How to remove RYUK Ransomware and decrypt .RYK or .rcrypted files

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What is RYUK Ransomware

RYUK Ransomware is virulent ransomware threat, based on the code of Hermes 2.1 and BitPaymer viruses. Researchers believe, that famous Lazarus Group is responsible for the development and implementation of the virus. Latest variations of this virus append .RYK or .rcrypted extension to encrypted files. RYUK Ransomware uses RSA-4096 and AES-256 encryption algorithms to encrypt user files and creates RyukReadMe.txt (or in some cases README.PLEASE.txt) file with following content:

First version of RYUK ransom note:

All files on each host in the network have been encrypted with a strong algorithm.
Backups were either encrypted or deleted or backup disks were formatted.
Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover.
We exclusively have decryption software for your situation
No decryption software is available in the public.
DO NOT RESET OR SHUTDOWN - files may be damaged.
DO NOT RENAME OR MOVE the encrypted and readme files.
DO NOT DELETE readme files.
This may lead to the impossibility of recovery of the certain files.
To get info (decrypt your files) contact us at
MelisaPeterman@protonmail.com
or
MelisaPeterman@tutanota.com
BTC wallet:
14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk
Ryuk
No system is safe

Second version of RYUK ransom note:

Your network has been penetrated.
All files on each host in the network have been encrypted with a strong algorithm.
Backups were either encrypted
Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover.
We exclusively have decryption software for your situation.
More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder.
No decryption software is available in the public.
Antiviruse companies, researchers, IT specialists, and no other persons cant help you encrypt the data.
DO NOT RESET OR SHUTDOWN - files may be damaged.
DO NOT DELETE readme files.
To confirm our honest intentions.Send 2 different random files and you will get it decrypted.
It can be from different computers on your network to be sure that one key decrypts everything.
2 files we unlock for free
To get info (decrypt your files) contact us at
CharlstonParkwji@protonmail.com
or
Huntingdonu@tutanota.com
You will receive btc address for payment in the reply letter
Ryuk
No system is safe

Third version of RYUK ransom note:

Your network has been penetrated.
All files on each host in the network have been encrypted with a strong algorithm.
Backups were either encrypted or deleted or backup disks were formatted.
Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover.
We exclusively have decryption software for your situation
No decryption software is available in the public.
DO NOT RESET OR SHUTDOWN - files may be damaged.
DO NOT RENAME OR MOVE the encrypted and readme files.
DO NOT DELETE readme files.
This may lead to the impossibility of recovery of the certain files.
To get info (decrypt your files) contact us at
WayneEvenson@protonmail.com
or
WayneEvenson@tutanota.com
BTC wallet:
14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk
Ryuk
No system is safe

Hackers demand 15-50 BTC for decryption, which is great amount. RYUK Ransomware does not bypass UAC, requires permission to run, which means user granted access to the computer for virus executable file. Ransomware encrypts all files except ones in following folders: “Windows”, “Mozilla”, “Chrome”, “RecycleBin”, “Ahnlab”. Before the onset of destructive activity, malware stops more than 180 services and 40 processes, by using taskkill and net stop commands. Stopped services and processes mainly belong to antivirus software, running databases, software for backup and editing documents that can prevent file encryption. RYUK also tries to encrypt network resources. The name of the network resource found is added via a semicolon to the list, which will later be used to encrypt these network resources. At the end of encryption, Ryuk destroys its encryption key and launches a BAT file that will remove shadow copies and various backup files from the disk. Use this guide to remove RYUK Ransomware and decrypt affected files.

How RYUK Ransomware infected your PC

Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged and infected installers. Virus assigns certain ID with the victims, that is used to name those files and supposedly to send decryption key. In order to prevent infection with this type of threats in future we recommend you to use SpyHunter and BitDefender Anti-Ransomware.

Download RYUK Ransomware Removal Tool

Download Removal Tool

To remove RYUK Ransomware completely we recommend you to use WiperSoft AntiSpyware from WiperSoft. It detects and removes all files, folders and registry keys of RYUK Ransomware.

How to remove RYUK Ransomware manually

It is not recommended to remove RYUK Ransomware manually, for safer solution use Removal Tools instead.

RYUK Ransomware files:

RyukReadMe.txt
UNIQUE_ID_DO_NOT_REMOVE
PUBLIC
sys
window.bat
kIUAm.exe

RYUK Ransomware registry keys:

no information

How to decrypt and restore .RYK or .rcrypted files

Use automated decryptors

kaspersky dharma ransomware decryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt .RYK or .rcrypted files. Download it here:

Download Kaspersky RakhniDecryptor

There is no purpose to pay the ransom, because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

If you are infected with RYUK Ransomware and removed it from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Phoenix Data Recovery Pro to restore .RYK or .rcrypted files

  1. Download Stellar Phoenix Data Recovery Pro.
  2. Select location to scan for lost files and click Scan button.
  3. Wait until Quick and Deep scans finish.
  4. Preview found files and restore them.

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses like RYUK Ransomware in future

1. Get special anti-ransomware software

Use Bitdefender Anti-Ransomware

bitdefender anti-ransomware

Famous antivirus vendor BitDefender released free tool, that will help you with active anti-ransomware protection, as additional shield to your current protection. It will not conflict with bigger security applications. If you are searching complete internet security solution consider upgrading to full version of BitDefender Internet Security 2018.

Download BitDefender Anti-Ransomware

2. Back up your files

onedrive backup

Regardless of success of protection against ransomware threats, you can save your files using simple online backup. Cloud services are quite fast and cheap nowadays. There is more sense using online backup, than creating physical drives, that can get infected and encrypted when connected to PC or get damaged from dropping or hitting. Windows 10 and 8/8.1 users can find pre-installed OneDrive backup solution from Microsoft. It is actually one of the best backup services on the market, and has reasonable pricing plans. Users of earlier versions can get acquainted with it here. Make sure to backup and sync most important files and folders in OneDrive.

3. Do not open spam e-mails and protect your mailbox

spamfighter

Malicious attachments to spam or phishing e-mails is most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is SpamFighter. It works with various desktop applications, and provides very high level of anti-spam protection.

Download SPAMFighter 4.75/5 (4)

Please rate this

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