Websense® Security Labs has received several reports of a new worm, "Nugache",...spreading on AOL/MSN Instant Messenger...The worm opens a back door on TCP port 8, and installs a bot...the bot appears to connect to infected peers instead of a static list. A peer-to-peer command & control channel makes it more difficult to block commands issued to the bot. The traffic over this channel also uses obfuscation in an attempt to bypass intrusion detection systems.