Coomer.su – Is It Safe? [Malware Check]

Is Coomer.su Safe?

Your antivirus blocked a connection to coomer.su, the browser is redirecting there without deliberate navigation, or you want to understand the security risk before visiting. Read this article right now to understand the threat — coomer.su is not safe from a cybersecurity standpoint.

Coomer.su is explicitly blocked by Malwarebytes with a riskware classification — one of the more significant security signals a domain can receive from a mainstream threat database, because riskware is not a false positive category; it means Malwarebytes has actively documented the domain’s role in harmful activity and made the decision to protect its users from it by default. The specific risk documented for coomer.su is that the platform is abused to share malicious files alongside the user-submitted content it hosts. This is a documented pattern for large-scale user content platforms in this category: the infrastructure that allows any user to upload files also allows threat actors to plant malware, spyware, and adware among legitimate content, and moderation systems are not reliable enough to catch every malicious file before it is downloaded. The platform has grown rapidly in the 2024–2026 period, attracting both a large visitor base and the attention of threat actors who target high-traffic file-sharing environments.

How Did I Get Coomer.su Redirects or Warnings?

The coomer.su warning or redirect typically arrives through one of the following routes:

• A Malwarebytes block notification during a direct visit — If Malwarebytes is installed and active, it will block connections to coomer.su automatically and display a notification. This is the most common first encounter: the user attempted to visit and the security tool intervened before the page loaded.
• A download from the platform delivering a malicious file — Files downloaded from coomer.su — particularly archives, executables, or files with unfamiliar extensions distributed alongside content — carry a documented risk of delivering trojans or infostealer components alongside the intended content.
• Adware on the device generating the redirect — If the browser is being sent to coomer.su without deliberate navigation, an adware program installed through software bundling may be generating the redirect as part of an ad-revenue operation targeting high-traffic adult platforms.
• A link shared through a community or chat platform — Links to coomer.su content are widely distributed through Discord servers and other community platforms, some of which may be associated with further redirect chains or malicious content hosted at the linked destination.

What Security Risks Does Coomer.su Create?

The riskware classification reflects a documented and ongoing threat picture. Here is the full picture:

• Malicious files distributed alongside user-submitted content — The platform’s open file-upload model has been abused to distribute malware, with threat actors hiding malicious payloads in archives and files that appear to contain legitimate content. Downloading any file from the platform without verifying it through an anti-malware scan first carries real risk.
• Aggressive advertising from unvetted ad networks — The platform relies on advertising revenue from third-party ad networks that are not held to mainstream advertising standards, meaning ads displayed during a visit can include malicious advertising that attempts to redirect the browser, push notification permission requests, or trigger drive-by download attempts without any click required.
• Push notification permission prompts — Visits to the platform may trigger push notification permission requests that, if accepted, grant ad networks connected to the platform standing permission to deliver spam and scareware to the desktop at any hour.
• Behavioral tracking through embedded scripts — Trackers embedded throughout the site collect browsing behavior and device fingerprinting data for data collection purposes throughout every visit.

What Should You Do?

If Malwarebytes is blocking coomer.su, the block is correct — do not add an exception. If files were downloaded from the platform, scan every file with a dedicated anti-malware tool before opening any of them, and treat downloaded archives as potentially carrying malicious components even when the outer file appears to be legitimate content. If the browser is being redirected to coomer.su without deliberate navigation, run a full scan with an anti-adware tool to identify and remove the adware component generating the redirects. Check your browser’s notification settings and remove coomer.su from the allowed list if it appears there. Follow the complete removal guide below this article for the full steps across Windows, Mac, and Android.

Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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• Windows
• Mac OS X
• Google Chrome
• Mozilla Firefox
• Microsoft Edge
• Safari
• Internet Explorer
• Stop Push Pop-ups

How to Remove Coomer.su from Windows.

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Step 1: Scan for Coomer.su with SpyHunter Anti-Malware Tool

1.1 Click on the "Download" button to proceed to SpyHunter's download page.

Download

Malware Removal Tool

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It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

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1.2 After you have installed SpyHunter, wait for it to update automatically.

