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Apple admits Mac scareware infections

Apple on Tuesday promised an update for Mac OS X that will find and delete the MacDefender fake security software, and warn still-unaffected users when they download the bogus program.

The announcement — part of a new support document that the company posted late Tuesday — was the company’s first public recognition of the threat posed by what security experts call “scareware” or “rogueware.”

“In the coming days, Apple will deliver a Mac OS X software update that will automatically find and remove Mac Defender malware and its known variants,” Apple said in the document. “The update will also help protect users by providing an explicit warning if they download this malware.”

Apple also outlined steps that users with infected Macs can take to remove the scareware.

Andrew Storms, director of security operations with nCircle Security, was surprised that Apple said it would embed a malware cleaning tool in Mac OS X.

“That’s new ground for Apple,” Storms said, pointing out that the move is a first for the company, which until now has only offered a bare-bones malware detection mechanism in Mac OS X 10.6, aka Snow Leopard, and then only populated it with a handful of signatures.

“Not only is Apple going to help customers remove [Mac Defender], but by doing so, they’re also admitting that there are security problems with Mac OS,” Storms said.

MacDefender — which also goes by names such as MacProtector and MacSecurity — first popped up earlier this month when French security company Intego said it had found the scareware in the wild.

Scareware and rogueware are terms for bogus security software that claims a personal computer is heavily infected with worms, viruses and other malware. Once installed, such software nags users with pervasive pop-ups and fake alerts until they fork over a fee to purchase the worthless program.

MacDefender was the first piece of professional-looking scareware to target Macs.