Here is a status update on the malware using the Plug-and-Play vulnerability (MS05-039).
For the last four days we got 11 different samples of malware using this vulnerability. Currently there are three Zotob variants (.A, .B and .C), one Rbot (.YK), one Sdbot (.ADB), one CodBot, three IRCbots (.ES, .ET and .EX) and two variants of Bozori (.A, .B).
Variants from both IRCBot and Bozori families are deleting competing PnP bots.
It seems there are two groups that are fighting: IRCBot and Bozori vs Zotobs and the other Bots.