Remove CustomSuccess Virus (Mac)

By | Posted on February 12, 2020 |

CustomSuccess is a malicious browser extension that was found to be targeting Mac OS users. It specifically attacks browser programs like Safari, Google Chrome, and Mozilla Firefox. Makers of CustomSuccess deploy this malicious app in a very similar way as other Adware and potentially unwanted program (PUP). They are employing software bundling technique where CustomSuccess is hiding on several freeware and shareware that Mac users may obtain from a number of websites.

Cyber crooks behind CustomSuccess occasionally use advertising campaign to promote this app. But then again, the ads can trick users by offering a valuable tool or software update that contains CustomSuccess in the installer package. In deceitful adware spread tactics as this, the host file was designed to deliberately hide the full package content. In fact, aside from CustomSuccess.app file, there may be other adware and PUP in this bundle. Similar doubtful browser extensions like SystemNotes, UpgradeStart, or SystemSpot maybe included.

The successful installation of CustomSuccess app on browser program can cause unnecessary changes that could override default settings on homepage, new tab, and search tool. Computer users may also suffer from excessive display of advertisements that often pop-ups on the internet software and it could be banner, full-page ads, or miniature push notification that looks appealing. Nonetheless, web users should practice online safety by refraining from clicking on any of these advertisements as it could land the browser to URL with malicious content.

CustomSuccess App

CustomSuccess is not a usual browser extension. Even if it is endorsed as an app that enhances Mac user’s online browsing experience, its actions reveals that there is a risks during its existence. Aside from annoyances due to disproportionate exhibition of ads, recording of sensitive and personal data from the browser is part of CustomSuccess’ intention. Therefore, it is highly suggested to get rid of this adware as soon as possible. Complete guide to remove CustomSuccess is included in this article along with free, yet effective anti-virus and anti-malware tool.

Procedures to Remove CustomSuccess 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.

Step 1 : 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 CustomSuccess. You may need to purchase full version if you require to maximize its premium features.

1. Download the tool from the following page:

Click here to Download Combo Cleaner

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.

CCleaner

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

5. Wait until antivirus downloads it's latest virus definition updates and click on "Start Combo Scan" to start removing CustomSuccess.

Start Combo Scan

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 2 : Remove Browser Extensions that belongs to CustomSuccess

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 Plugins lists when it opens a new window.

2. Once you have located CustomSuccess, 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 CustomSuccess

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.CustomSuccess
  • 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:

- SafeFinder

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

- SafeFinder

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 Locked Files

3. Click on Force Quit button.

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

Step 4 : Double-check with MBAM Tool for Mac

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

Click here to download MBAM for Mac

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 CustomSuccess.

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.

Malwarebytes Anti-malware for Mac

5. After the scan, Malwarebytes Anti-malware for Mac will display a list of identified threats, CustomSuccess 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 CustomSuccess 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 CustomSuccess 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 CustomSuccess. 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 CustomSuccess 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 CustomSuccess. 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 CustomSuccess 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 CustomSuccess.

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