14 Replies Latest reply: Jul 4, 2010 11:31 AM by Klaus1
caaaaaaasdasd Level 1 Level 1 (0 points)
Could some REALLLLLY useful person possibly tell me how to get adware/malware off a mac.
my girlfriends is completely screwed and I cant find anything to help it.

macbook, Mac OS X (10.4.11)
  • BDAqua Level 10 Level 10 (121,200 points)
    Hi caaaaaaasdasd, and a warm welcome to the forums!

    Can you tell us a bit more of what is going on exactly?

    One thing you can do is Get MacScan...


    See if you might have this malware redirecting DNS queries...


    How to fix...


    Nasty Nasty ! 1023.dmg...


  • caaaaaaasdasd Level 1 Level 1 (0 points)
    hey, thanks for the help but it doesnt seem to be that. Whenever I try to load some sites i just get a "connecting to ad.doubleclick.com" and the website never loads. happens with small websites and large ones such as facebook, bbc, youtube and ANYTHING to do with google.
  • BDAqua Level 10 Level 10 (121,200 points)
    Try putting these numbers in Network>TCP/IP>DNS Servers for the Interface you're using...

    Then Apply. These are safer/faster than most ISP's DNS numbers, and have been patched against DNS poisoning.

    Or, open Terminal, & Flush DNS in Mac OSX using the Terminal.

    Paste this command & hit Return/Enter...

    lookupd -flushcache
  • caaaaaaasdasd Level 1 Level 1 (0 points)
    Ive tried changing DNS servers already, didnt seem to effect it unless I have to restart.
    when I open Terminal I paste that but it automatically goes down a line without letting me hit enter.
    also ive been getting "transferring data from ##.###.###.###..." now on and it seems I can load less and less websites then before. Some that I could load, I now cant.
  • Klaus1 Level 8 Level 8 (47,335 points)
    Do not be tricked by 'scareware' that attempts computer users to download fake anti-virus software that may itself be malware.

    Fake anti-virus software that infect PCs with malicious code are a growing threat, according to a study by Google. Its analysis of 240m web pages over 13 months showed that fake anti-virus programs accounted for 15% of all malicious software.

    Scammers trick people into downloading programs by convincing them that their PC is infected with a virus.
    Once installed, the software may steal data or force people to make a payment to register the fake product.
    Beware of PDF files from unknown sources. A security firm announced that by its counting, malicious Reader documents made up 80% of all exploits at the end of 2009.:


    No viruses that can attack OS X have so far been detected 'in the wild', i.e. in anything other than laboratory conditions.

    It is possible, however, to pass on a Windows virus to another Windows user, for example through an email attachment. To prevent this all you need is the free anti-virus utility ClamXav, which you can download for Tiger and Leopard from (on no account install Norton Anti-Virus on a Mac running OS X):


    The new version for Snow Leopard is available here:


    (Note: ClamAV adds a new user group to your Mac. That makes it a little more difficult to remove than some apps. You’ll find an uninstaller link in ClamXav’s FAQ page online.)

    However, the appearance of Trojans and other malware that can possibly infect a Mac seems to be growing, but is a completely different issue to viruses.

    If you allow a Trojan to be installed, the user's DNS records can be modified, redirecting incoming internet traffic through the attacker's servers, where it can be hijacked and injected with malicious websites and pornographic advertisements. The trojan also installs a watchdog process that ensures the victim's (that's you!) DNS records stay modified on a minute-by-minute basis.

    You can read more about how, for example, the OSX/DNSChanger Trojan works here:


    SecureMac has introduced a free Trojan Detection Tool for Mac OS X. It's available here:


    The DNSChanger Removal Tool detects and removes spyware targeting Mac OS X and allows users to check to see if the trojan has been installed on their computer; if it has, the software helps to identify and remove the offending file. After a system reboot, the users' DNS records will be repaired.

    (Note that a 30 day trial version of MacScan can be downloaded free of charge from:


    and this can perform a complete scan of your entire hard disk. After 30 days free trial the cost is $29.99. The full version permits you to scan selected files and folders only, as well as the entire hard disk. It will detect (and delete if you ask it to) all 'tracker cookies' that switch you to web sites you did not want to go to.)

    A white paper has recently been published on the subject of Trojans by SubRosaSoft, available here:


    Also, beware of MacSweeper:

    MacSweeper is malware that misleads users by exaggerating reports about spyware, adware or viruses on their computer. It is the first known "rogue" application for the Mac OS X operating system. The software was discovered by F-Secure, a Finland based computer security software company on January 17, 2008


    On June 23, 2008 this news reached Mac users:


    More on Trojans on the Mac here:


    This was published on July 25, 2008:

    Attack code that exploits flaws in the net's addressing system are starting to circulate online, say security experts.

    The code could be a boon to phishing gangs who redirect web users to fake bank sites and steal login details.

    In light of the news net firms are being urged to apply a fix for the loop-hole before attacks by hi-tech criminals become widespread.

    Net security groups say there is anecdotal evidence that small scale attacks are already happening.

