Remove RT4BLOCK malware from your computer

Also Known As: RT4BLOCK virus
Distribution: Low
Damage level: Severe

RT4BLOCK ransomware removal instructions

What is RT4BLOCK?

RT4BLOCK is high-risk malware categorized as ransomware. Typically, programs of this type block access to data (encrypt files) and keep them locked unless a ransom is paid. RT4BLOCK is a part of the RotorCrypt ransomware family and was discovered by Michael Gillespie. It changes filenames of encrypted files by adding the "!-information-...___ ingibitor366 ___....RT4BLOCK" string. For example, "1.jpg" is renamed to "1.jpg!-information-...___ ___....RT4BLOCK". Like most ransomware-type programs, RT4BLOCK creates a ransom message within a text file, in this case called "NEWS_INGiBiToR.txt".

The "NEWS_INGiBiToR.txt" file contains a note stating that all data is locked and that victims must contact RT4BLOCK's developers via the email address immediately, otherwise they will lose their files. It is also stated that any attempts to decrypt files with third party tools (manually) will damage all files permanently. Victims are given 15 days to contact the cyber criminals who developed this ransomware - after this period, all data is deleted. Generally, only ransomware developers have the tools or keys that can decrypt encoded files. Despite this, you are advised not to trust them: victims often do not receive decryption tools/keys, even if they transfer ransom payments (usually, via a cryptocurrency). As there is no free tool capable of decrypting files encoded with RT4BLOCK, the best option is to recover files from a backup (if one was created prior to encryption and it has not been encrypted together with the remaining data).

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

RT4BLOCK decrypt instructions

RT4BLOCK is similar to Ntuseg, Acuf2, UNNAMED, and other ransomware-type malware. Typically, these programs lock/encrypt files and display ransom messages. Two main differences are size of ransom and cryptography algorithm (symmetric or asymmetric) that is used to encrypt files. Locked files cannot be decrypted without the correct tool and the involvement of the cyber criminals who designed the ransomware. To prevent data and financial loss, have your data backed up and store it on remote server or unplugged device.

How did ransomware infect my computer?

Typically, malicious programs such as RT4BLOCK are proliferated via emails (spam campaigns), untrustworthy download sources, fake software update tools, trojans and other tools that supposedly bypass paid software activation ('cracks'). Cyber criminals employ spam campaigns to proliferate viruses by sending malicious attachments via email. They send emails that include infected Microsoft Office documents, archive files, PDF files, executables, JavaScript files, and so on, and hope that people open them. These attachments and links then download and install malware. Untrustworthy third party software download sources such as Peer-to-Peer networks (torrent clients, eMule, etc.), free file hosting, freeware download websites and other similar channels often contain malicious files. Downloading and opening these malicious files (disguised as harmless, regular files) infects systems. Fake software update tools cause damage when they download and install malware or exploit bugs/flaws of software already installed on the operating system. A trojan is a type of malware designed to cause chain infections - if installed, trojans cause download and installation of other malware. Software 'cracking' tools are used to activate paid programs free of charge, however, the developers are often cyber criminals who seek to proliferate malicious programs such as ransomware.

Threat Summary:
Name RT4BLOCK virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .RT4BLOCK
Ransom Demanding Message NEWS_INGiBiToR.txt
Cyber Criminal Contact
Detection Names Avast (Win32:Heim), BitDefender (DeepScan:Generic.Ransom.RotorCrypt.5DB20168), ESET-NOD32 (A Variant Of Win32/Filecoder.RotoCrypt.C), Kaspersky (HEUR:Trojan.Win32.Generic), Full List Of Detections (VirusTotal)
Rogue Process Name wlnlogon n.exe
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads, fake updaters, unofficial activation tools.
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.

To eliminate RT4BLOCK 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?

To prevent computer infection with ransomware-type and other malicious programs, do not open email attachments or links received from unknown, untrustworthy, or suspicious addresses. Update installed programs via implemented functions or tools provided by official developers. Do not download software from untrustworthy, unofficial websites or using third party downloaders. The safest way to download is using official web pages and direct download links. Activate software with official tools, since 'cracking' tools often cause computer infections and are illegal. Finally, have reputable anti-spyware or anti-virus software installed and enabled at all times. If your computer is already infected with RT4BLOCK, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in RT4BLOCK ransomware text file ("NEWS_INGiBiToR.txt"):

We want to give you important information.
Your files are fine, but they are in a locked state.
time is limited, long waiting is fraught with data loss, we recommend contacting by email immediately
attached to the file name and in this text document.

Please note!!!!!!!!!!!!!
In case of attempts to restore files by third-party programs, your files will be damaged forever!
Your computer has a unique code, if this code is damaged, you will also lose all your files!
We have the right to detect attempts to restore files manually, destroy code and files irrevocably,
as well as analytical data of your company will be transferred to experts for further action!

In case of cooperation with us, we will return all your files to their original state, as well as get information on
your server protection and analytical data will be removed from our database.

Primary mail for communication:

___________15 days to reply, after a while the data will be erased____________

Screenshot of files encrypted by RT4BLOCK (".RT4BLOCK" extension):

Files encrypted by RT4BLOCK

RT4BLOCK malicious process in Task Manager ("wlnlogon n.exe"):

RT4BLOCK ransomware malicious process

RT4BLOCK ransomware removal:

Instant automatic removal of RT4BLOCK 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 RT4BLOCK 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 RT4BLOCK 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 RT4BLOCK 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 RT4BLOCK 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 RT4BLOCK 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 RT4BLOCK, 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 RT4BLOCK 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 RT4BLOCK ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

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Removal Instructions in other languages
Malware activity

Global virus and spyware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
RT4BLOCK virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of RT4BLOCK virus on your mobile device.
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Platform: Windows

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