For nearly a month now some Apple Mac users have been unwittingly installing malware on their machines believing it to be anti-virus software. The scam worked by redirecting users from legitimate websites to fake websites which tell them that their Mac is infected with a virus. The user is then offered the MacDefender “anti-virus” software to solve the issue. Of course, this “anti-virus” software is in fact malware trying to get credit card information. The most common names for this malware are MacDefender, MacProtector and MacSecurity.
Until now Apple has remained characteristically silent but at last it has spoken and published a knowledge base article about MacDefender. In the document Apple say that in the coming days, it will deliver a Mac OS X software update that will automatically find and remove Mac Defender malware and its known variants. The update will also help protect users by providing an explicit warning if they download this malware.
In the mean time the document has a resolution section that provides step-by-step instructions on how to avoid or manually remove MacDefender.