Does anyone use extra antivirus software?

Discussion in 'Mac Basics and Help' started by iRach, Jan 10, 2010.

  1. iRach macrumors member

    iRach

    Joined:
    Dec 11, 2009
    #1
    I was wondering as I read Macs have to have virus' downloaded and wondered if the built in Firewall is enough.

    If so what do you recommend?

    Thank you
     
  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #3
    Viruses won't affect your system (trojans will if you let them, though) but a virus scanner is still useful if you send files to Windows machines. ClamXav works well.

    PS a firewall won't protect you on any system if you download malware yourself.
     
  3. MacDawg macrumors P6

    MacDawg

    Joined:
    Mar 20, 2004
    Location:
    "Between the Hedges"
    #4
    I don't

    But most recommendations will include ClamXav and iAntiVirus

    Stay away from Norton

    The best antivirus on the Mac is common sense and safe computing practices, especially where it concerns downloads

    Woof, Woof - Dawg [​IMG]
     
  4. iRach thread starter macrumors member

    iRach

    Joined:
    Dec 11, 2009
    #5
    Thanks, I asked 'cause husband's pc just found a trojan, made me a bit nervous as the mac is new and I'm new to macs.
     
  5. uberamd macrumors 68030

    uberamd

    Joined:
    May 26, 2009
    Location:
    Minnesota
    #6
    I also suggest ClamXav which is free and easy to use. I often use my Mac to scan Windows hard drives and USB drives to remove viruses and what not.
     
  6. NathanCH macrumors 65816

    NathanCH

    Joined:
    Oct 5, 2007
    Location:
    Stockholm, Sweden
    #7
    If you don't touch windows, no need what-so-ever. People claim there are viruses, but they have never been caught in the wild. If you want to waste money, buy virus protection for mac.
     
  7. iRach thread starter macrumors member

    iRach

    Joined:
    Dec 11, 2009
    #8
    Thanks for the replies everyone:)
    Is the the Clamxav version i should download? ClamXav 2.0.5 Public Beta
     
  8. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #9
    That's the upcoming version's beta, which means it's in development. I'd go with 1.1.1, but it probably doesn't matter that much.
     
  9. MacDawg macrumors P6

    MacDawg

    Joined:
    Mar 20, 2004
    Location:
    "Between the Hedges"
    #10
    Agreed
    With ClamXav, you are basically scanning for Windows viruses that might get passed on

    Woof, Woof - Dawg [​IMG]
     
  10. disconap macrumors 68000

    disconap

    Joined:
    Oct 29, 2005
    Location:
    Portland, OR
    #11
    This is true in EVERY POSSIBLE WAY with OSX. Norton has continually failed to provide any quality products for OSX whatsoever in my experience. Which is a shame, as they were basically the only company I'd ever trust with disc utilities and the like in OS7-9...
     
  11. broken-chaos macrumors regular

    broken-chaos

    Joined:
    Sep 2, 2009
    Location:
    Toronto, Ontario
    #12
    Trojans for OSX (not viruses or worms) have been, quite rarely, found in the wild -- such as the instance with the (pirated) iWork '08 download from a year or two back that had a trojan.

    Anyway, the difference between a trojan, a virus, and a worm (three major forms that malware takes):

    Trojan: A program that pretends to be something it's not -- for example, a download that claims to be a super-awesome screensaver, but actually makes your machine start sending out spam e-mails. These only ever occur as actual programs -- they just lie about what they do.

    Virus: An infected file that infects a computer, which can copy itself to other files -- for example, a Word document that, when opened, copies itself to your other Word documents, as well as starting to do something evil in the background. These can occur in (theoretically) any file, including programs, but are rather rare and often have to exploit vulnerabilities in third-party programs on the host OS.

    Worm: A program that is entirely, silently self-propagating, meaning it can, entirely automatically, copy itself to other computers, often by exploiting security vulnerabilities. These are also somewhat rare (though extremely wide-spreading and dangerous when they occur) and can sometimes be stopped cold by basic network security -- such as a firewall.

    A prerequisite for stopping any of these things is to keep your computer fully-patched, and all third-party programs you run up-to-date. Doing this will stop a large percent of viruses and worms (no matter what OS you're running) dead in their tracks.

    To avoid trojans, the best method is to only download software from trusted sources -- you'll have to determine for yourself who you can or cannot trust, though this can often be accomplished by a simple Google search or two. Trojans cannot be ever completely eliminated because they rely on the user to, in essence, do something stupid. All operating systems are vulnerable to trojans, and there isn't too much the OS can do about it (certainly not for home users). OSX does have a bit of protection built-in, mind you -- I believe Snow Leopard has a database of known OSX trojans (though it's trivial to write a new trojan), as well as having all the fanfare around quarantine and 'safe' files. There are too many trojans floating around to give a good example of a single one.

    Avoiding viruses is a little tricker, since they can masquerade as normal files. Viruses are somewhere between 'exceptionally rare' and 'totally unheard of' for OSX, so you likely don't have much to worry about anyway. Even Windows viruses have somewhat fallen to the sidelines, often in favour of trojans. The best security to avoid any threat of them, however, is to scan downloaded files (especially from questionable sources) with a basic virus scanner (such as the aforementioned clamXav). It's probably not necessary, to be honest, but may be a good habit to be in anyway. Most ISPs and e-mail providers do scanning for viruses sent by e-mail, so you'll most-likely be entirely safe with e-mailed files. I can't think of an example of a recent virus, though some of the recent Adobe Reader vulnerabilities tend to mimic viruses in all except the self-copying.

