TBlocker Ransomware

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

TBlocker ransomware removal instructions

What is TBlocker?

First discovered by Leo, TBlocker is a ransomware-type virus designed to encrypt a number of data types. During encryption, TBlocker appends the "_" character to the name of each compromised file. For example, "sample.jpg" is renamed to "sample.jpg_". Once files are encrypted, using them becomes impossible. After successfully encrypting files, TBlocker locks the computer screen and displays a ransom-demand message. Note that the lock screen is displayed only once - rebooting the system will remove the screenlock. Yet, the files will remain encrypted.

The message states that data has been encrypted and can only be restored using a unique key. Unfortunately, this information is accurate. Although it is currently unknown whether TBlocker uses symmetric or asymmetric cryptography, decryption requires a key generated uniquely for each victim. Cyber criminals (TBlocker's developers) store these keys on a remote server, allowing them to make ransom demands for their release. To receive their key, victim must pay a ransom of $250 in Bitcoins. It is also stated that the payment must be submitted within 24 hours after encryption. After this time, files become publicly accessible and the system is locked permanently. Despite these threats and demands, cyber criminals should never be trusted. Research shows that these people ignore victims once payments are submitted. Therefore, paying will give no positive result - users will be scammed. Therefore, never pay. Unfortunately, there are no tools capable of restoring files encrypted by TBlocker and the only solution is to restore everything from a backup.

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

TBlocker decrypt instructions

TBlocker is a regular ransomware and thus shares many similarities with Dcrtr, Twist, BlackRuby, Payerranso, and dozens of other viruses. Research shows that, although these viruses are developed by different cyber criminals, they have identical behavior - they encrypt data and make ransom demands. In most cases, ransomware-type viruses have just two major differences: 1) size of ransom, and; 2) type of encryption algorithm used. Unfortunately, many of these viruses employ algorithms that generate unique decryption keys. Therefore, restoring files manually without involvement of developers (contacting these people is not recommended) is impossible, unless the malware is still in development or has certain bugs/flaws (for example, the key is hard-coded, stored locally, or similar). Ransomware is one of the main reasons why you should keep regular data backups. Backup files must be stored on a remote server (e.g., Cloud) or an unplugged external storage. If not, the malware will encrypt them along with other regular files.

How did ransomware infect my computer?

Ransomware-type viruses are proliferated in various ways, however, the most popular five are: 1) trojans; 2) fake software update tools; 3) spam emails; 4) P2P [peer-to-peer] networks, and; 5) third party download sources. Trojans work very simply - in most cases they open "backdoors" for high-risk malware to infiltrate the system. Fake updaters infect the system by exploiting outdated software bugs/flaws or downloading malware rather than providing software updates. Spam emails often contain JavaScript files, MS Office documents or other malicious attachments that, once opened, download and install malware. P2P networks (torrents, eMule, etc.) and other unofficial download sources (free file hosting websites, freeware download websites, and so on) present malware as legitimate software. In this way, users are tricked into downloading and installing malware.

How to protect yourself from ransomware infections?

The main reasons for computer infections are poor knowledge and careless behavior. If you want to prevent ransomware infections, be very cautious when browsing the Internet. Never open attachments received from suspicious email addresses. Delete these emails immediately, without reading. We recommend that you download your applications from official sources only, using direct download links. Be aware that criminals proliferate rogue apps via third party downloaders/installers. Therefore, these tools should never be used. Keep installed applications up-to-date and use a legitimate anti-virus/anti-spyware suite, however, since ransomware is distributed using fake updaters, software should be updated using implemented functions or tools provided by the official developer. The key to computer safety is caution.

Text presented in TBlocker ransomware lock screen:

Ooooops!!
Deveice blocked by TBlocker
All your files have been encrypted with a key that we only have. If you want to retrieve the files pay by bitcoin to: 19f8a8va89v8aim2f9a the sum of $ 250. The system has been compromised, it is not possible to exit. At the expiration of time all your files will be made public on the internet, and the PC will be permanently locked! PWD BY TOM580933 (WHITE54BIT) - VISIT TOMH.IT

Screenshot of files encrypted by TBlocker ("_" extension):

Files encrypted by TBlocker

TBlocker ransomware removal:

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 TBlocker 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.


Download remover for TBlocker virus
1) Download and install   2) Run system scan   3) Enjoy your clean computer!

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 Reimage.

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 TBlocker 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 TBlocker 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 TBlocker 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 TBlocker, 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 TBlocker 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 TBlocker ransomware: