Threat description


Category: Malware
Type: Virus
Platform: W32
Aliases: Blue_Nine


This is a fast infector, which infects COM files when they are executed or accessed. Blue_Nine is a stealth virus, making the size of the infected files seem to be the original. Blue_Nine has lots of antiheuristics features, but it also contains several bugs.


Automatic action

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


More information on 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

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

There are several variants of Blue_Nine. The original variant (Blue_Nine.925.A) contains this text:

Blue Nine Virus by Conzouler 1994  


This variant contains this text:

It's only a lil lightfearing creature  

This variant does nothing but spreads.

Technical Details:Peter Szor, F-Secure, 1996


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