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1.3 After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

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1.4 After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

If any threats have been removed, it is highly recommended to restart your PC.

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Step 2: Boot Your PC In Safe Mode

2.1 Hold Windows key + R

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2.2 The "Run" Window will appear. In it, type "msconfig" and click OK.

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2.3 Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".

Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

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2.4 When prompted, click on "Restart" to go into Safe Mode.

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2.5 You can recognise Safe Mode by the words written on the corners of your screen.

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Step 3: Uninstall Coomer.su and related software from Windows

Uninstall Steps for Windows 11

1 Go to the search bar and type "Add or Remove Programs" and then click it.

2 Locate the software that you want to uninstall click on the three dots and click "Uninstall" to begin the process.

3 Follow the uninstall steps until the software has been effectively removed from your computer

Uninstall Steps for Windows 10 and Older Versions

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

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1 Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

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2 In the field type in "appwiz.cpl" and press ENTER.

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3 This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall" Follow the instructions above and you will successfully uninstall most programs.

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Step 4: Clean Any registries, Created by Coomer.su on Your PC.

The usually targeted registries of Windows machines are the following:

• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Coomer.su there. This can happen by following the steps underneath:

4.1 Open the Run Window again, type "regedit" and click OK.

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4.2 When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

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4.3 You can remove the value of the virus by right-clicking on it and removing it.

Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

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Video Removal Guide for Coomer.su (Windows).

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Get rid of Coomer.su from Mac OS X.

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Step 1: Uninstall Coomer.su and remove related files and objects

1.1 Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

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1.2 Find Activity Monitor and double-click it:

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1.3 In the Activity Monitor look for any suspicious processes, belonging or related to Coomer.su:

Tip: To quit a process completely, choose the “Force Quit” option.

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1.4 Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

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1.5 In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Coomer.su. If you find it, right-click on the app and select “Move to Trash”.

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1.6 Select Accounts, after which click on the Login Items preference.

Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Coomer.su. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

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1.7 Remove any left-over files that might be related to this threat manually by following the sub-steps below:

• Go to Finder.
• In the search bar type the name of the app that you want to remove.
• Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
• If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove Coomer.su via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as Coomer.su. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

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Step 2: Scan for and remove Coomer.su files from your Mac

When you are facing problems on your Mac as a result of unwanted scripts and programs such as Coomer.su, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.

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Click the button below below to download SpyHunter for Mac and scan for Coomer.su:

Download

SpyHunter for Mac

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Video Removal Guide for Coomer.su (Mac)

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Remove Coomer.su from Google Chrome.

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Step 1: Start Google Chrome and open the drop menu

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Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"

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Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.

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Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.

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Erase Coomer.su from Mozilla Firefox.

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Step 1: Start Mozilla Firefox. Open the menu window:

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Step 2: Select the "Add-ons" icon from the menu.

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Step 3: Select the unwanted extension and click "Remove"

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Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.

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Uninstall Coomer.su from Microsoft Edge.

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Step 1: Start Edge browser.

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Step 2: Open the drop menu by clicking on the icon at the top right corner.

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Step 3: From the drop menu select "Extensions".

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Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.

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Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.

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Remove Coomer.su from Safari

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Step 1: Start the Safari app.

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Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.

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Step 3: From the menu, click on "Preferences".

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Step 4: After that, select the 'Extensions' Tab.

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Step 5: Click once on the extension you want to remove.

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Step 6: Click 'Uninstall'.

A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Coomer.su will be removed.

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How to Reset Safari
IMPORTANT: Before resetting Safari make sure you back up all your saved passwords within the browser in case you forget them.

Start Safari and then click on the gear leaver icon.

Click the Reset Safari button and you will reset the browser.

Eliminate Coomer.su from Internet Explorer.

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Step 1: Start Internet Explorer.

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Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'

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Step 3: In the 'Manage Add-ons' window.

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Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.

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Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.

Remove Push Notifications from Your Browsers

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Turn Off Push Notifications from Google Chrome

To disable any Push Notices from Google Chrome browser, please follow the steps below:

Step 1: Go to Settings in Chrome.

