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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. macrumors 6502a


    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. macrumors demi-god


    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. macrumors demi-god


    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. macrumors 68020


    No Mac OS X payload is associated with this Java exploit so there is no need to worry about being infected.
  5. macrumors 6502a


    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. macrumors 68030


  7. macrumors demi-god


    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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