RYK Ransomware

Also Known As: RYK virus
Distribution: Moderate
Damage level: Severe

RYK ransomware removal instructions

What is RYK?

There are many ransomware-type computer infections available online, including RYK, which was discovered by MalwareHunterTeam. This is a new variant of RYUK Ransomware. RYK encrypts data using a cryptography algorithm, thereby rendering files stored on a computer unusable. It appends the ".RYK" extension to each encrypted file, thus renaming all affected files. For example, "1.jpg" becomes "1.jpg.RYK". RYK also places a "RyukReadMe.txt" text file (ransom-demand message) in every folder that contains encrypted files.

The ransom message within "RyukReadMe.txt" is from RYK developers who inform victims that all data has been encrypted using a strong cryptography algorithm, however, the type of algorithm used (symmetric or asymmetric) is not specified. They state that encrypted backups and shadow copies have also been encrypted and that using the F8 key (and other methods) will not help and might even do more damage (this function key is often used to enter the Windows startup menu while booting the Windows Operating System and can also be used to access Windows recovery system). RYK developers also state that only they can provide victims with a decryption tool, and no other tools are capable of decryption. In summary, they make it clear that no other party can help those with computers infected with RYK. These cyber criminals also warn users that shutting down or restarting a computer might cause damage or data loss. They urge people not to delete or rename the "RyukReadMe.txt" text files. RYK developers offer free decryption of two files to prove decryption is possible and in an attempt to give the impression that they can be trusted. To decrypt the remaining data, users must contact them via the charlstonparkwji@protonmail.com or huntingdonu@tutanota.com email address. Once contacted, they will send a Bitcoin wallet address for the ransom payment (to be made in a cryptocurrency). Do not contact RYK developers under any circumstances. They use cryptographies that generate unique decryption keys (and store them on remote servers controlled only by them). In this way, they can blackmail victims, since there are no other (free) tools capable of cracking RYK ransomware encryption. Note that cyber criminals usually ignore victims even if their ransom demands are met. The best solution in these cases is to use an existing backup and restore files from there.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

RYK decrypt instructions

There are many ransomware-type viruses online, such as Forma, Doubleoffset, and Gerber. All infections of this type are very similar and serve the same purpose: to encrypt data and keep it in that state until ransom demands are met. The main differences are ransom size (cost of decryption) and cryptography algorithm used to encrypt data. Decryption without the involvement of ransomware developers is usually impossible, unless their program is not fully developed, contains bugs/flaws or other important deficiencies. Therefore, maintain regular backups and keep them stored on remote servers or unplugged storage devices.

How did ransomware infect my computer?

It is not known exactly how cyber criminals promote RYK ransomware, however, in most cases, infections of this type are distributed through spam campaigns, trojans, fake software updaters, and other untrustworthy software download sources. Spam campaigns are used to proliferate these infections by employing emails that contain malicious attachments. These can be Microsoft Office documents, PDFs, archive files, executables, and so on. By opening these attachments, people are often tricked into downloading and installing computer infections, including ransomware. Trojans are computer infections (malicious programs) that are used to proliferate other infections (if installed, they cause chain infections). Untrustworthy software download sources such as peer-to-peer networks (eMule, torrents, and so on) usually present malicious files (often executables) as legitimate files. Freeware download websites, file hosting websites and other similar software download sources are also used to proliferate viruses. Using these untrustworthy sources, cyber criminals trick people into downloading and installing malicious programs. Another common way to proliferate these viruses is using fake software updaters - They infect systems by exploiting bugs/flaws of installed (outdated) software or downloading and installing malicious programs rather than the updates, fixes, etc.

Threat Summary:
Name RYK virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .RYK
Ransom Demanding Message RyukReadMe.txt, RyukReadMe.html files
Cyber Criminal Contact annarummowellington91@protonmail.com, boganyrosina@protonmail.com, charlstonparkwji@protonmail.com, cilibertogeorgiana1992@protonmail.com, dejackomeajna@protonmail.com, devinocandence96@protonmail.com, elmersvictoria@tutanota.com, huntingdonu@tutanota.com, lakelynnmaske@protonmail.com, naborbrice1990@protonmail.com (emails depend on RYK's variant)
Detection Names (raEMQ.exe)
Avast (Win64:RansomX-gen [Ransom]), BitDefender (Generic.Ransom.Ryuk2.84BB3536), ESET-NOD32 (a variant of Win64/Filecoder.Z), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)
Symptoms Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection.
Removal

To eliminate RYK virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

The key to computer safety is caution. To prevent computers infection, browse the web, download, install and update software with care. Do not open attachments or web links that are presented in emails received from unknown/unidentified/suspicious email addresses. If an email does not relate to you, ignore it. Do not use third party downloaders, installers or other such tools to download or install software. These are often used to proliferate rogue apps or other unwanted software (potentially, malicious). Never use unofficial tools to update installed software (or the operating system). This might lead to installation of unwanted software or even high-risk computer infections. The best way to keep your software up-to-date is to update it using tools and/or functions that are provided by official developers only. Reputable anti-virus/anti-spyware software can prevent computer infections, and we recommend that you have this software installed and active. If your computer is already infected with RYK, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in RYK ransomware text file :

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, annarummoWellington91@protonmail.com
or
Huntingdonu@tutanota.com, LakelynnMaske@protonmail.com

You will receive btc address for payment in the reply letter

Ryuk

No system is safe

Screenshot of files encrypted by RYK (".RYK" extension):

Files encrypted by RYK

Update January 23, 2019 - RYK's developers have released another variant of this ransomware which also known as Cryptor 2.0. This variant generates a differently named text file ("ReadMe.txt") and provides different email addresses. The ransom-demanding message and file extension remain the same.

Screenshot of updated RYK's variant (Cryptor 2.0) text file:

RYK Ransomware update Cryptor 2.0

Text presented within this file:

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
DejackomeAjna@protonmail.com
or
ElmersVictoria@tutanota.com

You will receive btc address for payment in the reply letter

Ryuk

No system is safe

Another variant of the ransom demanding message created by RYK ransomware - RyukReadMe.txt:

ryk ransomware note variant 3 (RyukReadMe.txt)

Text presented in this variant:

Your network has been penetrated.
All files on each network host have been encrypted with a strong algorithm.
Backups were encrypted too.

Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover.
Only we have exclusive decryption software, suitable for your situation.

More than a year ago, world experts recognized the impossibility of such encryption deciphering by any means except the original decoder.
No decryption software is available in the public.
Antivirus companies, researchers, IT specialists, and any other persons cannot help you to decipher the data.

Decryption takes from ten minutes up to several hours.
It is performed automatically and doesn't require from you any actions except decoder launching.

DO NOT RESET OR SHUTDOWN SYSTEM — files may be damaged.
DO NOT DELETE readme files.

To confirm our honest intentions. Send 2 different random files and you will get them back decrypted.
It can be from different computers on your network to be sure that one key decrypts everything.
We will unlock 2 files for free.
To get info (decrypt your files) contact us a
BoganyRosina@protonmail.com
or
NaborBrice1990@protonmail.com

You will receive btc address for payment in the reply letter

Ryuk
No system is safe

Another variant of a ransom-demanding message created by RYK ransomware - RyuReadMe.html:

RYK Ransomware HTML File

Text presented in this html file:

CilibertoGeorgiana1992@protonmail.com
DevinoCandence96@protonmail.com

balance of shadow universe

RYK ransomware removal:

Instant automatic removal of RYK virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of RYK virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the RYK virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the RYK ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining RYK ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of RYK are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by RYK, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as RYK ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove RYK ransomware: