Virus on my Mac?

Discussion in 'macOS' started by raquel2010, Oct 20, 2010.

  1. raquel2010 macrumors newbie

    Joined:
    Oct 20, 2010
    #1
    I just got a MAC in August because I was told they are "virus free"... but now I have a virus on my computer and I don't know what to do. I think it is related to my yahoo account. Sometimes the screen will get black and it will say "Movies - Front Row ... " and some other options. Then it will get normal again. When I send emails to multiple contacts, a lot of wierd symbols appear under the email addresses. I use an unsecured network in the building. This is also worrying me. Can other people see what I am doing? Could they have access or have installed a virus in my computer? I already installed the CLAMX, it got two viruses, but this "movie" thing keeps appearing and the email contacts is still the same. I'm worried about buying an anti virus online because of this problem.

    Please help!

    Thank you!
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    There ARE no viruses that run on current Mac OS X, so no, you don't have a virus. Read this: Mac Virus/Malware Info
    That's most likely because you have accidentally launched Front Row, which is an app that comes with your Mac. You may have done this by pressing Command+Esc
    What application are you using to send email? Mail.app? Safari?
    Extremely unlikely, unless you've expressly given them access to your system. If you don't know how to do this, then you probably haven't.
    They can't install a virus because none exist. They also can't install apps without your admin password.
    If ClamXAV found a virus, it's a Windows virus and won't run on your Mac.
    You don't need AV software on your Mac. You just need to understand what's happening.
     
  3. raquel2010 thread starter macrumors newbie

    Joined:
    Oct 20, 2010
    #3
    Thanks for all your help. I'm happy to hear that the "Front Row" thing isn't a virus - I really don't know much about macs!

    I'm using Yahoo Mail - I've changed my password, but the symbols that appear when I send an email do worry me. About three weeks ago I had a bunch of empty emails sent to my email, I tried deleting htme, but they wouldn't delete. Then all of a sudden the were gone and these symbols started appearing when I send email messages.

    I downloaded the Open Office , Skype, a thing called "Perian" which I already deleted (I thought I needed it to watch this movie).

    Thanks for your help - I was really getting desperate.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Welcome to Mac ownership! Helpful Information for Any Mac User
    Make sure your email password is complex, with numbers and letters. What browser were you using? Safari? Firefox?
    All of those apps are quite safe. For the most part, the only apps you need to worry about are those that are pirated copies or apps or plug-ins that are typically suggested to watch videos on porn sites. If you're not pirating software or visiting less-than-reputable sites, you're pretty safe. Read the link I posted for lists of recommended software, which are safe to use.

    Enjoy your Mac!
     
  5. raquel2010 thread starter macrumors newbie

    Joined:
    Oct 20, 2010
    #5
    Thanks again! I'll do the reading! I am definitely only going to reputable sites!! So I guess I don't have to worry! I am using the Safari browser. Is this the best option?

    Thanks
     
  6. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #6
    Safari is fine. So is Firefox and many others. I was just curious which browser you were using.
     
  7. raquel2010 thread starter macrumors newbie

    Joined:
    Oct 20, 2010
    #7
    Thanks Again :)

    Thanks again :) I am truly relieved now!! hehe
     
  8. munkery macrumors 68020

    munkery

    Joined:
    Dec 18, 2006
    #8
    Pair your remote or disable IR receiver (if you do not have a remote) as it may be another person's remote that is launching FrontRow. This can be done in System Preferences -> Security -> General.

    Using an unsecured network is risky. Specifically, other users can capture all traffic that is not encrypted (SSL). They cannot see what you are doing that only occurs within your system but they have access to all traffic that travels through the network (between your computer and the router) that is not encrypted.

    This means that all of your browsing activity can be observed and your emails can be read if your email provider does not use full session encryption. Gmail uses full session encryption but I do not think that hotmail does yet. Bank websites usually have full session encryption.

    Software, such as Ettercap, allows them to tag along with you from site to site by showing the web pages you visit in their web browser. A packet sniffer will capture your IM chats and emails in plain text if those services are not encrypted.

    Nothing has to be installed on your system for a MITM attack to work. It is all done on the attackers system. Your system gets tricked into thinking that the attackers computer is the router and then after the attacker's computer logs the traffic it sends the traffic to the router.

    There are even methods to trick other users into thinking that they are using encryption when they are not. All of this can be done without your authorization and without you even knowing about it unless you know specifically how to detect such activities.

    All of these attacks are very easy to do. They all can be done using GUI based software. No operating systems have built in defences to these kinds of ARP poisoning attacks.

    I would never use an unsecured network because you have no idea who else is connected to it. I would connect to a secured network that I do not administrate if I know the network administrator and felt they made good decisions about who they allow connect to the network.

    If I do connect to large public networks, such as a coffee shop or university, I run a program called Mocha because it will give me an alert in the lower left corner of my display when someone is attempting to poison the ARP table to perform MITM attacks.

    They would need your admin password to install a virus. Perian is safe; you do not need to worry about installing it. It is a codec pack that lets you use a lot more media formats.
     
  9. Kahnyl macrumors 68000

    Joined:
    Feb 2, 2009
    #9
    Some of the responses here are quite extreme.

    Also, the symbols under email addresses are most likely a system prompt of some sort. I can't think of what they could be specifically. Might be address book related.
     
  10. yamabushi macrumors 65816

    yamabushi

    Joined:
    Oct 6, 2003
    #10
    The email problem could be due to a problem with text encoding settings.
     
  11. raquel2010 thread starter macrumors newbie

    Joined:
    Oct 20, 2010
    #11
    Do you know how to solve this problem? I noticed that on some sites I also see some wierd characters instead of letters (especially if I got o a site that I have an email subscription)
     
  12. angelwatt Moderator emeritus

    angelwatt

    Joined:
    Aug 16, 2005
    Location:
    USA
    #12
    Sometimes it's caused by corrupt fonts on the system or poorly developed web sites. See the bottom of this guide for validating fonts. Here's another more general guide on dealing with font issues.
     
  13. raquel2010 thread starter macrumors newbie

    Joined:
    Oct 20, 2010
    #13
    Thank you Everyone!

    Thanks everyone for being so helpful!!
     

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