Apple silently updated its Snow Leopard malware protection in this week’s Mac OS X 10.6.4 update, targeting a Trojan that disguises itself as iPhoto.
Though the new protection wasn’t specifically listed in any of Apple’s documentation accompanying Mac OS X 10.6.4, security firm Sophos discovered the update in the XProtect.plist file, which contains signatures of potential Mac threats. The new threat, dubbed HellRTS by Apple, has been distributed by hackers since April in the form of iPhoto.
Full Story: Apple quietly includes malware prevention update in Mac OS X 10.6.4 – AppleInsider