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How to remove MarketService adware from your operating system

Also Known As: Ads by MarketService
Type: Mac Virus
Damage level: Medium

How to remove MarketService adware from Mac computers

What is MarketService?

MarketService is an adware-type application with browser hijacker traits. Following successful installation, it delivers intrusive advertisement campaigns, makes modifications to browser settings and promotes fake search engines. MarketService promotes 6v5f3l.com on Safari browsers and search.locatorunit.com on Google Chrome browsers. Additionally, most adware-type apps and browser hijackers have data tracking capabilities, which are used to monitor users' browsing activity. Due to the dubious techniques used to proliferate MarketService, it is also classified as a Potentially Unwanted Application (PUA). One of the dubious methods used for this app is proliferation via fake Adobe Flash Player updates. Furthermore, bogus software updaters/installers spread PUAs, Trojans, ransomware and other malware as well.

MarketService adware

Adware delivers pop-ups, banners, coupons, surveys and other intrusive advertisements. These significantly diminish the browsing experience, as the ads limit browsing speed and website visibility (by overlaying web page content). When clicked, intrusive ads redirect to various dubious/malicious websites and some can even stealthily download/install software (e.g. PUAs). Browser hijackers can reassign the homepage, default search engine and new tab/window URLs to the addresses of fake search engines. Therefore, with this software installed, each new browser tab/window opened and search query typed into the URL bar redirects to the promoted address. MarketService promotes 6v5f3l.com (on Safari) and search.locatorunit.com (on Google Chrome) in this manner. Fake search engines are seldom capable of providing search results, and so they tend to redirect to Google, Yahoo, Bing and other legitimate sites. Browser hijackers can undo any changes users attempt to make to their browsers and/or restrict/deny access to the browser settings outright. Therefore, recovering a hijacked browser is impossible without removing the software affecting it. Most PUAs can track data. They can record browsing activity (URLs visited, pages viewed, search queries, etc.) and gather personal information extracted from it (IP addresses, geolocations and other details). The collected data is then shared with and/or sold to third parties (potentially, cyber criminals). In summary, the presence of unwanted software on devices can lead to system infections, financial loss and even identity theft. To protect device integrity and user safety, all suspect applications and browser extensions/plug-ins must be removed without delay.

Threat Summary:
Name Ads by MarketService
Threat Type Adware, Mac malware, Mac virus.
Detection Names Avast (MacOS:AdAgent-L [Adw]), Sophos AV (AdLoad (PUA)), ESET-NOD32 (Multiple Detections), Kaspersky (Not-a-virus:HEUR:AdWare.OSX.Adload.h), Full List (VirusTotal).
Additional Information This application belongs to the Adload malware family.
Symptoms Your Mac becomes slower than normal, you see unwanted pop-up ads, you are redirected to dubious websites.
Distribution methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers, torrent file downloads.
Damage Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites, loss of private information.
Malware Removal (Mac)

To eliminate possible malware infections, scan your Mac with legitimate antivirus software. Our security researchers recommend using Combo Cleaner.
▼ Download Combo Cleaner for Mac
To use full-featured product, you have to purchase a license for Combo Cleaner. Limited three days free trial available.

AnalyticParameterCommonGeneration and ProductiveRotator are some examples of other apps in the adware classification. They may seem legitimate and offer a wide variety of "useful" functionality, however, the advertised features are rarely operational. In fact, this information is true of most PUAs. The only purpose of this unwanted software is to generate revenue for the developers. Rather than delivering any real value, PUAs cause redirects, run intrusive advertisement campaigns, hijack browsers and collect private data.

How did MarketService install on my computer?

PUAs are often downloaded/installed together with other products. This deceptive marketing technique of pre-packing regular software with unwanted or malicious additions is called "bundling". By rushing through download/installation of software (e.g. ignoring terms, skipping steps and sections, using "Quick/Express" settings, etc.) many users risk unintentionally allowing bundled content into their devices. Intrusive advertisements proliferate PUAs as well. When clicked, the ads can execute scripts to download/install these applications without users' permission. Some PUAs have "official" download web pages from which they can be downloaded.

How to avoid installation of potentially unwanted applications

You are advised to research all software before download/installation. Use only official and verified download channels. Unofficial and free file-hosting websites, Peer-to-Peer sharing networks (BitTorrent, Gnutella, eMule), and other third party downloaders commonly offer harmful and bundled content, and are therefore untrusted and should be avoided. When downloading/installing, read the terms, study all possible options, use the "Custom/Advanced" settings and opt-out of additional apps, tools, features, and so on. Intrusive advertisements typically seem legitimate, however, they can redirect to dubious and malicious sites (e.g. gambling, pornography, adult-dating, and many others). If you encounter ads or redirects of this kind, inspect the system and remove all dubious applications and browser extensions/plug-ins immediately. If your computer is already infected with MarketService, we recommend running a scan with Combo Cleaner Antivirus for macOS to automatically eliminate this adware.

