How To Remove AgentUpdater Adware [Virus Removal Guide]
Written by: Stelian Pilici
Published on:
AgentUpdater is a potentially unwanted program that injects advertisements into websites you visit and redirects your browser search queries.
What is AgentUpdater?
AgentUpdater is a malicious program that hijacks your browser homepage and search engine and displays unwanted advertisements not originating from the sites you are browsing. To do this, AgentUpdater uses a browser extension or program.
When installed on a computer, the AgentUpdater browser hijacker will redirect your browser search queries through AgentUpdater Search, which will redirect to search result pages from search.yahoo.com. This is most likely done to generate advertising revenue by using Yahoo Search for its search results. AgentUpdater will also open new tabs in the browser that display advertisements trying to sell software, push fake software updates, and tech support scams.
When the AgentUpdater browser hijacker is installed on a computer, common symptoms include:
Your web browser’s default search engine is AgentUpdater Search
Your browser’s search queries are redirected through AgentUpdater Search
The “AgentUpdater” browser extension or program is installed on your Mac
How was AgentUpdater installed on my computer?
AgentUpdater is installed by the users, whether that is knowingly or not. Often, this type of program is offered through advertisements or bundled with other software, leaving the user puzzled about where this software came from. Unfortunately, some free downloads do not adequately disclose that other software will also be installed and you may find that you have installed AgentUpdater without your knowledge.
Image: Malicious Ads distributing AgentUpdater
If you do not know how AgentUpdater was installed or are concerned other extensions or unwanted programs may be installed on your Mac, you can use the removal guide below.
Removal instructions for AgentUpdater browser hijacker
This malware removal guide may appear overwhelming due to the number of steps and numerous programs that are being used. We have only written it this way to provide clear, detailed, and easy-to-understand instructions that anyone can use to remove malware for free. Please perform all the steps in the correct order. If you have any questions or doubts at any point, stop and ask for our assistance.
To remove AgentUpdater from your Mac, follow these steps:
Profiles are used by IT admins in businesses to control the behavior of their Macs. These profiles can configure a Mac to do many different things, some of which are not otherwise possible. When it comes to home users, adware and browser hijackers are using the configuration profile to prevent users from removing malicious programs from the computer. This also prevents the user from changing that behavior in the browser’s settings.
In this first step, we will check your computer to see if any configuration profiles are installed. To do this, follow the below steps:
Open “System Preferences”
From the Apple menu, select System Preferences.
Search for “Profiles”
When the System Preferences window opens, search for the Profiles icon.
If there isn’t a Profiles icon, you don’t have any profiles installed, which is normal and you can continue with the next steps.
Remove the malicious profiles
If there’s a Profile icon, click on it and select any suspicious profile that you want to remove, and then press the – (minus) button. Click Remove to remove the profile.
STEP 2: Delete malicious apps
In this second step, we will try to identify and remove any malicious apps and files that might be installed on your computer. Sometimes redirects or adware programs can have usable Uninstall entries that can be used to remove these programs.
Quit the malicious programs
On the Apple menu bar, in the top-right corner, if you see any unknown or suspicious icon, click on it and then select Quit.
Open “Finder”
Click the Finder application on your dock.
Click on “Applications”
In the Finder left pane, click on “Applications“.
Find and remove the malicious app.
The “Applications” screen will be displayed with a list of all the apps installed on your device. Scroll through the list until you find the malicious app, right-click it, and then click “Move to Trash”.
Look out for any suspicious program that could be behind all the drama – anything you don’t remember downloading or that doesn’t sound like a genuine program. Here are some known malicious programs: SearchMine, TakeFresh, TopResults, FeedBack, ApplicationEvents, GeneralOpen, PowerLog, MessengerNow, ImagePrime, GeneralNetSearch, Reading Cursors, GlobalTechSearch, PDFOnline-express, See Scenic Elf, MatchKnowledge, Easy Speedtest, or WebDiscover.
Click “Empty Trash”
On the dock, right-click on the trash icon and select “Empty Trash”. Doing so deletes the Trash’s contents, including the program that you just sent to the Trash.
Find and remove the malicious files
Click the desktop to make sure you’re in the Finder, choose “Go” then click on “Go to Folder“.
Type or copy/paste each of the below paths into the window that opens, then click Go.
/Library/LaunchAgents
~/Library/LaunchAgents
/Library/Application Support
/Library/LaunchDaemons
Look out for any suspicious files that could be behind all the drama – anything you don’t remember downloading or that doesn’t sound like a genuine program. These are some known malicious files: “com.adobe.fpsaud.plist” “installmac.AppRemoval.plist”, “myppes.download.plist”, “mykotlerino.ltvbit.plist”, or “com.myppes.net-preferences.plist”. When you find a malicious file move it to the Trash.