    Worms are the most difficult to avoid, if there's a vulnerability in a network service you use. The best protection you can do is to set your firewall on, all network services (in System Preferences -> Sharing) off, and turn your firewall onto stealth mode. Also, as I already mentioned, keep your computer fully patched. I've never heard of, even a proof-of-concept, OSX worm, and numbers of Windows worms have been declining with recent releases and patches. An example of a fairly-recent Windows worm is Conficker.

    I hope my lengthy rambling is useful to someone. :p
     
  12. iRach thread starter macrumors member

    iRach

    Joined:
    Dec 11, 2009
    #13
    Lengthly rambling always welcome.:)

    I thought about the ClamXav 2.0.5 Public Beta, because it said the other wasn't suitable for Snow leopard. Should I install the iAntivirus aswell, or just the Clamxav, and which version?

    Sorry for all the questions but this all out attack on the pc had made me nervous:(
     
  13. MacDawg macrumors P6

    MacDawg

    Joined:
    Mar 20, 2004
    Location:
    "Between the Hedges"
    #15
    Honestly, I wouldn't install either
    But if I had to choose, I would install ClamXav and just go with the Beta
    But don't install both, there is no reason
    I don't think you will have a problem either way

    Woof, Woof - Dawg [​IMG]
     
  14. Velin macrumors 65816

    Velin

    Joined:
    Jul 23, 2008
    Location:
    Hearst Castle
    #16
    You won't need it, firewall is more than sufficient.
     
  15. iRach thread starter macrumors member

    iRach

    Joined:
    Dec 11, 2009
    #17
    Thank you for all your help, very much appreciated :)
     
  16. Tumbleweed666 macrumors 68000

    Joined:
    Mar 20, 2009
    Location:
    Near London, UK.
    #18
    Bear in mind that Clam will not do anything about protecting your Mac, it may protect PC's to which you might send an email, which you received from another PC user, that had a virus - a long chain there, plus if those PC's dont have antivirus they will already be multiply infected, so whats the point? That virus BTW wont do anything at all to the Mac.

    iAntivirus says 'it protects against Mac viruses' but since there arent any, its as effective as my cat in that respect.

    Your husbands PC got a trojan either because (a) the tool he used falsely identified an application as a trojan when it wasn't (this isn't uncommon), or (b) he downloaded and installed a program from a compromised source. He'd do better to be more careful about what he installs, and if you are, you dont need any additional programs to monitor. If you arent going to be downloading and installing applications from dubious websites, you dont need anything that looks for Trojans, full stop. (Mac already does this anyway)
     
  17. iRach thread starter macrumors member

    iRach

    Joined:
    Dec 11, 2009
    #19
    Thanks, I rarely download anything and never anything I'm not totally sure of, even double checked with you all about downloading ClamXav! The odd thing is he hasn't downloaded anything apart a font from dafont, it appeared and removed his desktop picture and everytime he clicks on a website it redirects him to somewhere else. Sound familiar to anyone?
     
  18. itsbrad macrumors newbie

    Joined:
    Jan 2, 2010
    #20
    Eh, I go to some shady websites so just for peace of mind I installed a Norton that I already had.
     
  19. Tumbleweed666 macrumors 68000

    Joined:
    Mar 20, 2009
    Location:
    Near London, UK.
    #21
    http://forum.zazzle.co.uk/misc/warning_dangerous_font_site_dafont_com

    "WARNING: DANGEROUS FONT SITE!!!! (DAFONT.COM)"
     
  20. iRach thread starter macrumors member

    iRach

    Joined:
    Dec 11, 2009
  21. Ardoptres macrumors regular

    Joined:
    Dec 12, 2009
    #23
    I've used ClamXav in the past and found about 2 infected files so far. I don't know if they've ever done anything, bad at least they're gone now..
     
  22. Tumbleweed666 macrumors 68000

    Joined:
    Mar 20, 2009
    Location:
    Near London, UK.
    #24
    Well they certainly wont have done anything to your Mac. You might want to inform the source, if it was a friend or company you know who sent it, that their Windows PC is infected.
     
  23. Vortexboy macrumors newbie

    Joined:
    Mar 24, 2010
    #25
    Should I get something more to actually delete viruses?

    My Mac has been behaving strangely of late, such as:

    1. Being very slow to respond to mouse clicks
    2. It takes several seconds or more to react
    3. Screen draws are slow
    4. The application icon in the dock (such as Firefox) "stutters" or bounces a bit erratically as the program loads, etc.

    The fan seems to be running all the time too.

    I have Macscan and ran it but it didn't find anything.
    Then I read about ClamXav and ran this program on my system, apps and utlis folders.

    It found about 120 files with WM.Cap.A., which I found out is a virus that affects macros in Word files (which I don't have any of).
    It also quarantined about 50 emails which I also deleted.

    I deleted the documents (some of which I didn't want to and can't recreate) but now I am concerned and since ClamXav doesn't remove viruses, should I get something like Kapersky to protect my computer?

    I've had my Mac for about 6 years and have not had any problems like this, so I am puzzled why this has happened now?
     

Share This Page