System is "infected"-iMac OSx

Discussion in 'macOS' started by ssforcey, May 2, 2011.

  1. ssforcey macrumors newbie

    Joined:
    May 2, 2011
    #1
    Yesterday my iMac started popping up with some fabulous family "unfriendly" material. I've downloaded a couple free anti-viruses from download.com; nothing is showing up. Although the MacDefender thing that keeps popping up says there are plenty of things showing up...viruses, "dialers" and spy stuff. I really am not able to pay the $40+ to take care of the problem. Any tips?

    Thanks :D
     
  2. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #2
    Go to Utilities > Activity Monitor, find MacDefender, and Force Quit. I'm not sure how to actually remove it properly, but that will at least unload it (until reboot?)

    Someone else should be able to give advice on how to remove it.
     
  3. cocacolakid, May 2, 2011
    Last edited: May 2, 2011

    cocacolakid macrumors 65816

    cocacolakid

    Joined:
    Dec 18, 2010
    Location:
    Chicago
    #4
    MacDefender itself is the infection.

    Read that link above and follow the directions to remove MacDefender.

    The full release from the real security firm that discovered it first is here. There are many more screenshots of the phony program at that link.

    Also, and this is a good idea for every Mac user, go into the preferences for Safari, under General, and uncheck "Open Safe Files After Download". That will prevent this infection from automatically downloading and launching if you are on an infected website.

    The Intego website says, "If a browser asks you if you want to run an installer when you did not expect to download an installer, always click the No or Cancel button."
     
  4. adcx64 macrumors 65816

    adcx64

    Joined:
    Nov 17, 2008
    Location:
    Philadelphia
    #5
    Crazy, I just hear of mac defender this afternoon here on MR and already it's infecting people!
     
  5. Nameci macrumors 68000

    Nameci

    Joined:
    Oct 29, 2010
    Location:
    The Philippines...
    #6
    Be wary of what you are downloading from the internet. Usually I don't randomly download stuff from the internet.
     
  6. cocacolakid macrumors 65816

    cocacolakid

    Joined:
    Dec 18, 2010
    Location:
    Chicago
    #7
    MacDefender is a "hit and run" infection, if you happen to surf to a website that is infected, MacDefender will automatically exploit your browser and try to download itself. Once downloaded you get pop up messages saying you are infected, and then a MacDefender box pops up claiming your anti-virus protection has expired and to enter your credit card info to renew it for 1 year, 2 years, or lifetime subscription.

    But a user doesn't even have to initiate the download, it starts all by itself.

    I'd recommend everyone read that link I posted above, see pics and know what this looks like, and follow the suggestions to at least make Safari safer against this particular threat by unchecking the "Open Safe Files After Download" box.
     
  7. Nameci macrumors 68000

    Nameci

    Joined:
    Oct 29, 2010
    Location:
    The Philippines...
  8. goMac macrumors 603

    Joined:
    Apr 15, 2004
    #9
    MacDefender is the virus. You've been conned.
     
  9. MacHamster68 macrumors 68040

    MacHamster68

    Joined:
    Sep 17, 2009
    #10
    just do not download it , ok it does not cause any harm as long as you dont put in your credit card details , but apart from that this thing is really harmless
     
  10. Diesel-Benz macrumors member

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    Apr 17, 2011
  11. zen.state, May 3, 2011
    Last edited by a moderator: May 3, 2011

    zen.state macrumors 68020

    zen.state

    Joined:
    Mar 13, 2005
    #12
    This thread is proof that an uninformed and not very tech savvy person is easily their own worst enemy. Far more of a danger to themselves than any type of malware or "virus".

    For many of these people their computer is actually better off to be a zombie system for someone else.

    Download.com is the worst place on the net to find free apps for Mac that are worthy of hard drive space. Use macupdate.com and read user reviews of apps before using them.

    There is a whole internet full of information out there. Go learn..
     
  12. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #13
    It's not infecting people. And it can't "infect" a Mac, unless the user is foolish enough to actively install it.
    It's not a virus. It's not even malware, despite what an antivirus firm calls it, who simply wants to trick people into buying their useless software. It's simply an app installer that automatically launches. The user has complete control over whether it gets installed or not.

    There has never been a virus in the wild that affects Mac OS X since it was released 10 years ago. The handful of trojans that exist can be easily avoided with some education and common sense and care in what software you install:
     
  13. SkippyThorson, May 3, 2011
    Last edited by a moderator: May 3, 2011

    SkippyThorson macrumors 65816

    SkippyThorson

    Joined:
    Jul 22, 2007
    Location:
    Utica, NY
    #14
    You always beat me to it. I knew an "Infected" thread would call this a "virus".

    I have to say, through this thread, even though I'm always extremely cautious in downloading things, I didn't know about that Safari option. Glad (GLaD? :p) I learned that today.
     
  14. Consultant macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #15
    Exactly. It's just a trojan that tricked the user into installing it.
     

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