s.0cf.io Malware

Parasite may reinstall itself multiple times if you don't delete its core files. We recommend downloading SpyHunter to scan for malicious programs installed with it. This may save you hours and cut down your time to about 15 minutes. 

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s.0cf.io is a browser-hijacking program that typically forces the system’s main web browser to display advertisements, open new tabs and redirect users to sponsored pages. s.0cf.io can target commonly used web browsers such as Chrome, Firefox and Edge.


The s.0cf.io malware can redirect your browser to display pop up ads and messages.

The appearance of a significant number of banner ads, pop-ups, box messages and other types of web commercials is one of the very first and most noticeable symptoms of a browser hijacker infection. Another sure sign that a piece such as s.0cf.io has infected your system is that your browsing programs can start redirecting your searches to pages that you don’t want to visit. In other words, the hijacked browser will constantly reroute you to various web locations in the middle of your surfing session. On top of that, s.0cf.io may set a new browser homepage and may change the default search engine without even asking you for approval. These browser changes are typically made to ensure that you see more sponsored results and visit particular URLs the very moment you start your browser or open a new tab.

What irritates users a lot is the fact that they cannot remove or uninstall the new homepage and search engine no matter what they do. Even a browser change or reinstall of the browsing program cannot save them from the settings that the browser hijacker has introduced. This is because programs of this category typically don’t have an uninstallation option like most other browser add-ons and apps. In order to deal with s.0cf.io effectively, users will have to detect and remove the individual components related to the hijacker’s ad-generating and page-redirecting activities. Unfortunately, this task can often be very frustrating because, if some of the components are left behind, the activity of the hijacker won’t stop. This is the reason why we have created a free removal guide with detailed instructions and screenshots that explain exactly how to locate and eliminate all the components of s.0cf.io. We encourage you to use it if you are confident that you will succeed with it but, in case you are not that tech savvy or don’t want to waste your time, the professional removal tool on this page can quickly uninstall the unwanted program without any hassle.

The s.0cf.io Malware

Browser hijackers such as the s.0cf.io malware are usually distributed through a method called software bundling. This method allows software developers to group two or more components in one setup package and let users install them all together. Many free apps come in a bundle with additional ad-generating and page-redirecting programs like the s.0cf.io malware inside their installation package. The good news is that these additional programs can easily be avoided when you pay close attention to the EULA and manually configure the installation process through the “Advanced/Custom” settings.

Of course, in order to stay away from unwanted software more effectively you should be selective about your download sources. Sketchy links, spam messages, pop-ups and open source download platforms may be sources not only of browser hijackers but also of malicious software such as viruses, Trojans, Rootkits, Ransomware and Spyware. In this regard, it is also a smart idea not to click on any online ads and links that get randomly displayed on your screen because these can easily deliver a Ransomware, a Trojan or some other nasty virus into your system.


Name s.0cf.io
Type Browser Hijacker
Danger Level Medium (nowhere near threats like Ransomware, but still a security risk)
Symptoms Browser Hijackers typically force the web browser to display various sponsored advertisements and page-redirect prompts during browsing sessions.
Distribution Method Software bundling is the most common method that is used to distribute Browser Hijackers.
Detection Tool

Remove s.0cf.io Malware

To try and remove s.0cf.io quickly you can try this:

  1. Go to your browser’s settings and select More Tools (or Add-ons, depending on your browser).
  2. Then click on the Extensions tab.
  3. Look for the s.0cf.io extension (as well as any other unfamiliar ones).
  4. Remove s.0cf.io by clicking on the Thrash Bin icon next to its name.
  5. Confirm and get rid of s.0cf.io and any other suspicious items.

If this does not work as described please follow our more detailed s.0cf.io removal guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide


Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).



We get asked this a lot, so we are putting it here: Removing parasite manually may take hours and damage your system in the process. We recommend downloading SpyHunter to see if it can detect parasite files for you.

Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab (the “Details” Tab on Win 8 and 10). Try to determine which processes are dangerous.


Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at: https://howtoremove.guide/online-virus-scanner/

Scan Results

Virus Scanner Result

After you open their folder, end the processes that are infected, then delete their folders.

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections.


Hold together the Start Key and R. Type appwiz.cpl –> OK.


You are now in the Control Panel. Look for suspicious entries. Uninstall it/them.

Type msconfig in the search field and hit enter. A window will pop-up:


Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.


To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

If you want to avoid the risk, we recommend downloading SpyHunter
a professional malware removal tool.

More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

Hold the Start Key and R copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

hosts_opt (1)

If there are suspicious IPs below “Localhost” – write to us in the comments.

Open the start menu and search for Network Connections (On Windows 10 you just write it after clicking the Windows button), press enter.

  1. Right-click on the Network Adapter you are using —> Properties —> Internet Protocol Version 4 (ICP/IP), click Properties.
  2. The DNS line should be set to Obtain DNS server automatically. If it is not, set it yourself.
  3. Click on Advanced —> the DNS tab. Remove everything here (if there is something) —> OK.



  • After you complete this step, the threat will be gone from your browsers. Finish the next step as well or it may reappear on a system reboot.

Right click on the browser’s shortcut —> Properties.

NOTE: We are showing Google Chrome, but you can do this for Firefox and IE (or Edge).


Properties —–> Shortcut. In Target, remove everything after .exe.

ie9-10_512x512 Remove s.0cf.io from Internet Explorer:

Open IE, click IE GEAR —–> Manage Add-ons.

pic 3

Find the threat —> Disable. Go to IE GEAR —–> Internet Options —> change the URL to whatever you use (if hijacked) —> Apply.

firefox-512 Remove s.0cf.io from Firefox:

Open Firefox, click mozilla menu ——-> Add-ons —-> Extensions.

pic 6

Find the adware/malware —> Remove.
chrome-logo-transparent-backgroundRemove s.0cf.io from Chrome:

Close Chrome. Navigate to:

C:/Users/!!!!USER NAME!!!!/AppData/Local/Google/Chrome/User Data. There is a Folder called “Default” inside:

Rename the Folder to Backup Default

Rename it to Backup Default. Restart Chrome.


Type Regedit in the windows search field and press Enter.

Inside, press CTRL and F together and type the threat’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!

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