Home Malware Programs Tracking Cookies DoubleClick


Posted: March 26, 2005

Threat Metric

Threat Level: 1/10
Infected PCs: 67
First Seen: July 24, 2009
OS(es) Affected: Windows

DoubleClick is a subsidiary company of Google that focuses on tracking information that's related to viewers of online advertisements. Contact with DoubleClick is typically-caused by the presence of DoubleClick-based tracking cookies that are used by a wide variety of websites. Although DoubleClick tracking cookies only keep track of information that would be difficult to use for malicious purposes, many PC security brands have, nonetheless, categorized DoubleClick as a low-level threat due to limited opt-out options and other privacy issues. DoubleClick cookies have also been exploited by unrelated hackers for more serious attacks than DoubleClick's default behavior.

DoubleClick – a Double Tracking Feature That You May Not Know is There

Although DoubleClick is considered a benign utility by advertisers, those who are exposed to DoubleClick tracking cookies without realizing it may have reason to believe otherwise. DoubleClick tracking cookies are often included in a variety of advertisement-related content and, like many cookies, may be automatically-downloaded without your consent. After being downloaded, DoubleClick will monitor your activities in the following ways:

  • DoubleClick will monitor which advertisements you view and which advertisements you interact with during your visits to various websites.
  • DoubleClick may also track your IP address (a series of numbers that can be used to identify your PC) when you visit particular websites.

Although DoubleClick is low-key enough in resource usage that DoubleClick will not cause performance issues for most computers, the basic invasion of privacy that DoubleClick represents causes security researchers to suggest deletion of DoubleClick cookies if you're worried about these cookies seeing things that you'd rather they didn't see. In addition, you should also be aware that opt-out options for most types of DoubleClick cookies will often exclude the ability to opt-out of the IP-tracking feature even if you are allowed to opt out of other forms of DoubleClick's monitoring features.

The Incidental Threat to Your Safety – from Google

DoubleClick cookies may also be exploited to cause other attacks against your PC, although these exploits are always caused by hackers who take advantage of DoubleClick without Google's knowledge. Such exploits are often fixed ASAP, but their existence in the first place makes malware analysts recommend that you disable cookies for sites that you distrust. DoubleClick-based exploits have been used to install PC threats, such as Trojans, without acquiring consent beforehand.

Besides disabling cookies (a standard security option that most types of browser provide), keeping anti-malware products installed will allow you to detect and remove DoubleClick cookies at will. However, you should be aware that if your security settings don't block further cookie-based intrusions, visiting a site where you acquired a DoubleClick cookie may only cause you to re-download DoubleClick. Since this is often the work of rotating advertisements by third-parties, blocking advertisements altogether is another and popular method to protect your computer from DoubleClick tracking cookies, although it's not a substitute for appropriate PC security software.

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to DoubleClick may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.

Download SpyHunter's Malware Scanner

Note: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria .

Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.

Related Posts


  • Clark Smith says:


    How do I block cookies in Vista? I have Trend Anti Virus and it detects the same cookies every day. How do I prevent this? Thanks

  • Samuel Carr says:

    thank you for your information and help, I've been having trouble with doubleclick spyware browser entries on spybot S&D

  • SHIRLEY says:

    I did not ask for this doubleclick,.net you put on my computer and request you take it off.
    It is inteferring with everything I do.

  • Hein says:

    Hi having problems with web pages not opening due to DoubleClick spyware.

  • Audrey G says:

    Can you please send me some instructions on how to get this \"DOUBLECLICK COOKIE\" off my computer? Thank You..........

  • Jos Herck says:

    I 'am gone try it out

  • ft1997 says:


  • Dewboy says:

    To see cookies stored on your computer [this works only for Mozella FireFox]
    Right click on an open space on most any web page you are on.
    Look for “View Page Info” near the bottom, and click on it.
    {If you don’t see it at first, try a different location on the page or try a different web page.}
    A small window will open, look for “Security” at the top, click on that.
    Look for “View Cookies” in the middle right of the box, and click on that.
    A new box will open [you can now close the first box]
    There is a blue x at the right end of an address bar at the top [not the Window “close” X] click on the x.
    You will now see ALL the cookies stored on your computer.
    You can either selectively remove individual cookies, or remove all the cookies (recommended)
    HINT NOTE: Keep this box always open on the side and watch the continuous stream of cookies flowing in as you surf.
    You can periodically or continuously click the “Remove All Cookies” to keep the little buggers out.
    Small drawback: If you are signed into a site such as an email account, avoid removing their specific cookie as doing so will necessitate re-signing back in each time you remove that sites cookie(s). [very annoying]