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A Trojan recently made the rounds for Mac that appeared to be an update for Flash, but was actually a piece of malicious software called Flashback.A. Apple has since updated XProtect to block this dangerous piece of software from infecting your Mac, but the bad kind of hackers will not be stopped, and they brought out an even more malicious piece of software that actually manages to prevent XProtect from updating, thus stopping future viruses from being detected. This new Trojan is called Flashback.C.

Basically, this Trojan overwrites XProtectUpdater files preventing the program from updating and finding new threats that need to be handled. This opens your Mac to a wide of range of possibly threatening software and attacks.

Right now it isn’t clear what this Trojan is actually trying to do, but it is able to connect to a remote host and run other pieces of code. It seems more like it is setting up for future attacks, and not doing the attacking itself. Either way, this cannot end well if it ends up on your system.

Please, make sure to only update your software from a source you trust, or better still, from the official site of the software developer. This practice applies to pretty much any piece of software, but it applies especially to flash now.

Source: MacRumors

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  1. Donnell King
    October 28, 2011 at 4:03 am

    Is there anything to do if you suspect the infection, other than to wait for Apple to update XProtect? My definition file hasn't been updated since Oct. 11, and turning off the automatic update and then turning it back on doesn't seem to have changed that. Thanks!

    • Dave LeClair
      November 12, 2011 at 7:37 pm

      I honestly don't have an answer at this point, I would recommend posting in http://www.makeuseof.com/answers and I'm sure one of the experts in there will offer a helping hand!

  2. mick register
    October 20, 2011 at 4:57 pm

    Hahaha
    This is the first real Mac virus I have heard of.
    While I am not happy for viruses, I am a strong supporter of Windows based PCs. Many MAC users I know cling to their overpriced toys, and use the "No Viruses" slogan as one of the primary reasons to have a MAC. Now I can combat that, Thanks Dave!

    Ps: Oh you play X-Box do you? nice.

    • Sabel
      October 20, 2011 at 5:57 pm

      We Mac users know that in fact viruses exist for this OS, but are less frequent here that in Windows based PC's. People saying that there are no viruses in Mac are simply morons who don't know their system.

      • Keiira
        October 20, 2011 at 6:34 pm

        THANK YOU!! WELL SAID!

      • Duane
        October 20, 2011 at 8:14 pm

        Sabel, that is true. I am a Mac user since 1984 and any claims to their being 'perfect' are untrue. They get more viruses now that in the past and the have problems right out of the box like any piece of technology. I would never give my Mac up though.

    • Dave LeClair
      October 21, 2011 at 1:43 pm

      You're welcome, happy to help. I'm a Mac and PC user, so I have no loyalty myself. Still, go fight the good fight!

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