12 Replies Latest reply: May 20, 2014 6:26 PM by MadMacs0
Iamawesome997 Level 1 Level 1 (0 points)

Hi,

I have a MacBook Pro running the latest build of Mac OS X 10.8.4. Mountain Lion complete with all the security updates and patches.

I do not have Flash or Java 7 installed, but I do have a Java 6 runtime used for playing Minecraft.

I have an antivirus from Intego installed as I fear the flashback trojan.

Now, I have taken even more safety precautions and uninstalled Flash and Java 7 from my computer.

Since I no longer have these devil spawns on my system, do I still need the anitvirus?

It is taking up alot of CPU to continue runnning in the background and I am considering uninstalling it.


MacBook Pro, OS X Mountain Lion (10.8.3), 13" Entry level model, uses an SSD
  • 1. Re: Macs and antivirus
    mende1 Level 10 Level 10 (89,570 points)

    OS X has got its own security systems, so you don't need any antivirus. See > http://www.thesafemac.com/mmg If you tell us the name of the antivirus, I can give you the steps to delete it.

     

    As you are running Java 6, you have to keep it updated. Apple provides Java updates, so open  > Software Update to install the most recent Java version. Also, you can disable Java if you aren't using it. Open Safari, go to Safari menu (on the menu bar) > Preferences > Security, and disable Java

  • 2. Re: Macs and antivirus
    Axeman1020 Level 6 Level 6 (13,235 points)

    It certainly doesn't hurt to have antivirus software. I am not familiar with Intego but I use AVAST for Mac. It is light on resources and free.

  • 3. Re: Macs and antivirus
    Barney-15E Level 8 Level 8 (35,295 points)

    Have you checked intego's website on how to uninstall.

    Also, in the new versions of Safari, you can configure specific sites to allow Java web start, so you could set it to only allow Minecraft.

  • 4. Re: Macs and antivirus
    John Galt Level 8 Level 8 (36,425 points)

    Axeman1020 wrote:

     

    It certainly doesn't hurt to have antivirus software.

     

    Any software you install can have undesirable consequences. This is especially true of third party anti-virus software.

     

    The overwhelming majority of non-hardware related Mac problems reported on this site are the direct result of using such junk.

  • 5. Re: Macs and antivirus
    Kurt Lang Level 7 Level 7 (31,995 points)

    I have an antivirus from Intego installed as I fear the flashback trojan.

    Anti-virus software is just about useless against Flashback. You're also in fear of something that has been dead for over a year. Main points:

     

    1) Apple has already updated the both the OS itself and Java 6 against Flashback.

     

    2) Really, really simple solution that doesn't require the installation of any AV software, even when Flashback was running rampant for a few weeks. Go into your browser's preferences and turn off Java. That's it. If you have some site you regularly visit that won't function correctly with Java off, turn it on when you need it, then turn it back off.

     

    JavaScript, despite the similar name, is completely safe. Leave that on.

     

    Any real time AV software, no matter who the vendor, is very resource intensive and will slow any computer down. Doesn't matter what OS you're talking about. Get rid of it.

  • 6. Re: Macs and antivirus
    Topher Kessler Level 6 Level 6 (9,340 points)

    AV software will not adversely affect your system any more than any other software package you install, including OS X itself. More people have had more problems installing and configuring OS X than have had issues with a healthy OS installation running an antivirus package.

     

    While the need for the software is debatable, should you feel safer with it then there are ways to configure the software of your choosing to have a minimal impact on your computer. I have been running Sophos on my systems for years, without a single problem. I have also installed the latest versions of the notorious MacKeeper software (mainly to test ongoing claims of how it harms the system) and have not experienced any problems with it either, after now of over three months of use.

  • 7. Re: Macs and antivirus
    MadMacs0 Level 4 Level 4 (3,735 points)

    Iamawesome997 wrote:

     

    I have an antivirus from Intego installed as I fear the flashback trojan.

    The Flashback Trojan/Backdoor has been extinct for a year now, according to Intego Labs and a couple of others, so that specific issue should not be a concern to you. That isn't to say that new malware won't come along to take advantage of another Java or other vulnerability, so I'm sure you are sensitive to how important it is to keep Java 6 and OS X fully up-to-date.

     

    But it's not clear how much longer Oracle and Apple will continue to maintain Java 6, as it has technically been at end-of-life (meaning no more public support) since the end of February, so switching to Java 7 is your future.

     

    Although many so called "Security Suite" software provide processes which they hope will catch the "Zero-Day" (currently unknown) malware, I have yet to read that any have been successful. They certainly were not with Flashback, so you need to decide for yourself whether any adverse affects to your computer are worth the protection provided.

  • 8. Re: Macs and antivirus
    Kurt Lang Level 7 Level 7 (31,995 points)

    I have yet to read that any have been successful.

    Yes! That is a major point regarding any AV software. They can only catch known threats, or unknown threats which are variations of those which are already in their definitions. If something entirely new comes along, no AV software will catch it, no matter how up to date it is. Until the definitions are updated and distributed to recognize the new malware, AV software is completely useless against it.

  • 9. Re: Macs and antivirus
    Topher Kessler Level 6 Level 6 (9,340 points)

    Some have heuristical/behavioral analaysis and other proactive measures, but these do run blindly and are only a matter of guesswork on the program's part. They also can throw so many false positives that they can become unreliable; however, they do exist to potentially catch "unknown" threats. Nevertheless, the vetted use of AV software is to scan for known malware through established definitions.

  • 10. Re: Macs and antivirus
    Linc Davis Level 10 Level 10 (118,480 points)

    1. This comment applies to malicious software ("malware") that's installed unwittingly by the victim of a network attack. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the victim's computer. That threat is in a different category, and there's no easy way to defend against it. If you have reason to suspect that you're the target of such an attack, you need expert help.
      
    If you find this comment too long or too technical, read only sections 5, 6, and 10.
      
    OS X now implements three layers of built-in protection specifically against malware, not counting runtime protections such as execute disable, sandboxing, system library randomization, and address space layout randomization that may also guard against other kinds of exploits.

    2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user, but internally Apple calls it "XProtect." The malware recognition database is automatically checked for updates once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
       
    The following caveats apply to XProtect:
    • It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets.
    • It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
    3. Starting with OS X 10.7.5, there has been a second layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't necessarily been tested by Apple, but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. That may not mean much if the developer lives in a country with a weak legal system (see below.)
       
    Gatekeeper doesn't depend on a database of known malware. It has, however, the same limitations as XProtect, and in addition the following:
    • It can easily be disabled or overridden by the user.
    • A malware attacker could get control of a code-signing certificate under false pretenses, or could simply ignore the consequences of distributing codesigned malware.
    • An App Store developer could find a way to bypass Apple's oversight, or the oversight could fail due to human error.
    For the reasons given above, App Store products, and other applications recognized by Gatekeeper as signed, are safer than others, but they can't be considered absolutely safe. "Sandboxed" applications may prompt for access to private data, such as your contacts, or for access to the network. Think before granting that access. OS X security is based on user input. Never click through any request for authorization without thinking.
           
    4. Starting with OS X 10.8.3, a third layer of protection has been added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update the OS. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) MRT also runs when you install or update the Apple-supplied Java runtime (but not the Oracle runtime.) Like XProtect, MRT is presumably effective against known attacks, but maybe not against unknown attacks. It notifies you if it finds malware, but otherwise there's no user interface to MRT.
     
    5. XProtect, Gatekeeper, and MRT reduce the risk of malware attack, but they're not absolute protection. The first and best line of defense is always your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.
        
    That means, in practice, that you never use software that comes from an untrustworthy source, or that does something inherently untrustworthy. How do you know what is trustworthy?
    • Any website that prompts you to install a “codec,” “plug-in,” "player," "extractor," or “certificate” that comes from that same site, or an unknown one, is untrustworthy.
    • A web operator who tells you that you have a “virus,” or that anything else is wrong with your computer, or that you have won a prize in a contest you never entered, is trying to commit a crime with you as the victim. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
    • Pirated copies or "cracks" of commercial software, no matter where they come from, are unsafe.
    • Software of any kind downloaded from a BitTorrent or from a Usenet binary newsgroup is unsafe.
    • Software that purports to help you do something that's illegal or that infringes copyright, such as saving streamed audio or video for reuse without permission, is unsafe. All YouTube "downloaders" are in this category, though not all are necessarily harmful.
    • Software with a corporate brand, such as Adobe Flash Player, must be downloaded directly from the developer’s website. If it comes from any other source, it's unsafe.
    • Even signed applications, no matter what the source, should not be trusted if they do something unexpected, such as asking for permission to access your contacts, your location, or the Internet for no obvious reason.
    6. Java on the Web (not to be confused with JavaScript, to which it's not related, despite the similarity of the names) is a weak point in the security of any system. Java is, among other things, a platform for running complex applications in a web page, on the client. That was always a bad idea, and Java's developers have proven themselves incapable of implementing it without also creating a portal for malware to enter. Past Java exploits are the closest thing there has ever been to a Windows-style virus affecting OS X. Merely loading a page with malicious Java content could be harmful.
      
