It seems that the first BotNet derived entirely from Mac OS X has been identified. Indeed, computers infected by both variants of iService Trojan identified couple of months ago with illegal version of Adobe CS4 and iwork '09 (in details OSX.Trojan.iServices.A et OSX.Trojan.iServices.B) have been involved in DDoS attacks. Further details can be found in the following article: http://arstechnica.com/apple/news/2009/04/evidence-suggests-first-zombie-mac-botnet-is-active.ars
