Mac OS X also hit by Trojan in pirated PhotoShop CS4

Last week it was reported that a pirated version of Apple's iWork '09 is infected with a Trojan horse, and this week it's been unveiled that there's also a Trojan in a pirated version of PhotoShop CS4 for Apple's Mac OS X. Pirates who downloaded the infected PhotoShop CS4 version are hit by the OSX.Trojan.iServices.B Trojan which enables hackers to take over your Mac.

The first Trojan was found Wednesday in versions of Apple's iWork 09 productivity software downloaded from the Internet using the peer-to-peer service BitTorrent, and also found on some Web sites.

The second, a variant of the first, was discovered Sunday hidden inside bootlegged copies of Adobe Systems' Photoshop CS4 For Mac.

Once installed, software hidden inside both programs lets someone else take remote control of the computer. It was difficult to assess Tuesday whether machines downloading the bootlegged software were damaged, and to what extent. About 20,000 people have so far downloaded the suspect iWork 09 software, while more than 5,000 downloaded the pirated Photoshop, estimates security provider Intego Inc. of Austin, Texas.

In this case only pirates are hit, but it does illustrate that antivirus software isn't a luxury on Apple's Mac.