Step 2: In Settings, select “Advanced Settings”:

Step 3: Click “Content Settings”:

Step 4: Open “Notifications”:

Step 5: Click the three dots and choose Block, Edit or Remove options:

Remove Push Notifications on Firefox

Step 1: Go to Firefox Options.

Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":

Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”

Stop Push Notifications on Opera

Step 1: In Opera, press ALT+P to go to Settings.

Step 2: In Setting search, type “Content” to go to Content Settings.

Step 3: Open Notifications:

Step 4: Do the same as you did with Google Chrome (explained below):

Eliminate Push Notifications on Safari

Step 1: Open Safari Preferences.

Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".

Coomer.su-FAQ

What Is Coomer.su?

The Coomer.su threat is adware or browser redirect virus.

It may slow your computer down significantly and display advertisements. The main idea is for your information to likely get stolen or more ads to appear on your device.

The creators of such unwanted apps work with pay-per-click schemes to get your computer to visit risky or different types of websites that may generate them funds. This is why they do not even care what types of websites show up on the ads. This makes their unwanted software indirectly risky for your OS.

What Are the Symptoms of Coomer.su?

There are several symptoms to look for when this particular threat and also unwanted apps in general are active:

Symptom #1: Your computer may become slow and have poor performance in general.

Symptom #2: You have toolbars, add-ons or extensions on your web browsers that you don't remember adding.

Symptom #3: You see all types of ads, like ad-supported search results, pop-ups and redirects to randomly appear.

Symptom #4: You see installed apps on your Mac running automatically and you do not remember installing them.

Symptom #5: You see suspicious processes running in your Task Manager.

If you see one or more of those symptoms, then security experts recommend that you check your computer for viruses.

What Types of Unwanted Programs Are There?

According to most malware researchers and cyber-security experts, the threats that can currently affect your device can be rogue antivirus software, adware, browser hijackers, clickers, fake optimizers and any forms of PUPs.

What to Do If I Have a "virus" like Coomer.su?

With few simple actions. First and foremost, it is imperative that you follow these steps:

Step 1: Find a safe computer and connect it to another network, not the one that your Mac was infected in.

Step 2: Change all of your passwords, starting from your email passwords.

Step 3: Enable two-factor authentication for protection of your important accounts.

Step 4: Call your bank to change your credit card details (secret code, etc.) if you have saved your credit card for online shopping or have done online activities with your card.

Step 5: Make sure to call your ISP (Internet provider or carrier) and ask them to change your IP address.

Step 6: Change your Wi-Fi password.

Step 7: (Optional): Make sure to scan all of the devices connected to your network for viruses and repeat these steps for them if they are affected.

Step 8: Install anti-malware software with real-time protection on every device you have.

Step 9: Try not to download software from sites you know nothing about and stay away from low-reputation websites in general.

If you follow these recommendations, your network and all devices will become significantly more secure against any threats or information invasive software and be virus free and protected in the future too.

How Does Coomer.su Work?

Once installed, Coomer.su can collect data using trackers. This data is about your web browsing habits, such as the websites you visit and the search terms you use. It is then used to target you with ads or to sell your information to third parties.

Coomer.su can also download other malicious software onto your computer, such as viruses and spyware, which can be used to steal your personal information and show risky ads, that may redirect to virus sites or scams.

Is Coomer.su Malware?

The truth is that PUPs (adware, browser hijackers) are not viruses, but may be just as dangerous since they may show you and redirect you to malware websites and scam pages.

Many security experts classify potentially unwanted programs as malware. This is because of the unwanted effects that PUPs can cause, such as displaying intrusive ads and collecting user data without the user’s knowledge or consent.

About the Coomer.su Research

The content we publish on SensorsTechForum.com, this Coomer.su how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific, adware-related problem, and restore your browser and computer system.

How did we conduct the research on Coomer.su?

Please note that our research is based on independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware, adware, and browser hijacker definitions.
Furthermore, the research behind the Coomer.su threat is backed with VirusTotal.
To better understand this online threat, please refer to the following articles which provide knowledgeable details.