Found viruses?

Discussion in 'Mac OS X Lion (10.7)' started by salute11, Apr 10, 2012.

  1. salute11 macrumors newbie

    Oct 17, 2011
    Spurred on by the rumors of viruses infecting Macs, I downloaded Dr. Web Light from the App store and had it scan my mac. The app was suggested in several news articles about the virus. It brought up a bunch of hits, all called "BATCH.virus". I tried Googling this virus, and the only thing that comes up seem to be just prank viruses or something. Does anyone know anything about these? I don't want to just delete them without checking them out first.

    Also, it came up with "Trojan.Spambot.7934" threat in a file called "". I remember hearing something about that a couple months ago - a fake Hallmark virus I think? Just want to check that one out too.

    Thanks for your help.
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Those are Windows malware, and they cannot affect your Mac in any way. Simply delete them.

    Macs are not immune to malware, but no true viruses exist in the wild that can run on Mac OS X, and there never have been any since it was released over 10 years ago. The only malware in the wild that can affect Mac OS X is a handful of trojans, which can be easily avoided by practicing safe computing (see below). Also, Mac OS X Snow Leopard and Lion have anti-malware protection built in, further reducing the need for 3rd party antivirus apps.
    1. Make sure your built-in Mac firewall is enabled in System Preferences > Security > Firewall

    2. Uncheck "Open "safe" files after downloading" in Safari > Preferences > General

    3. Uncheck "Enable Java" in Safari > Preferences > Security. Leave this unchecked until you visit a trusted site that requires Java, then re-enable only for your visit to that site. (This is not to be confused with JavaScript, which you should leave enabled.)

    4. Check your DNS settings by reading this.

    5. Be careful to only install software from trusted, reputable sites. Never install pirated software. If you're not sure about an app, ask in this forum before installing.

    6. Never let someone else have access to install anything on your Mac.

    7. Don't open files that you receive from unknown or untrusted sources.

    8. Make sure all network, email, financial and other important passwords are complex, including upper and lower case letters, numbers and special characters.

    9. Always keep your Mac and application software updated. Use Software Update for your Mac software. For other software, it's safer to get updates from the developer's site or from the menu item "Check for updates", rather than installing from any notification window that pops up while you're surfing the web.
    That's all you need to do to keep your Mac completely free of any virus, trojan, spyware, keylogger, or other malware. You don't need any 3rd party software to keep your Mac secure.

    If you're going to run any antivirus app, ClamXav 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. You can run scans when you choose, rather than leaving it running all the time, slowing your system. ClamXav has a Sentry feature which, if enabled, will use significant system resources to constantly scan. Disable the Sentry feature. You don't need it. Also, when you first install ClamXav, as with many antivirus apps, it may perform an initial full system scan, which will consume resources. Once the initial scan is complete, periodic on-demand scans will have much lower demands on resources.
  3. salute11 thread starter macrumors newbie

    Oct 17, 2011
    Thank you for your help!

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