Threat Description



Category: Malware
Type: Trojan-Downloader, Worm
Platform: W32
Aliases: Agent.BKY


Agent.BKY is a worm and a trojan-downloader. It infects .HTML, .PHP and some other files with a small script that points to a website, hosting a file with the recently discovered (March/April 2007) ANI exploit.

The worm also spreads to remote and removable drives, modifies the HOSTS file and downloads more malicious files onto an infected computer. This malware is similar to the worm that we detect as Worm:W32/Anito.A.


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

Our investigation revealed that this worm and trojan-downloader is similar to the one that we detect as Worm:W32/Anito.A and Worm.Win32.Diska.C.

More information on Anito.A worms can be found here:


Detection Type: PC
Database: 2007-03-31_01


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