Mountainbender Virus

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Mountainbender is a Chrome and Firefox add-on that falls under the browser-hijacking category because it changes the homepage and the new-tab page without permission. Mountainbender uses the new homepage/new-tab page addresses to promote certain sites and to spam the users’ screens with ads.

Mountainbender 1024x505

If you are familiar with this potentially unwanted app because it has already gotten installed in your computer, then you should definitely read the current post as it will help you better understand the specifics of the unwanted software and the potential dangers related to it.

First and foremost, we must tell you what the goal of Mountainbender is. This undesirable app is aimed at feeding ads to your browser after replacing the main search engine, the homepage, and the new-tab page with ones of its own. It uses the newly-introduced browser elements to redirect the user to different sites that it tries to popularize by drawing more traffic to them. For example, the new homepage/new-tab page addresses automatically generate visits to their respective sites each time you start the browser or open a new tab. In addition, the search engine imposed on your browser by the hijacker is probably a modified version of a popular search engine such as Google, Bing, or Yahoo. This modified version has probably been set to favor a bigger number of advertised results instead of showing the users the most relevant entries. This further makes browsing less optimized and more time-consuming as you’d be spending more time finding the information you are interested in among the ads and sites promoted by the hijacker.



Type Browser Hijacker
Danger LevelMedium (nowhere near threats like Ransomware, but still a security risk)
SymptomsUsually accompanied by a vast number of online ads such as popups, banners, box messages, in-text links, and others.
Distribution MethodProgram bundles obtained from dubious download sources such as file-sharing platforms, torrent sites, and similar.
Detection Tool

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Please follow all the steps below in order to remove Mountainbender!

How to remove Mountainbender

  1. First, click the Start Menu on your Windows PC.
  2. Type Programs and Settings in the Start Menu, click the first item, and find Mountainbender in the programs list that would show up.
  3. Select Mountainbender from the list and click on Uninstall.
  4. Follow the steps in the removal wizard.

What we suggest you do first is, check the list of programs that are presently installed on the infected device and uninstall any rogue software that you find there:

  • From the Start Menu, navigate to Control Panel ->>> Programs and Features ->>> Uninstall a Program.
  • Next, carefully search for unfamiliar programs or programs that have been installed recently and could be related to Mountainbender.
  • If you find any of the programs suspicious then uninstall them if they turn out to be linked to Mountainbender.
  • If a notification appears on your screen when you try to uninstall a specific questionable program prompting you to just alter it or repair it, make sure you choose NO and complete the steps from the removal wizard.

Remove Mountainbender from Chrome

  1. Click on the three dots in the right upper corner
  2. Go to more tools
  3. Now select extensions
  4. Remove the Mountainbender extension
  • Once you open Chrome, click on the three-dots icon to open the browser’s menu, go to More Tools/ More Options, and then to Extensions.
  • Again, find the items on that page that could be linked to Mountainbender and/or that might be causing problems in the browser and delete them.
  • Afterwards, go to this folder: Computer > C: > Users > *Your User Account* > App Data > Local > Google > Chrome > User Data. In there, you will find a folder named Default – you should change its name to Backup Default and restart the PC.
  • Note that the App Data folder is normally hidden so you’d have to first make the hidden files and folders on your PC visible before you can access it.

How to get rid of Mountainbender on FF/Edge/etc.

  1. Open the browser and select the menu icon.
  2. From the menu, click on the Add-ons button.
  3. Look for the Mountainbender extension
  4. Get rid of Mountainbender by removing it from extensions

If using Firefox:

  • Open Firefox
  • Select the three parallel lines menu and go to Add-ons.
  • Find the unwanted add-on and delete it from the browser – if there is more than one unwanted extension, remove all of them.
  • Go to the browser menu again, select Options, and then click on Home from the sidebar to the left.
  • Check the current addresses for the browser’s homepage and new-tab page and change them if they are currently set to address(es) you don’t know or trust.

