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Slithermon Adware

Also Known As: Ads by Slithermon
Type: Adware
Damage level: Medium

What is Slithermon?

Slithermon is a rogue application that supposedly allows users to play a popular browser arcade game called "Slither.io" directly from the desktop. This functionality may seem legitimate and useful, however, this application is not genuine and has no association with the actual game.

Slithermon often infiltrates systems without users' consent. Furthermore, it displays intrusive online advertisements and records various user/system data. For these reasons, Slithermon is categorized as adware and a potentially unwanted program (PUP).

Slithermon adware

Following infiltration, Slithermon employs a 'virtual layer' to generate pop-up, banner, coupon, and other similar advertisements. The virtual layer enables placement of third party graphical content on any site. Therefore, the generated advertisements often conceal underlying content, significantly diminishing the web browsing experience.

They can also lead to malicious websites and even accidental clicks can result in high-risk adware or malware infections. Another downside is information tracking. Slithermon continually records IP addresses, search queries, websites visited, pages viewed, and other similar data.

This information might include personally identifiable details that developers of Slithermon share with cooperating third party companies (potentially, cyber criminals) who generate revenue by misusing personal data.

Therefore, the presence of an information-tracking app such as Slithermon on your system can lead to serious privacy issues or even identity theft. You are strongly advised to eliminate this PUP immediately.

Slithermon has very similar characteristics to Traffic Exchange, GeoByPass, Windows Management, and hundreds of other adware-type applications. By offering a number of 'useful features', adware often tricks users to install. Be aware, however, that the only purpose of all adware is to generate revenue for the developers.

These applications merely deliver intrusive online advertisements and collect personal information. They are useless for regular users.

How did Slithermon install on my computer?

Slithermon is distributed using a deceptive software marketing method called "bundling". Research shows that many users rush the download/installation procedures and skip most/all steps. Therefore, Slithermon is concealed within the "Custom/Advanced" settings section. By skipping this section, users expose their systems to risk of various infections and compromise their privacy.

How to avoid installation of potentially unwanted applications?

Installation of PUPs can be prevented by taking two simple steps. Firstly, PUPs are distributed using the bundling method, and therefore, never rush the download or installation processes - closely analyze each step within the "Custom/Advanced" settings. Secondly, cancel all additionally-included programs and offers to download/install them.

Deceptive free software installers distributing Slithermon adware:

slithermon adware installer sample 2 Installer promoting Slithermon adware

Screenshot of Slithermon application:

Potentially unwanted program Slithermon

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Quick menu:

Slithermon adware removal:

Windows 11 users:

Accessing Apps and Features in Windows 11

Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.

Windows 10 users:

Accessing Programs and Features (uninstall) in Windows 8

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Windows 7 users:

Accessing Programs and Features (uninstall) in Windows 7

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

macOS (OSX) users:

Uninstall app in OSX (Mac)

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

Slithermon adware uninstall via Control Panel

In the uninstall programs window, look for "Slithermon", select this entry and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted program that causes Slithermon ads, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.

Remove Slithermon adware from Internet browsers:

At time of research, Slithermon did not install its browser plug-ins on Internet Explorer, Google Chrome, or Mozilla Firefox, however, it was bundled with other adware. Therefore, you are advised to remove all potentially unwanted browser add-ons from your Internet browsers.

Video showing how to remove potentially unwanted browser add-ons:

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing Slithermon ads from Internet Explorer step 1

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".

Removing Slithermon ads from Internet Explorer step 2

Optional method:

If you continue to have problems with removal of the ads by slithermon, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows XP

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows 7

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing Slithermon  ads from Google Chrome step 1

Click the Chrome menu icon Google Chrome options icon (at the top right corner of Google Chrome), select "Tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons, select these entries and click the trash can icon.

Removing Slithermon ads from Google Chrome step 2

Optional method:

If you continue to have problems with removal of the ads by slithermon, reset your Google Chrome browser settings. Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plug-ins from Mozilla Firefox:

Removing Slithermon ads from Mozilla Firefox step 1

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.

Removing Slithermon ads from Mozilla Firefox step 2

Optional method:

Computer users who have problems with ads by slithermon removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

removing adware from safari step 1 - accessing preferences

Make sure your Safari browser is active, click Safari menu, and select Preferences....

removing adware from safari step 2 - removing extensions

In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing adware from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.

Removing adware from Microsoft Edge step 2

Optional method:

If you continue to have problems with removal of the ads by slithermon, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Summary:

declining installation of adware while downloading free software sampleCommonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.

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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.

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Software uninstall instructions
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 Slithermon QR code
Scan this QR code to have an easy access removal guide of Ads by Slithermon on your mobile device.
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