Title : 'First' Mac OS X Trojan Sighted 
Date : 2006-02-16 
Code : Antivirus researchers have discovered what's claimed to be the <a href="http://www.theregister.co.uk/2006/02/16/mac_os-x_virus/" target="_blank">first computer Trojan to infect Apple Mac OS X computers</a>. The malware, dubbed <a href="http://www.sophos.com/virusinfo/analyses/osxleapa.html" target="_blank">Leap-A</a>, spreads via the iChat instant messaging system as a file called latestpics.tgz that infected machines send to contacts on an infected user's buddy list. The malicious file, which poses as a set of pictures, is a compressed Unix shell program. The user is prompted for admin credentials to launch the malicious code, which is better described as a Trojan than a virus. Mac OS X users who do this will find their machines infected. 
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