Ryuk Ransomware



Ryuk is a Ransomware-based infection, focused on preventing users from accessing their information. Ryuk uses data-encryption and targets personal files and system records, making them inaccessible without a decryption key.

Ryuk Ransomware

The Ryuk Ransomware will leave a .txt file with instructions

If a scary notification has suddenly appeared on your screen and it states that your files have been encrypted and you have to pay a ransom to decrypt them, then you have surely been attacked by a Ransomware virus. More precisely, you have probably landed on this page because of an infection with a recently discovered Ransomware-based cryptovirus called Ryuk. This virus is an advanced file-encrypting threat which targets computers all over the Internet, secretly taking blocking the access to their data and then proceeding to blackmail their owners. Upon the completion of the encryption, the malware places a ransom-demanding message on the victims’ screen and asks them to pay a certain amount of money, usually in Bitcoins or in some other cryptocurrency. Those, who agree to follow the ransom payment instructions are promised to receive a decryption key which is supposed to decrypt the encrypted files and convert them back to normal. Those who don’t fulfill the ransom demands, however, are threatened to never be able to access their files again. By landing on this page, you are probably hoping to find an alternative solution, which can help you deal with this nasty blackmailing scheme and eventually bypass the ransom payment. Fortunately, we have something to offer you here – below there is a Removal Guide and a trusted malware removal tool which may help you remove Ryuk Ransomware from your system. In the next paragraphs, you are also going to find useful information about the way this Ransomware operates as well as some helpful data protection and file-restoration tips, which may help you minimize the negative consequences of the infection without paying the cyber criminals.  

The Ryuk Ransomware

The Ryuk Ransomware is a cryptovirus that seeks to encrypt digital data that is stored on the infected computer. After the attack, the Ryuk Ransomware will ask for a ransom payment to release the encrypted files from the applied encryption.

The term Ransomware raises fear in many web users. This type of malware is famous for its dreadful attacks and their malicious consequences which, to this day, still have no a hundred percent effective method for counteraction. The successfulness of threats such as Ryuk Ransomware to an extent is a result of their ability to remain undetected by most forms of software security that the user might have on their PC. Such infections use various “social engineering” techniques to sneak inside people’s computers and rarely trigger any visible symptoms of their presence until they complete their malicious action. The main reason for that is the file encryption process which the Ransomware-based infections typically use. The file encryption process isn’t normally seen as something malicious because it’s original purpose is actually to help the users. This is one of the most secure and unbreakable data protection methods and is commonly used by software developers for securing important data. Your antivirus software will most probably not detect it as a dangerous process since the file encryption isn’t really going to actually harm or corrupt anything. Therefore, in most of the cases, users fail to spot the threat on time and the virus is allowed to seal the files it has targeted.

The Ryuk Ransomware Decryptor

The Ryuk file decryption is a file-decoding process that can make the encrypted files accessible again. For the Ryuk decryption to be performed, the users need to apply a decryption key, which is held by the hackers behind the Ransomware.

Sadly, the goal of the Ransomware is not to protect your data but to take it hostage by applying its secret algorithm which cannot be decrypted without a specially generated decryption key. That key, as you may guess, is generated at the hackers’ servers and they would gladly offer it to you in exchange for a big ransom sum. But what should you do if you don’t want to pay the ransom? Well, the first thing you should actually think about is how to remove the active malware from the computer. In the Removal Guide below, we have given you instructions for that. This way, you will be able to safely proceed with alternative solutions which may help you recover some of your files. One of the things you should definitely do is check for backup copies of your data. You may have such copies on external drives or on a cloud storage or you may keep some files on other devices, in your email, USB drives, CDs/DVDs, etc. Use them to get back some of your files or give a try to the file-restoration instructions that we have listed below.

Of course, you can decide to pay the ransom as well and hope that the hackers will send you the decryption key they promise. We need to warn you, though, that this course of action hides its risks. In fact, you may end up throwing away your money without getting anything in return because there are cases in which the hackers simply disappear when they get the ransom payment and they never send the so desperately wanted decryption key to their victims. If you are anyway ready to pay, it is far better to consider contacting a professional you trust and receive reliable help rather than sponsoring some anonymous cyber criminals who may trick you any day. Sadly, we cannot give you guarantees of which method will work the best in your particular case because, as we said above, Ransomware that lacks a single truly effective method for counteraction. Still, if there are alternatives that do not involve making the payment, we encourage you to give them a try.


Name Ryuk
Type Ransomware
Danger Level High (Ransomware is by far the worst threat you can encounter)
Symptoms Very few and unnoticeable ones before the ransom notification comes up.
Distribution Method From fake ads and fake system requests to spam emails and contagious web pages.
Data Recovery Tool [banner_table_recovery]
Detection Tool

How to Remove Ryuk Ransomware


Ryuk Ransomware

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).

Ryuk Ransomware


Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 

Ryuk Ransomware

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

Ryuk Ransomware
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
Ryuk RansomwareClamAV
Ryuk RansomwareAVG AV
Ryuk RansomwareMaldet

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.

Ryuk Ransomware

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:

Ryuk Ransomware

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:

Ryuk Ransomware

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.

Ryuk Ransomware

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!

Ryuk Ransomware 

How to Decrypt Ryuk 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!


About the author


Lidia Howler

Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.


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