How do you know your computer was infected with Java zero day exploit?

Discussion in 'OS X Mountain Lion (10.8)' started by clukas, Jan 17, 2013.

  1. clukas macrumors 6502a


    May 3, 2010
    With all the latest scares and tips how to protect yourself against the evil java zero day exploit, I have not found any information or tutorials how to check whether your mac has been compromised.

    I am using sophos antivirus for mac, and completed a recent scan with everything coming back clean, but how can you actually be sure that a mac is not compromised through the java exploit?
  2. GGJstudios macrumors Westmere


    May 16, 2008
    There is no specific exploit called "zero day exploit". A Zero day virus or attack or exploit refers to a previously unknown computer malware or exploit. No app can protect against a zero day exploit or malware, because they don't know what to look for.

    I recommend avoiding Sophos, as it can actually increase a Mac's vulnerability, as described here and here. 3rd party antivirus apps are not needed to keep a Mac malware-free, as long as the user practices safe computing, as described in the following link (includes avoidance of Java-based attacks).
    If anyone insists on running antivirus for some reason, ClamXav (which is free) is one of the best choices, since it isn't a resource hog, detects both Mac and Windows malware and doesn't run with elevated privileges.
  3. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    It sounds like you are referring to this new malware called Mal/JavaJar-B. There aren't any reports of it hitting OS X systems yet, so you are probably okay.

    It looks like Sophos already updated their scanner with this malware signature, so if you have updated Sophos and done a scan, you are in good shape.
  4. munkery macrumors 68020


    Dec 18, 2006
    No Mac OS X payload is associated with this Java exploit so there is no need to worry about being infected.
  5. clukas thread starter macrumors 6502a


    May 3, 2010
    Thanks for the responses. Whilst I do know that there is no virus called zero day exploit itself I didn't know how to formulate the question better.
  6. SlCKB0Y macrumors 68040


    Feb 25, 2012
    Sydney, Australia
  7. GGJstudios macrumors Westmere


    May 16, 2008
    As stated in that article:
    The amount of OS X malware in the wild is extremely low, providing very little historical data. As for a virus threat, since there has never been a Mac OS X virus in the wild, there is no historical data on which to base heuristic analysis.

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