STEP 3: Reset browsers back to default settings
In this third step, we will remove spam push notifications and malicious extensions, and change to default any settings that might have been changed by malware. For each browser that you have installed on your computer, please click on the tab below and follow the displayed steps to reset that browser.
Safari BrowserChrome for Mac BrowserFirefox for Mac Browser
Remove malicious extensions and settings from Safari
To remove malware from Safari we will check if there are any malicious extensions installed on your browser and what settings have been changed by this malicious program.
Go to Safari’s “Preferences”.
On the menu bar, click the “Safari” menu and select “Preferences”.
Check Homepage.
This will open a new window with your Safari preferences, opened to the “General” tab. Some browser hijackers may change your default homepage, so in the Homepage field make sure it’s a web page you want to use as your start-up page.
Click “Extensions”
Next, click on the “Extensions” tab.
Find and uninstall malicious extensions.
The “Extensions” screen will be displayed with a list of all the extensions installed on Safari. Look out for any suspicious browser extension that could be behind all the drama – anything you don’t remember downloading or that doesn’t sound like a genuine extension. By default, there are no extensions installed on Safari so it’s safe to remove an extension
Remove spam notifications ads
Click Preferences, click Websites, then click Notifications. Deselect “Allow websites to ask for permission to send push notifications”.
Remove all data stored by websites on your computer.
In the Safari menu, choose “Preferences…”, select “Privacy” at the top of the new window that appears, and then click the “Manage Website Data” button.
In the next dialog box, click “Remove All“. It will ask you if you are sure you want to remove all data stored by websites on your computer. Select “Remove Now” to clear data that could be used to track your browsing.
Empty Safari Caches.
From your Safari menu bar, click Safari and select Preferences, then select the Advanced tab. Enable the checkbox to “Show Develop menu in menu bar“.
From the menu bar select Develop, then click on Empty Caches as seen in the image below.
Remove malware from Chrome for Mac
To remove malware from Chrome for Mac we will reset the browser settings to their default. Doing these steps will erase all configuration information from Chrome such as your home page, tab settings, saved form information, browsing history, and cookies. This process will also disable any installed extensions. All of your bookmarks, though, will be preserved.
Click on the three dots at the top right and go to Settings.
Click on Chrome’s main menu button, represented by three dots at the top right corner. Now click on the menu option labeled Settings as shown by the arrow in the picture below, which will open the basic settings screen.
In the left sidebar, click on the “Reset and Cleanup” option.
In the left sidebar, click on “Reset and clean up“.
Click “Reset settings to their original defaults”.
Now click on the “Reset settings to their original defaults”. link as shown in the image below.
Click “Reset Settings” button.
A confirmation dialog should now be displayed, detailing the components that will be restored to their default state should you continue with the reset process. To complete the restoration process, click on the “Reset Settings” button.
(Optional) Reset Chrome Data Sync.
In case a malicious extension reinstalls itself even after performing a browser reset, you have an additional option to reset the data sync for your browser. To do this, navigate to chrome.google.com/sync and click on the Clear Data button.
Remove malware from Firefox for Mac
To remove malware from Firefox for Mac we will reset the browser settings to its default. The reset feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks, passwords, web form auto-fill information, browsing history, and open tabs.
Go to the “Help” menu.
Click on Firefox’s main menu button, represented by three horizontal lines. When the drop-down menu appears, select the option labeled “Help“.
Click “Troubleshooting Information”.
Next click on the “Troubleshooting Information” option as indicated by the arrow in the image below. This will bring you to a Troubleshooting page.
Click on “Refresh Firefox”
Click the “Refresh Firefox” button in the upper-right corner of the “Troubleshooting Information” page.
Confirm.
To continue, click on the “Refresh Firefox” button in the new confirmation window that opens.
Click on “Finish”.
Firefox will close itself and will revert to its default settings. When it’s done, a window will list the information that was imported. Click on the “Finish“.
Your old Firefox profile will be placed on your desktop in a folder named “Old Firefox Data“. If the reset didn’t fix your problem you can restore some of the information not saved by copying files to the new profile that was created. If you don’t need this folder any longer, you should delete it as it contains sensitive information.
STEP 4: Run a scan with Malwarebytes for Mac to remove malware
In this final step, we will scan the computer with Malwarebytes for Mac to find and remove any malicious programs that might be installed on your Mac.
Malwarebytes for Mac is an on-demand scanner that can destroy many types of malware that other software tends to miss without costing you absolutely anything. When it comes to cleaning up an infected device, Malwarebytes has always been free, and we recommend it as an essential tool in the fight against malware.
