Threat Description



Category: Malware
Platform: W32
Aliases: Backdoor.Win32.IRCBot.kj, IM.Myspace04.AIM


This instant messaging worm spreads in AOL Instant Messaging (AIM) network. It was found in December 2005.


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

It sends copies of itself to people in the buddy list as a link, pointing to a file called clarissa17.pif.

After that it replies to all messages from other users with a message saying either "lol that's cool" or "lol no its not its a virus".


Detection for this malware was published on December 5th, 2005 in the following F-Secure Anti-Virus updates:

Detection Type: PC
Database: 2005-12-05_03

Description Details: Mikko Hypponen, December 12th, 2005;


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