On Saturday, information security firm Sophos reported a new "backdoor Trojan" designed to allow remote operations and password "phishing" on systems running Mac OS X.
The author of the Trojan refers to his or her work as "BlackHole RAT" and claims the malware is still in beta. Indeed, Sophos, who re-named the threat "OSX/MusMinim-A," says the current code is a very basic variation of darkComet, a well-known Remote Access Trojan (RAT) for Microsoft Windows. The source code for darkComet is freely available online.
http://www.tuaw.com/2011/02/28/new-trojan-musminim-a-written-for-mac-os-x/