    Fortunately, client-side Java on the Web is obsolete and mostly extinct. Only a few outmoded sites still use it. Try to hasten the process of extinction by avoiding those sites, if you have a choice. Forget about playing games or other non-essential uses of Java.
       
    Java is not included in OS X 10.7 and later. Discrete Java installers are distributed by Apple and by Oracle (the developer of Java.) Don't use either one unless you need it. Most people don't. If Java is installed, disable itnot JavaScript — in your browsers.
       
    Regardless of version, experience has shown that Java on the Web can't be trusted. If you must use a Java applet for a task on a specific site, enable Java only for that site in Safari. Never enable Java for a public website that carries third-party advertising. Use it only on well-known, login-protected, secure websites without ads. In Safari 6 or later, you'll see a lock icon in the address bar with the abbreviation "https" when visiting a secure site.

    Follow the above guidelines, and you’ll be as safe from malware as you can practically be. The rest of this comment concerns what you should not do to protect yourself from malware.

    7. Never install any commercial "anti-virus" or "Internet security" products for the Mac, as they all do more harm than good, if they do any good at all. Any database of known threats is always going to be out of date. Most of the danger is from unknown threats. If you need to be able to detect Windows malware in your files, use the free software  ClamXav— nothing else.
      
    Why shouldn't you use commercial "anti-virus" products?
    • Their design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere.
    • In order to meet that nonexistent threat, the software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
    • By modifying the operating system, the software itself may create weaknesses that could be exploited by malware attackers.
    8. ClamXav doesn't have these drawbacks. That doesn't mean it's entirely safe. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.
        
    ClamXav is not needed, and should not be relied upon, for protection against OS X malware. It's useful only for detecting Windows malware. Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else.
        
    A Windows malware attachment in email is usually easy to recognize. The file name will often be targeted at people who aren't very bright; for example:
      
    ♥♥♥♥♥♥♥♥♥♥♥♥♥♥!!!!!!!H0TBABEZ4U!!!!!!!.AVI♥♥♥♥♥♥♥♥♥♥♥♥♥♥.exe
       
    ClamXav may be able to tell you which particular virus or trojan it is, but do you care? In practice, there's seldom a reason to use ClamXav unless a network administrator requires you to run an anti-virus application.
      
    9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use in the Sharing preference pane. All are disabled by default.
        
    10. As a Mac user you don't have to live in fear that your computer is going to be infected every time you install an application, read email, or visit a web page. But neither should you have the false idea that you will always be safe, no matter what you do. The greatest harm done by security software is precisely its selling point: it makes people feel safe. They may then feel safe enough to take risks from which the software doesn't protect them. Nothing can lessen the need for safe computing practices.

  • 11. Re: Macs and antivirus
    crissy murphy Level 1 Level 1 (0 points)

    is minecraft with out any mods a virus

  • 12. Re: Macs and antivirus
    MadMacs0 Level 4 Level 4 (3,735 points)

    crissy murphy wrote:

     

    is minecraft with out any mods a virus

    Like all software, it would depend on where you got it from. As long as you download software from a legitimate developer's site, the AppStore or a reputable site such as MacUpdate, then there is little to no danger of finding a Virus or any other Malware that would impact OS X.

     

    If you elect to use BitTorrent distribution systems then there is a good chance of downloading some sort of Malware, although it would most probably be for Windows computer systems. Some sites such as Softonic and C|Net's download.com installers include Adware, annoying but not malicious.