Toxbot

Toxbot (a.k.a. Codbot) is a computer worm that targeted Microsoft Windows XP, Windows 2000, and Windows Server 2003^[1] and was primarily active in 2005. On infected computers, it opened up a backdoor to allow command and control over the IRC network, thus creating a botnet that at its peak comprised about 1.5 million computers.^[2] The two unidentified makers of the botnet were arrested in October 2005 and received jail sentences of 24 and 18 months and fines from a Dutch court.^[3]