monday


Category: Malware

Type: Virus

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

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.

Knowledge Base

Find the latest advice in our Community Knowledge Base.

About the product

See the manual for your F-Secure product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details


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