ValidBrowser Removal Guide (Mac)

A strange browser add-on called FunctionServer aims to infect popular browsers like Google Chrome and Safari. Let us warn you up front that while this browser tool purports to improve consumers’ internet search and browsing experiences, it has no practical application. Cyber scammers created the FunctionServer app to take advantage of the vulnerable browser software and utilize it improperly to offer various types of ads. Therefore, if FunctionServer is installed on the browser, Mac users will undoubtedly see intrusive ads while browsing the internet. These advertisements might be bothersome pop-ups or redirections.

FunctionServer distribution methods

The distinct Mac infiltration techniques used by FunctionServer are numerous. The danger is typically acquired by a Mac user through malware bundles like freeware or shareware. These threat carriers are frequently available on a variety of websites and dubious file repositories. Evidently, Mac users are unaware that the program they download includes FunctionServer. The FunctionServer software is covertly inserted once the setup is complete, and no signs of intrusion are visible.

Manufacturers of FunctionServer adware use a variety of deployment techniques, including software bundling. The suspect program also distributes malicious advertising as support for the main spreading strategies. In this instance, it’s posing as an important software update for Media Player, Google Chrome, or Adobe Flash. Online users might easily be persuaded by the aforementioned deceptive advertisements by claims that a software update is required to fix issues and conflicts discovered on Mac computers. The screenshot shows an illustration of this fake software update. See the picture below.

Screenshot of ValidBrowser App

The risks of installing the FunctionServer app

FunctionServer will cause a number of problems with the internet program as soon as it has loaded completely into the browser application. Ads that are aggressive in nature may appear as pop-ups and redirects. It could occasionally happen that you browse undesirable websites like News-sehovi.cc, Topsmooth24.com, and so on.

Because the mentioned sites contain malicious software that could rapidly download an unwanted program on the visitor’s computer, visiting them could serve as the starting point for further malware infestation. As a result, we urge you to remove the FunctionServer program right away. Here is how to get rid of this menace, along with some efficient solutions for malware and virus eradication.

Procedures to Remove ValidBrowser from Mac

This area contains comprehensive procedures to help you remove adware and potentially unwanted program from the computer.

Guide on this page are written in a manner that can be easily understand and execute by Mac users.

Quick Fix - Scan the Mac Computer with Combo Cleaner

Combo Cleaner is a trusted Mac utility application with complete antivirus and optimization features. It is useful in dealing with adware, malware, and PUP's. Moreover, it can get rid of adware like ValidBrowser. You may need to purchase full version if you require to maximize its premium features.

1. Download the tool from the following page:

2. Double-click the downloaded file and proceed with the installation.

3. In the opened window, drag and drop the Combo Cleaner icon onto your Applications folder icon.

Install Combo Cleaner

4. Open your Launchpad and click on the Combo Cleaner icon.

5. Wait until antivirus downloads its latest virus definition updates and click on "Start Combo Scan" to start removing ValidBrowser.

Combo Cleaner Scanner

6. Free features of Combo Cleaner include Disk Cleaner, Big Files finder, Duplicate files finder, and Uninstaller. To use antivirus and privacy scanner, users have to upgrade to a premium version.

Proceed with the rest of the removal steps if you are comfortable in manually removing malicious objects associated with the threat.

Step 1 : Delete ValidBrowser from Mac Applications

1. Go to Finder.

2. On the menu, click Go and then, select Applications from the list to open Applications Folder.

3. Find ValidBrowser or any unwanted program or suspicious item. It could be in disguise as a different file.

Delete Unwanted App

4. Drag ValidBrowser to Trash Bin to delete the application from Mac.

5. Right-click on Trash icon and click on Empty Trash.

Step 2 : Remove Browser Extensions that belongs to ValidBrowser

1. Locate the add-on or extension that is relevant to the adware. To do this, please follow the following depending on affected browser.

Safari - Choose Preferences from the Safari menu, then click the Extensions icon. This will open a window showing all installed extensions.

Chrome - Select Preferences from the Chrome menu, and then click the Extensions link found on the left pane.

Firefox - Choose Add-ons from the Menu. Look at both the Extensions and Plug-ins lists when it opens a new window.

