Apple updates OS X Lion, Snow Leopard malware definitions to address new trojan

Apple has updated “its malware definitions for Snow Leopard and Lion systems to allow them to recognize the trojan [OSX/Revir.A, OSX/Imuler.A],” Eric Slivka reports for MacRumors. “Apple updated its tools earlier this year in response to the MacDefender threat, and Snow Leopard and Lion system now automatically check for new malware definitions on a daily basis.”

“Apple’s battles with malware authors continue, however, as CNET discloses that another trojan horse, known as OSX/flashback.A, has been discovered,” Slivka reports. “Like a similar threat that surfaced early last month, the new trojan masquerades as a Flash Player installer to trick users into installing the package.”

Read more in the full article here.

MacDailyNews Take: Here’s our usual oft-repeated reminder for Mac users and anyone who’s trying to use any other platform: Do not download and authorize the installation of applications (Trojans) from untrusted sources. No OS can protect users from themselves (or we wouldn’t be able to install any software). Those who grant attackers access to their Macs, should not be surprised to find their Macs are compromised.

Related articles:
New OS X trojan horse sends screenshots, files to remote servers – September 23, 2011
Apple: How to avoid or remove MACDefender malware (permanent fix coming in Mac OS X update) – May 24, 2011
Apple: How to avoid or remove MACDefender malware (permanent fix coming in Mac OS X update) – May 24, 2011
MACDefender trojan protection and removal guide – May 20, 2011
Apple investigating ‘MACDefender’ trojan – May 19, 2011
Apple malware: 6 years of crying wolf – May 6, 2011
Is Mac under a virus attack? No. – May 4, 2011
Intego: MACDefender rogue anti-malware program attacks Macs via SEO poisoning – May 2, 2011
Sophos details new Mac OS X Trojan – February 28, 2011
Warning: Mac users beware of yet another trojan masquerading as video codec – June 11, 2009
CNN blows it; gets all worked up about a Mac Trojan that isn’t the first nor is it the last – April 23, 2009
Mac trojan expands to affect pirated versions of Photoshop CS4 – January 26, 2009
Intego: Mac trojan horse found in pirated Apple iWork ‘09 – January 22, 2009
New Mac OS X Trojan horse identified – June 23, 2008
Mac OS X Scareware trojan ‘MacSweep from Imunizator’ tries to scam Mac users – March 29, 2008
Mac trojan makers churn out slightly modified versions to evade anti-malware detection – November 08, 2007
Mac DNS Changer Trojan [OSX/Puper] relatively simple; works like the Windows version – November 01, 2007
New Mac OS X Trojan warning – February 16, 2006
Apple: ‘Opener’ is not a virus, Trojan horse, or worm – November 02, 2004

27 Comments

  1. I just loaded Lion last week and did an update. The latest malware definitions in Xprotect.meta.plist are 11 OCT.
    This seem right? How often are they updated even if checked every day.
    I have Firewall on highest setting. Will this prevent updates?

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