http://msmvps.com/blogs/harrywaldron/archive/2005/10/26/72992.aspxThis new Instant Messenger (IM) threat should be closely watched as it contains a security backdoor and other sophisticated capabilities. http://secunia.com/virus_information/22890/virkel.a/ Virkel is a backdoor with IM (Instant Messenger) spreading capabilitiesenCommunityServer 2008.5 SP2 (Build: 40407.4157)