Apple computers infected by Flashback Trojan

Apples are no longer immune from infection. About half a million Apple computers have been infected with the Flashback Trojan, according to a Russian anti-virus firm. An investigation by Dr Web says that about 600,000 Macs – half of them in the US – have installed the malware – potentially allowing them to be hijacked and used as a “botnet.” While Apple has released a security update, users who have not installed it remain vulnerable. Flashback was first detected in September 2011 when anti-virus researchers discovered software masquerading as a Flash Player update. Once downloaded it deactivated some of the computer’s security software.

More details from BBC.