As Syzop over at UnRealCD put it...This is very embarassing. It appears that the popular UnRealCD IRCServer has been compromised with a Trojan since November 2009. If you are the keeper of one of the many UnRealCD instances I suggest you upgrade ASAP, and it probably wouldn't be a bad idea to take a long hard look at your server for other indications of compromise.
More information over at the UnRealCD forums.
Thanks to reader Colin for the heads-up!
-- Rick Wanner - rwanner at isc dot sans dot org - http://rwanner.blogspot.com/
(c) SANS Internet Storm Center. http://isc.sans.org Creative Commons Attribution-Noncommercial 3.0 United States License.