    Further details here: http://news.bbc.co.uk/2/hi/technology/7525206.stm

    A further development was the Koobface malware that can be picked up from Facebook (already a notorious site for malware, like many other 'social networking' sites like Twitter etc), as reported here on December 9, 2008:


    You can keep up to date, particularly about malware present in some downloadable pirated software, at the Securemac site:


    There may be other ways of guarding against Trojans, viruses and general malware affecting the Mac, and alternatives will probably appear in the future. In the meantime the advice is: be careful where you go on the web and what you download!

    If you think you may have acquired a Trojan, and you know its name, you can also locate it via the Terminal:

    http://theappleblog.com/2009/04/24/mac-botnet-how-to-ensure-you-are-not-part-of- the-problem/

    As to the recent 'Conficker furore' affecting Intel-powered computers, MacWorld recently had this to say:


    Although any content that you download has the possibility of containing malicious software, practising a bit of care will generally keep you free from the consequences of anything like the DNSChanger trojan.
    1. Avoid going to suspect and untrusted Web sites, especially p'orn'ography sites.

    2. Check out what you are downloading. Mac OS X asks you for you administrator password to install applications for a reason! Only download media and applications from well-known and trusted Web sites. If you think you may have downloaded suspicious files, read the installer packages and make sure they are legit. If you cannot determine if the program you downloaded is infected, do a quick Internet search and see if any other users reported issues after installing a particular program. A recent example is of malware distributed through innocent looking free screensavers: http://www.zdnet.com/blog/security/malware-watch-free-mac-os-x-screensavers-bund led-with-spyware/6560?tag=nl.e589

    3. Use an antivirus program like ClamXav. If you are in the habit of downloading a lot of media and other files, it may be well worth your while to run those files through an AV application.

    4. Use Mac OS X's built-in Firewalls and other security features.

    5. Stop using LimeWire. LimeWire (and other peer-to-peer sharing applications and download torrents) are hotbeds of potential software issues waiting to happen to your Mac. Everything from changing permissions to downloading trojans and other malicious software can be acquired from using these applications. Similar risks apply to using Facebook, Twitter, MySpace, YouTube and similar sites which are prone to malicious hacking: http://news.bbc.co.uk/1/hi/technology/8420233.stm

    6. Resist the temptation to download pirated software. After the release of iWork '09 earlier this year, a Trojan was discovered circulating in pirated copies of Apple's productivity suite of applications (as well as pirated copies of Adobe's Photoshop CS4). Security professionals now believe that the botnet (from iServices) has become active. Although the potential damage range is projected to be minimal, an estimated 20,000 copies of the Trojan have been downloaded. SecureMac offer a simple and free tool for the removal of the iBotNet Trojan available here:


    Last but not least, there is the potential for having your entire email contact list stolen for use for spamming:


    NOTE: Snow Leopard, OS 10.6.x, offers additional security to that of previous versions of OS X, but not to the extent that you should ignore the foregoing:


    Apple's 10.6.4 operating system upgrade silently updated the malware protection built into Mac OS X to protect against a backdoor Trojan horse that can allow hackers to gain remote control over your treasured iMac or MacBook.

  • WZZZ Level 6 Level 6 (12,775 points)
    also ive been getting "transferring data from ##.###.###.###..."

    When does that happen?

    Ive tried changing DNS servers already

    Which servers? Did you use the ones BDAqua gave you?

    After you enter those DNS numbers for OpenDNS, you should empty the cookies and cache in your browser.

    Check to see you are using OpenDNS


    when I open Terminal I paste that but it automatically goes down a line without letting me hit enter.

    Might be your Terminal Preference file is messed up. In your user's Library (the one with your account name/the little house Icon) go to Preferences and trash this file: com.apple.Terminal.Plist. A new clean one will be created the next time you open Terminal.

    I think you should also open Disk Utility in Utilities, select the Volume you are using and Verify. Report any errors.

    Message was edited by: WZZZ
  • caaaaaaasdasd Level 1 Level 1 (0 points)
    Hello! well, I woke up this morning with avast virus scan done, and I deleted all the warnings it would let me, for 118 of them I cant delete, it says the it is unprocessed. Anyways, it seems to be working now as I can visit all the websites I could before without any trouble.
    And yes ive been using the ones BDAqua gave to me for a while.
    anyways thanks for the help for now, I might be back....
  • caaaaaaasdasd Level 1 Level 1 (0 points)
    anyway to +rep you two?
  • BDAqua Level 10 Level 10 (121,200 points)
    What does "+rep you two" mean?
  • Klaus1 Level 8 Level 8 (47,335 points)
    Glad you asked, I was wondering about that!
  • WZZZ Level 6 Level 6 (12,775 points)
    We may never know; this thread was marked Solved and we never even found out in any detail what the actual problem was.

    Avast virus scan?

    The world's most popular antivirus software
  • Klaus1 Level 8 Level 8 (47,335 points)
    Never heard of it!

  • WZZZ Level 6 Level 6 (12,775 points)
    This is the best thing since the discovery of ice cream on the polar caps of Mars.
  • Klaus1 Level 8 Level 8 (47,335 points)

    And only $40 compared to the free ClamXav!