Download Malwarebytes for Mac.
You can download Malwarebytes for Mac by clicking the link below.
When Malwarebytes has finished downloading, double-click on the setup file to install Malwarebytes on your computer. In most cases, downloaded files are saved to the Downloads folder.
Follow the on-screen prompts to install Malwarebytes.
When the Malwarebytes installation begins, you will see the Malwarebytes for Mac Installer which will guide you through the installation process. Click “Continue“, then keep following the prompts to continue with the installation process.
When your Malwarebytes installation completes, the program opens to the Welcome to Malwarebytes screen. Click the “Get started” button.
Select “Personal Computer” or “Work Computer”.
The Malwarebytes Welcome screen will first ask you what type of computer are you installing this program, click either Personal Computer or Work Computer.
Click on “Scan”.
To scan your computer with Malwarebytes, click on the “Scan” button. Malwarebytes for Mac will automatically update the antivirus database and start scanning your computer for malware.
Wait for the Malwarebytes scan to complete.
Malwarebytes will scan your computer for adware, browser hijackers, and other malicious programs. This process can take a few minutes, so we suggest you do something else and periodically check on the status of the scan to see when it is finished.
Click on “Quarantine”.
When the scan has been completed, you will be presented with a screen showing the malware infections that Malwarebytes has detected. To remove the malware that Malwarebytes has found, click on the “Quarantine” button.
Restart computer.
Malwarebytes will now remove all the malicious files that it has found. To complete the malware removal process, Malwarebytes may ask you to restart your computer.
Your computer should now be free of the AgentUpdater browser hijacker and other malware.
If your current antivirus allowed a malicious program on your computer, you might want to consider purchasing the full-featured version of Malwarebytes Anti-Malware to protect against these types of threats in the future. If you are still experiencing problems while trying to remove a malicious program from your computer, please ask for help in our Mac Malware Removal Help & Support forum.
How to Stay Safe Online
Here are 10 basic security tips to help you avoid malware and protect your device:
Use a good antivirus and keep it up-to-date.
It's essential to use a good quality antivirus and keep it up-to-date to stay ahead of the latest cyber threats. We are huge fans of Malwarebytes Premium and use it on all of our devices, including Windows and Mac computers as well as our mobile devices. Malwarebytes sits beside your traditional antivirus, filling in any gaps in its defenses, and providing extra protection against sneakier security threats.
Keep software and operating systems up-to-date.
Keep your operating system and apps up to date. Whenever an update is released for your device, download and install it right away. These updates often include security fixes, vulnerability patches, and other necessary maintenance.
Be careful when installing programs and apps.
Pay close attention to installation screens and license agreements when installing software. Custom or advanced installation options will often disclose any third-party software that is also being installed. Take great care in every stage of the process and make sure you know what it is you're agreeing to before you click "Next."
Install an ad blocker.
Use a browser-based content blocker, like AdGuard. Content blockers help stop malicious ads, Trojans, phishing, and other undesirable content that an antivirus product alone may not stop.
Be careful what you download.
A top goal of cybercriminals is to trick you into downloading malware—programs or apps that carry malware or try to steal information. This malware can be disguised as an app: anything from a popular game to something that checks traffic or the weather.
Be alert for people trying to trick you.
Whether it's your email, phone, messenger, or other applications, always be alert and on guard for someone trying to trick you into clicking on links or replying to messages. Remember that it's easy to spoof phone numbers, so a familiar name or number doesn't make messages more trustworthy.
Back up your data.
Back up your data frequently and check that your backup data can be restored. You can do this manually on an external HDD/USB stick, or automatically using backup software. This is also the best way to counter ransomware. Never connect the backup drive to a computer if you suspect that the computer is infected with malware.
Choose strong passwords.
Use strong and unique passwords for each of your accounts. Avoid using personal information or easily guessable words in your passwords. Enable two-factor authentication (2FA) on your accounts whenever possible.
Be careful where you click.
Be cautious when clicking on links or downloading attachments from unknown sources. These could potentially contain malware or phishing scams.
Don't use pirated software.
Avoid using Peer-to-Peer (P2P) file-sharing programs, keygens, cracks, and other pirated software that can often compromise your data, privacy, or both.
To avoid potential dangers on the internet, it's important to follow these 10 basic safety rules. By doing so, you can protect yourself from many of the unpleasant surprises that can arise when using the web.
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Meet Stelian Pilici
Stelian leverages over a decade of cybersecurity expertise to lead malware analysis and removal, uncover scams, and educate people. His experience provides insightful analysis and valuable perspective.
If there isn’t a Profiles icon, you don’t have any profiles installed, which is normal and you can continue with the next steps.
