Last week, SecureMac, the company that offers anti-spyware solution for Macs, issued a warning on a threat in Apple’s Remote Desktop Agent.

The latest SecureMac Security Advisory treats the infamous Trojan that has been running around free for the past few days as a critical security risk.

The Apple Remote Desktop Agent vulnerability has been spotted on the Internet, but wasn’t considered to be a real threat at first, and it has initially been dismissed for lack of remote execution capabilities.

However, that isn’t the case anymore. According to the advisory, the both Mac OS X 10.4 and 10.5 are exposed to the Trojan, which is said to be distributed from a hacker website.

Things don’t stop here however, as hackers are planning on distributing the Trojan via iChat and Limewire.

What this Trojan does is basically mess with your Mac by exploiting a vulnerability in the Apple Remote Desktop Agent.

Users can infect their computers by downloading and running the program, which will then be able to run as root and get complete remote access to the system.

The Trojan is able to do anything from transmitting passwords to taking screenshots and using Apple’s iSight camera.

SecureMac has already issued protection against the threat in its MacScan 2.5.2, Spyware Definition Update version 2008011.

The OS X Trojan messes up a little with Apple’s image, who has been praising its security system that beats Windows by a milestone in terms of malicious threats.

Despite the “viruses don’t get to us” image that has been surrounding the Mac OS X for years now, this isn’t the first Mac vulnerability reported.

This goes to show that the Mac OS X is not immune to malware. The few reports on such vulnerabilities could also be explained through Microsoft’s wider popularity, which so far turned it into the perfect target for viruses.