How to remove ChangeParameter (Mac)

ChangeParameter is deemed as potentially unwanted application (PUA) due to its employing of intrusive techniques in order to get inside Mac computers. It is advertised as useful browser extension that supposedly makes web user’s online browsing and searching more enjoyable and efficient. But in reality, the objective of ChangeParameter app is to promote an unknown search engine, which it will placed as the new default setup after it gains entry on Mac system.

How ChangeParameter enters Mac computer?

In majority of infection cases, there is a possibility that Mac user have installed this PUA without a notice while it is embedded to freeware or shareware that was meant to use as spreader of ChangeParameter app or similar malicious browser extensions as DominantMapper, DigitalEnviroment, and AnalyzerSource. Dubious apps like these are commonly integrated to attractive applications like free utilities, games, media player, file converter, and so on. Many of these free software comes with an optional offers. Hence, we cannot guarantee that Mac user have any options during setup process as most of the included surplus apps are hidden and set to run a simultaneous install. Probably, the ‘option’ window is only available on legitimate and clean freeware apps, but not with the carrier of ChangeParameter or similar PUA.

There are also cases that Mac user accidentally loads ChangeParameter upon accessing a software update offered by some website pop-ups. Unknown to Mac user, these are deceitful ads purporting as system alert and hoping to lure them to execute a fake software update that will instead load ChangeParameter app onto the computer.

Image of ChangeParameter

Risks of having ChangeParameter

Both Adware and potentially unwanted application (PUA) characterize ChangeParameter app. This only denotes that this browser extension commonly enters the computer uninvited and after gaining access, it performs different malicious actions to generate profit. Normally, ChangeParameter accomplishes this by displaying unusual ads and redirects on internet browser program. Mac users who will access these ads have a potential of infecting the computer with separate malware because the pop-ups and redirects are meant to divert the browser pages to malicious websites.

Procedures to Remove ChangeParameter 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 System 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 ChangeParameter. 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 ChangeParameter.

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 ChangeParameter 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 ChangeParameter or any unwanted program.

Delete Unwanted App

4. Drag ChangeParameter 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 ChangeParameter

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 ChangeParameter, 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 ChangeParameter

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.ChangeParameter
  • 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:

- DominantMapper, DigitalEnviroment

If you cannot find the specified file, please look for any unfamiliar or suspicious entries. It may be the one causing ChangeParameter 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.

- DominantMapper, DigitalEnviroment

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 ChangeParameter 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 ChangeParameter.

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, ChangeParameter 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 ChangeParameter 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 ChangeParameter 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 ChangeParameter. 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 ChangeParameter 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 ChangeParameter. 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 ChangeParameter 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 ChangeParameter.

How to prevent ChangeParameter attack?

One effective way to avoid any adware or malware infection is to equip the device with effective and reliable security software. There are many anti-virus and anti-malware applications to choose from. All of them provide real-time scanning that block malicious files from entering the computer. In addition, having a security application can deter any malicious online traffic and thus, user can avoid any sites that hosts ChangeParameter app or similar threats.

Post Last Modified On October 7, 2020

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