2. Once you have located ValidBrowser, click on Remove or Uninstall, to get rid of it.

3. Close the browser and proceed to the next steps.

Step 3 : Delete Malicious Files that have installed ValidBrowser

1. Select and copy the string below to your Clipboard by pressing Command + C on your keyboard.

~/Library/LaunchAgents

2. Go to your Finder. From the menu bar please select Go > Go to Folder...

3. Press Command + V on your keyboard to paste the copied string. Press Return to go to the said folder.

Command + V

4. You will now see a folder named LaunchAgents. Take note of the following files inside the folder:

  • com.ValidBrowser
  • unknown.download.plist
  • unknown.ltvbit.plist
  • unknown.update.plist

The term unknown is just a representation of the actual malware name. Attackers may masks the actual name with following:

- Valid Browser App

If you cannot find the specified file, please look for any unfamiliar or suspicious entries. It may be the one causing ValidBrowser to be present on your Mac. Arranging all items to see the most latest ones may also help you identify recently installed unfamiliar files. Please press Option + Command + 4 on your keyboard to arrange the application list in chronological order.

Option+Command+4

Important: Take note of all the suspicious files as you may also delete the same item on another folder as we go on.

5. Drag all suspicious files that you may find to Trash.

6. Please restart the computer.

7. Open another folder using the same method as above. Copy and Paste the following string to easily locate the folder.

~/Library/Application Support

8. Look for any suspicious items that are similar to the ones in Step 4. Drag them to the Trash.

9. Repeat the process on the following non-hidden folders (without ~):

/Library/LaunchAgents
/Library/LaunchDaemons
/Library/Application Support

10. Lastly, go to your Finder and open the Applications Folder. Look for subfolders with the following names and drag them to Trash.

- Valid Browser App

Optional : For locked files that cannot be removed, do the following:

1. Go to Launchpad, Utilities folder, open Activity Monitor.

2. Select the process you want to quit.

Force Quit Apps

3. Click on Force Quit button.

4. You may now delete or remove locked files that belongs to ValidBrowser adware.

Step 4 : Double-check with MBAM Tool for Mac

1. Download Malwarebytes Anti-malware for Mac from this link:

2. Run Malwarebytes Anti-malware for Mac. It will check for updates and download if most recent version is available. This is necessary in finding recent malware threats including ValidBrowser.

3. If it prompts to close all running web browser, please do so. Thus, we advise you to PRINT this guide for your reference before going offline.

4. Once it opens the user interface, please click on Scan button to start scanning your Mac computer.

MBAM for Mac

5. After the scan, Malwarebytes Anti-malware for Mac will display a list of identified threats, ValidBrowser is surely part of it. Be sure to select all items in the list. Then, click Remove button to clean the computer.

Step 5 : Remove ValidBrowser from Homepage and Search

Safari

- Open your Safari browser.
- Go to Safari Menu located on upper left hand corner, and then select Preferences.
- Under General tab, navigate to Default Search Engine section and select Google or any valid search engine.
- Next, be sure that "New Windows Open With" field is set to Homepage.
- Lastly, remove ValidBrowser from the Homepage field. Replace it with your preferred URL to be set as your default homepage.

Google Chrome

- Open Chrome browser.
- Type the following on the address bar and press Enter on keyboard : chrome://settings/
- Look for 'On Startup' area.
- Select 'Open a specific page or set of pages'.
- Click on More Actions and select Edit.
- Enter the desired web address as your home page, replacing ValidBrowser. Click Save.
- To set default search engine, go to Search Engine area.
- Click on 'Manage search engines...' button.
- Go to questionable Search Engine. Click on More Actions and Click 'Remove from list'.
- Go back to Search Engine area and choose valid entry from Search engine used in the address bar.

Mozilla Firefox

- Run Mozilla Firefox browser.
- Type the following on the address bar and hit Enter on keyboard : about:preferences
- On Startup area, select 'Show your home page' under 'When Firefox starts' field.
- Under Home Page field, type the desired URL to replace ValidBrowser settings.
- To configure default search engine, select Search on left sidebar to display settings.
- Under Default Search Engine list, please select one.
- On the same page, you have an option to Remove unwanted search engine.

Optional : If unable to change browser settings, execute these steps:

Some user complains that there is no way to change browser settings because it is grayed out by ValidBrowser. In such situation, it is important to check if there is unwanted profile. Please do the following:

1. Quit any running applications and launch System Preferences from your Dock.

2. Under System Preferences, click Profiles.

3. Select ValidBrowser or any relevant profile from the left pane. See image below.

Remove Profile

4. At the bottom of this window, click minus [-] button to delete the account. Please refer to image above.

5. Close the Profiles window and open the affected browser to change all settings associated with ValidBrowser.

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