Security analysts at Sophos report that a new "backdoor Trojan" has been written by hackers that specifically takes aim at Apple's Mac OS X operating system. According to Chester Wisniewski of Naked Security - the popular IT security blog - the trojan in question makes remote operations and password "phishing" relatively simple.
As even the malware itself admits, it is not yet finished, but it could be indicative of more underground programmers taking note of Apple's increasing market share.
Sophos says that the potentially nefarious functions served by MusMinim include placing text files on one's desktop, delivering operation commands like restart or shutdown, running arbitrary shell commands, displaying fraudulent "Administrator Password" windows for phishing purposes, displaying a full screen window that forces reboot for closure, and more.
While this instance certainly doesn't mark the first known trojan written for Macs, it also won't mark the last - especially since Apple continues to capture a larger and perpetually-increasing chunk of the PC market. For more info, check out what the folks at Sophos have to say about OSX/MusMinim-A.