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Remove Thunder ransomware (Removal Guide) - Improved Instructions

removal by Gabriel E. Hall - - | Type: Ransomware

Thunder ransomware – a hazardous computer virus which ads the .[].thunder appendix to each affected file

Thunder ransomware

Thunder ransomware is a cryptovirus which was discovered in July 2018. It is related to infamous Everbe ransomware. This file-encrypting virus infiltrates the system via spam and then starts scanning it for target files that could be encrypted. Encrypted data is marked with the .[].thunder appendix and cannot be used. After that, a ransom text note called “!=How_recovery_files=!.txt” is displayed on the victim's desktop. This message aims to announce the encryption and urges its victims to contact cybercrooks by using The main aim of cyber criminals is to convince users to pay for a decryption key. 

Name Thunder
Type Ransomware
Related to Everbe ransomware
Extension .[].thunder
Cybercriminal's provided email
Ransom note name !=How_recovery_files=!.txt
Ransom type Can vary. Needs to be paid in cryptocurrency
The algorithm used AES cipher
Elimination process Install Reimage Reimage Cleaner Intego for deletion

The Thunder ransomware ransom message looks like this:

'Hello, dear friend!
Your files are NOT damaged! Your files are modified only. This modification is reversible. The only 1 way to decrypt your files is to receive the decryption program.
To receive the decryption program write on our e-mail:
And in subject write your ID: ID-[redacted 6 hex]
We send you full instruction how to decrypt all your files.
Free decryption as guarantee. We guarantee the receipt of the decryption program after payment. To believe, you can give us up to 3 files that we decrypt for free. Files should not be important to you! (databases, backups, large excel sheets, etc.)'

The price of the ransom might vary. However, it typically needs to be paid in a given type of cryptocurrency. Transfers for decryption tools remain secret and cannot be tracked down. However, no matter how tempting the recovery of your locked files seems, avoid contacting the cybercrooks! Moreover, do NOT pay the demanded ransom as there is a big risk of being scammed. Better perform the Thunder ransomware removal as soon as you spot files marked with .[].thunder extension.

Thunder ransomware uses an AES cipher[1] to lock up important files. It can affect such data:

  • Images;
  • Video files;
  • Audio files;
  • Databases;
  • Computer networks;
  • Servers;
  • etc.

All decryption keys are out of reach for regular users. According to malware researchers, even the most experienced IT specialists cannot decrypt files encrypted by this ransomware.

Nevertheless, keeping such a virus on the system might lead you to other malware forms.[2] Various harmful programs might find it easier to enter your infected computer, so make sure you don't waste your time after finding yourself affected by a cryptovirus. To avoid such unwanted consequences, you need to remove Thunder ransomware from your PC system as quickly as possible. For such case, we suggest using anti-malware help. Install Reimage Reimage Cleaner Intego or Malwarebytes and run a full system scan.

The main issue caused by Thunder ransomware and other familiar cryptoviruses is a data loss. To prevent the loss of important photos, videos or even art, we recommend storing copies of your important data on external devices, such as a USB drive, external drive or iCloud. If kept in that kind of way, files will remain safe, and you will avoid their corruption.

Thunder virusThunder ransomware - a file-encrypting virus which locks up files and demands a ransom. Prevent ransomware-type infections

According to IT researchers[3], ransomware is often distributed through phishing emails. Spam messages are set up using misleading techniques, such as trustworthy-looking subject lines, titles, and filenames. However, no matter how safe it seems, be careful with such content, especially if you are not expecting anything significant. If you have even the slightest doubt about the message, either contact the sender to make sure that it is safe or delete this email without taking too long.

Furthermore, some dubious sites and networks might also be used for spreading malware. They might be filled with malicious ads, links or similar harmful content. If you ever encounter a suspicious-looking page, make sure to leave it immediately.

A piece of advice would be to install antivirus protection. According to specialists, every computer should be secured with an antivirus program. All you need to do is make sure that the tool is always updated.

Get rid of Thunder ransomware from your computer system

To remove Thunder virus from your PC system, you need to run an anti-malware tool. Try using antivirus programs such as Reimage Reimage Cleaner Intego or Malwarebytes. Note that you shouldn't try eliminating the threat by yourself as professional and experienced help is needed for this kind of virus.

After you carry out the Thunder ransomware removal, be sure to do some computer system backups to protect yourself in the future. You need to restart your system and run yet another scan to make sure that the virus was deleted successfully. 

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Compatible with Microsoft Windows Supported versions Compatible with OS X Supported versions
What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Reimage, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

To remove Thunder virus, follow these steps:

Remove Thunder using Safe Mode with Networking

Use Safe Mode with Networking to stop the virus:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Thunder

    Log in to your infected account and start the browser. Download Reimage Reimage Cleaner Intego or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Thunder removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Thunder using System Restore

Turn on the System Restore function to disable Thunder ransomware and run a full system scan:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Thunder. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage Reimage Cleaner Intego and make sure that Thunder removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Thunder from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by security experts.

If you spotted encrypted files, you might be wondering, how to recover them. Here are some tools that might be useful for such a purpose. However, make sure you remove malicious files at first.

If your files are encrypted by Thunder, you can use several methods to restore them:

Try using Data Recovery Pro to get your files back

If used as required, this method might help you recover data, that was corrupted or deleted.

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Thunder ransomware;
  • Restore them.

Use Windows Previous Versions feature to recover some of your files

Notice that such feature will work only if the System Restore function was activated before infiltration of this malware.

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

Consider using Shadow Explorer for restoring files encrypted by Thunder ransomware

If you want to recover some files, try using this method. However, it works only for those files which did not lose their Shadow Copies during the cyber attack.

  • Download Shadow Explorer (;
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

There is no official Thunder ransomware decryptor discovered yet.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Thunder and other ransomwares, use a reputable anti-spyware, such as Reimage Reimage Cleaner Intego, SpyHunter 5Combo Cleaner or Malwarebytes

Do not let government spy on you

The government has many issues in regards to tracking users' data and spying on citizens, so you should take this into consideration and learn more about shady information gathering practices. Avoid any unwanted government tracking or spying by going totally anonymous on the internet. 

You can choose a different location when you go online and access any material you want without particular content restrictions. You can easily enjoy internet connection without any risks of being hacked by using Private Internet Access VPN.

Control the information that can be accessed by government any other unwanted party and surf online without being spied on. Even if you are not involved in illegal activities or trust your selection of services, platforms, be suspicious for your own security and take precautionary measures by using the VPN service.

Backup files for the later use, in case of the malware attack

Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.

About the author
Gabriel E. Hall
Gabriel E. Hall - Passionate web researcher

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