Mac's Most Common Malwares Detected by Sophos

MUMBAI / BANGALORE, India – November 22, 2010 – IT security and control firm,Sophos, earlier this month launched its free Mac anti-virus for home users.  The product now has 150,000 active users and Sophos has analysed the most commonly encountered malware that Mac users are seeing. The top 20 most commonly detected malware from just under 50,000 malware reports from users of Sophos Anti-Virus for Mac Home Edition between Nov 2nd and Nov 16th 2010 are listed below –


Malware Percentage of reports
Mal/ASFDldr-A 4.62%
Troj/Javadl-V 3.67%
Mal/JavaKC-G 2.96%
Mal/JavaKC-E 2.36%
Troj/KeygenD-P 1.59%
Mal/JavaHU-A 1.36%
Mal/JavaK-CI 1.35%
Troj/JavaDL-X 1.21%
Troj/Bytever-G 1.11%
Mal/JavaHibis-A 1.06%
Mal/JavaK-CK 1.03%
OSX/Jahlav-C 0.98%
Troj/JavaDL-J 0.96%
OSX/DNSCha-E 0.95%
Mal/Javasnd-C 0.91%
Macl/Conficker-A 0.80%
Troj/JavaDL-W 0.76%

Many of the threats detected are Windows-specific threats that do not attack Mac OS X directly, but can be transferred by Mac machines to other platforms.  However, this list also shows some Mac OS X-specific Trojans, that are typically disguised by hackers on BitTorrent sites, or planted on websites as alluring downloads or plugins to view videos, and platform-independent Java attacks.


Mac users can no longer afford to keep their heads in the sand when it comes to protecting their machines,” said Graham Cluley, Senior Technology at Sophos.  “So long as Mac users don’t properly defend themselves, they will increasingly be perceived as a soft target by cybercriminals and we will therefore see the volume of Mac-specific malware continue to rise.  It’s reassuring that we’ve been receiving feedback from users who were surprised to find malware on their beloved Macs. Hopefully, more and more Mac users will start to realise that security isn’t just an issue for PC users and they will start to take more measures to protect their computers.


Sophos is offering free anti-virus for Mac home users and it can be downloaded from its website –


More information, including images, can be found on Sophos’s Naked Security blog at –


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About Sophos

More than 100 million users in 150 countries rely on Sophos as the best protection against complex threats and data loss. Sophos is committed to providing security and data protection solutions that are simple to manage, deploy and use, and that deliver the industry’s lowest TCO. Sophos offers award-winning encryption, endpoint security, web, email, and network access control solutions backed by SophosLabs-a global network of threat intelligence centers. With more than two decades of experience, Sophos is regarded as a leader in security and data protection by top analyst firms and has received many industry awards. Sophos is headquartered in Oxford, UK and Boston, US. More information is available at



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