If using MS Edge/IE:

  • Start Edge
  • Select the browser menu and go to Extensions.
  • Find and uninstall any Edge extensions that look undesirable and unwanted.
  • Select Settings from the browser menu and click on Appearance.
  • Check the new-tab page address of the browser and if it has been modified by “Mountainbender” or another unwanted app, change it to an address that you’d want to be the browser’s new-tab page.

How to Delete Mountainbender

  1. Open task manager
  2. Look for the Mountainbender process
  3. Select it and click on End task
  4. Open the file location to delete Mountainbender
  • Access the Task Manager by pressing together the Ctrl + Alt + Del keys and then selecting Task Manager.
  • Open Processes and there try to find a process with the name of the unwanted software. If you find it, select it with the right button of the mouse and click on the Open File Location option.
  • If you don’t see a “Mountainbender” process in the Task Manager, look for another suspicious process with an unusual name. It is likely that the unwanted process would be using lots of RAM and CPU so pay attention to the number of resources each process is using.
  • Tip: If you think you have singled out the unwanted process but are not sure, it’s always a good idea to search for information about it on the Internet – this should give you a general idea if the process is a legitimate one from a regular program or from your OS or if it is indeed likely linked to the adware.
  • If you find another suspicious process, open its File Location too.
  • Once in the File Location folder for the suspicious process, start testing all of the files that are stored there by dragging them to our free online scanner available below.
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    • If the scanner finds malware in any of the files, return to the Processes tab in the Task Manager, select the suspected process, and then select the End Process option to quit it.
    • Go back to the folder where the files of that process are located and delete all of the files that you are allowed to delete. If all files get deleted normally, exit the folder and delete that folder too. If one or more of the files showed an error message when you tried to delete them, leave them for now and return to try to delete them again once you’ve completed the rest of the guide.

    How to Uninstall Mountainbender

    1. Click on the home button
    2. Search for Startup Apps
    3. Look for Mountainbender in there
    4. Uninstall Mountainbender from Startup Apps by turning it off
    • Now you need to carefully search for and uninstall any Mountainbender. racing-related entries from the Registry. The easiest way to do this is to open the Registry Editor app (type Regedit in the windows search field and press Enter) and then open a Find dialog (CTRL+F key combination) where you have to type the name of the threat. 
    • Perform a search by clicking on the Find Next button and delete any detected results. Do this as many times as needed until no more results are found. 
    • After that, to ensure that there are no remaining entries lined to Mountainbender in the Registry, go manually to the following directories and delete them:
    • HKEY_CURRENT_USER/Software/Random Directory. 
    • HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Run/Random
    • HKEY_CURRENT_USER/Software/Microsoft/Internet Explorer/Main/Random
    Is Mountainbender dangerous?

    Most users who get Mountainbender or other similar apps like Captcha Fine installed in their browser tend to get scared by the presence of the undesirable software, thinking it might be some serious malware infection such as a Trojan horse virus or a file-encrypting Ransomware virus that will get their data locked and then ask them to pay a ransom for its liberation. Mountainbender is neither of those things nor is it anything else that can damage your computer or corrupt your important files. However, it is still not a kind of software you should trust and keep in your computer and there are several reasons for that.
    The first and more obvious reason is the irritation triggered by the ads, the redirects, and the unpleasant browser changes. For most users, this is more than enough to decide to uninstall the hijacker.
    However, there is a second, more important reason, why removing Mountainbender from your computer is something you must do as soon as possible. Apps like it don’t typically control the flow of ads and redirects based on how reliable the advertising source is. This means that you can get linked to reliable and legitimate sites that sell something useful but you could also land on pages that try to trick you and get you to download low-quality software or even Ransomware, Trojans, or other hazardous virus programs. Because of this, even if you don’t mind the ads all that much, it is still essential that you have the hijacker generating them removed from your computer


    About the author


    Brandon Skies

    Brandon is a researcher and content creator in the fields of cyber-security and virtual privacy. Years of experience enable him to provide readers with important information and adequate solutions for the latest software and malware problems.


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