.Osk Ransomware Virus Removal (+.Osk File Recovery) June 2018 Update

The encrypted files may not be the only damage done to you. parasite may still be hiding on your PC. To determine whether you've been infected with ransomware, we recommend downloading SpyHunter.

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

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This page aims to help you remove .Osk Ransomware for free. Our instructions also cover how any .Osk file can be recovered.

Nowadays, digital data and the way in which it’s handled is of utmost importance regardless of whether we are talking about sensitive professional information or about the personal data storage of any regular user. Almost all PC users keep some sort of valuable data files on their machines that they would certainly not want to use. The importance of computer-stored data becomes even greater if we are talking about the working records of big companies, schools, hospitals, government institutions, etc. No doubt, such data is a very tempting target for hacking attacks and cyber criminals have had that figured out for quite some time now. You have almost certainly already heard about a particularly dangerous form of malware called Ransomware. Viruses that belong to this category are able to encrypt the files of their victims and keep them that way unless the targeted user makes a payment to the hacker who’s conducting the attack. Although Ransomware has been around for quite some time, it wasn’t up until the past several years that those viruses really started to become a world-wide threat. And the worst part about that is the fact that modern Ransomware versions are some of the most advanced, state-of-the-art computer threats that one could have the misfortune of encountering. Oftentimes, even the best cyber-security experts are rendered powerless to counteract such infections.

.Osk Ransomware File

.Osk Ransomware Virus

In the next lines, we will put an emphasis on one of the latest versions of Ransomware that has been recently detected and reported – the virus’ threat is .Osk and below you will be able to learn more about it. Unfortunately, many users have already fallen prey to this insidious malware threat and we assume that some of this article’s readers have actually come to this page exactly because .Osk has managed to lock-up their files and is currently blackmailing them into paying a ransom for the decryption key that can unseal the locked-up data. We won’t lie to you, if you are one of those unfortunate users, there’s no guarantee that you’d be able to recover your files (at least for the time being). Oftentimes, even making the ransom payment would not restore the access to the encrypted documents as many hackers who use Ransomware have been known to simply take the money without sending a decryption key to their victims. Potential alternative file-restoration methods are available but might not always be effective. Down below, we have tried our best to put together a removal guide for .Osk with added instructions concerning the file-restoration stage. We can’t promise you that the suggested data-recovery methods from the guide will work in your case but it costs nothing to give them a try. To help you with the actual removal of the virus, we have also posted on this page a reliable anti-malware tool that can help you eliminate .Osk so that it can no longer encrypt anything inside your PC.

.Osk Ransomware Virus Removal



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. 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. 

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 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.

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


Go in Startup —> Uncheck entries that have “Unknown” as Manufacturer.

  • Please note that ransomware may even include a fake Manufacturer name to its process. Make sure you check out every process here is legitimate.


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.

Type Regedit in the windows search field and press EnterOnce inside, press CTRL and F together and type the virus’s Name. 

Search for the ransomware  in your registries and delete the entries. Be extremely careful –  you can damage your system if you delete entries not related to the ransomware.

Type each of the following in the Windows Search Field:

  1. %AppData%
  2. %LocalAppData%
  3. %ProgramData%
  4. %WinDir%
  5. %Temp%

Delete everything in Temp. The rest just check out for anything recently added. Remember to leave us a comment if you run into any trouble!


How to Decrypt .Osk files

We have a comprehensive (and daily updated) guide on how to decrypt your files. Check it out here.

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!


Another word that can be used to refer to infections like .Osk is cryptoviruses as those infections utilize the so-called process of encryption in order to lock the targeted data. This is important as it’s precisely due to the use of the encryption method that most Ransomware viruses are able to stay under the radar without getting detected. You see, on its own, encryption isn’t something harmful – it simply secures the selected files and makes them inaccessible for anyone who does not have the access key. Normally, when not used by a Ransomware, an encryption process should allow the user to protect their files from unauthorized access as they’d be the only one to have the decryption key. Obviously, this whole procedure is reverted when it is used by a Ransomware. If a virus like .Osk locks-up your files, the key that can unseal them would be initially available only to the hacker. The thing is that a lot of antivirus programs tend to fail at spotting the encryption process and marking it as a potential danger as, like we already said above, it doesn’t cause any actual harm. Symptoms from a Ransomware are also a rarity – increased RAM and CPU use might be possible red-flags but noticing that is oftentimes unlikely.

Preventing future infections

It’s always better to simply keep your PC protected and avoid malware infections. To make sure that no more viruses come to you in future, our advise for you is to be really watchful and careful out there, on the Internet. If you see a shady-looking link, pop-up, banner or ad or if you receive some questionable message from an unknown sender, it’s best if you avoid interacting with them as they could be potential security risks. Also, downloading pirated or low-quality software is yet another possible way in which you can get your system infected by some nasty malware virus like .Osk . Another good piece of advice is to always have backup copies of your important data which copies must be stored inside a separate location – an online cloud, a external hard-disk or even on something as simple as a flash drive. That way, your files will always be safe even if your computer gets infected by some dangerous piece of malware.


Name .Osk
Type Ransomware
Danger Level High (Ransomware is by far the worst threat you can encounter)
Symptoms System instability and performance slow-down due to RAM and CPU spikes caused by the virus.
Distribution Method Shady e-mails with compromised attachments, pirated downloadable content, misleading Internet ads, illegal websites, backdoor viruses and others.
Data Recovery Tool Currently Unavailable
Detection Tool

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