MarketService adware distributed via fake Flash Player updater/installer:

Delusive installer used to promote MarketService adware

Pop-up window displayed once MarketService adware's installation is complete:

Pop-up displayed once MarketService installation is complete

Appearance of MarketService adware promoting 6v5f3l.com (GIF):

MarketService adware promoting 6v5f3l.com (GIF)

Appearance of MarketService adware promoting search.locatorunit.com (GIF):

MarketService adware promoting search.locatorunit.com (GIF)

MarketService adware installed onto the Safari browser:

MarketService adware installed onto Safari

MarketService adware installation folder:

MarketService adware install folder

Instant automatic Mac malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of Mac malware. Download it by clicking the button below:
▼ DOWNLOAD Combo Cleaner for Mac By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo Cleaner. Limited three days free trial available.

Quick menu:

Video showing how to remove MarketService adware using Combo Cleaner:

MarketService adware removal:

Remove MarketService-related potentially unwanted applications from your "Applications" folder:

mac browser hijacker removal from applications folder

Click the Finder icon. In the Finder window, select "Applications". In the applications folder, look for "MPlayerX","NicePlayer", or other suspicious applications and drag them to the Trash. After removing the potentially unwanted application(s) that cause online ads, scan your Mac for any remaining unwanted components.

Remove ads by marketservice related files and folders:

Finder go to folder command

Click the Finder icon, from the menu bar. Choose Go, and click Go to Folder...

step1Check for adware-generated files in the /Library/LaunchAgents folder:

removing adware from launch agents folder step 1

In the Go to Folder... bar, type: /Library/LaunchAgents

removing adware from launch agents folder step 2
In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step2Check for adware generated files in the /Library/Application Support folder:

removing adware from application support folder step 1

In the Go to Folder... bar, type: /Library/Application Support

removing adware from application support folder step 2
In the “Application Support” folder, look for any recently-added suspicious folders. For example, “MplayerX” or “NicePlayer”, and move these folders to the Trash.

step3Check for adware-generated files in the ~/Library/LaunchAgents folder:

removing adware from ~launch agents folder step 1


In the Go to Folder bar, type: ~/Library/LaunchAgents

removing adware from ~launch agents folder step 2

In the “LaunchAgents” folder, look for any recently-added suspicious files and move them to the Trash. Examples of files generated by adware - “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, “kuklorest.update.plist”, etc. Adware commonly installs several files with the same string.

step4Check for adware-generated files in the /Library/LaunchDaemons folder:

removing adware from launch daemons folder step 1
In the Go to Folder... bar, type: /Library/LaunchDaemons

removing adware from launch daemons folder step 2
In the “LaunchDaemons” folder, look for recently-added suspicious files. For example “com.aoudad.net-preferences.plist”, “com.myppes.net-preferences.plist”, "com.kuklorest.net-preferences.plist”, “com.avickUpd.plist”, etc., and move them to the Trash.

step 5 Scan your Mac with Combo Cleaner:

If you have followed all the steps in the correct order you Mac should be clean of infections. To be sure your system is not infected run a scan with Combo Cleaner Antivirus. Download it HERE. After downloading the file double click combocleaner.dmg installer, in the opened window drag and drop Combo Cleaner icon on top of the Applications icon. Now open your launchpad and click on the Combo Cleaner icon. Wait until Combo Cleaner updates it's virus definition database and click "Start Combo Scan" button.

scan-with-combo-cleaner-1

Combo Cleaner will scan your Mac for malware infections. If the antivirus scan displays "no threats found" - this means that you can continue with the removal guide, otherwise it's recommended to remove any found infections before continuing.

scan-with-combo-cleaner-2

After removing files and folders generated by the adware, continue to remove rogue extensions from your Internet browsers.

Ads by MarketService removal from Internet browsers:

safari browser iconRemove malicious extensions from Safari:

Remove ads by marketservice related Safari extensions:

safari browser preferences

Open Safari browser, from the menu bar, select "Safari" and click "Preferences...".

safari extensions window

In the preferences window, select "Extensions" and look for any recently-installed suspicious extensions. When located, click the "Uninstall" button next to it/them. Note that you can safely uninstall all extensions from your Safari browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Safari.

firefox browser iconRemove malicious plug-ins from Mozilla Firefox:

Remove ads by marketservice related Mozilla Firefox add-ons:

accessing mozilla firefox add-ons

Open your Mozilla Firefox browser. At the top right corner of the screen, click the "Open Menu" (three horizontal lines) button. From the opened menu, choose "Add-ons".

removing malicious add-ons from mozilla firefox

Choose the "Extensions" tab and look for any recently-installed suspicious add-ons. When located, click the "Remove" button next to it/them. Note that you can safely uninstall all extensions from your Mozilla Firefox browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Mozilla Firefox.

chrome-browser-iconRemove malicious extensions from Google Chrome:

Remove ads by marketservice related Google Chrome add-ons:

removing malicious google chrome extensions step 1

Open Google Chrome and click the "Chrome menu" (three horizontal lines) button located in the top-right corner of the browser window. From the drop-down menu, choose "More Tools" and select "Extensions".

removing malicious Google Chrome extensions step 2

In the "Extensions" window, look for any recently-installed suspicious add-ons. When located, click the "Trash" button next to it/them. Note that you can safely uninstall all extensions from your Google Chrome browser - none are crucial for normal browser operation.

  • If you continue to have problems with browser redirects and unwanted advertisements - Reset Google Chrome.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Removal Instructions in other languages
Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Ads by MarketService QR code
Scan this QR code to have an easy access removal guide of Ads by MarketService on your mobile device.
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