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Gedantar ransomware. How to remove? (Uninstall guide)

removal by Julie Splinters - - | Type: Ransomware

Gedantar – a new version of Unlock92 ransomware

Gedantar ransomware drops a ransom note

Gedantar is a ransomware[1] virus that is an updated version of the Unlock92 virus. Malware spreads via malicious spam emails and is executed from Gedantar.exe file. Then it starts data encryption using RSA-2048[2] cryptography and renames files using this pattern: <filename>_<8-rand-chars>.<ext>.

Summary
Name Gedantar
Type Ransomware
Danger level High. Makes system changes and encrypts files
Cryptography RSA-2048
File extension <filename>_<8-rand-chars>.<ext>
Ransom note  <20-rand-chars>.jpg
Distribution methods Malspam, malvertising, bogus software updates and downloads
To uninstallGedantar, install Reimage and run a full system scan

Gedantar ransomware aims at popular files in order to make more damage to the users. Hence, after the malware attack, Microsoft Office documents, audio, video or image files, archives, and databases are corrupted.

Following data encryption, malware drops a ransom note called <20-rand-chars>.jpg where cyber criminals ask to send an email to unlckr@protonmail.com or contact them via TOR network if they won’t respond in 24 hours time. The ransom note is written in Russian language, so it is expected to target Russian-speaking computer users[3] the most.

Additionally, Gedantar virus changes affected computer’s desktop where authors of malware deliver the same threatening message:

Ваши файльi были зашифрованы с помощью алгоритма Г5А-2048 Если вы хотите их вернуть то отправьте один из зашифрованных файлов на е-mai1: unIckr@protonmail.com
Если вы не получили ответ в течение суток то скачайте с сайта л.огрго]ес.согл браузер ТОК и с его помощью зайдите на сайт http://n3r2kuzhw2h7x6j5.onion – там будет указан действующий и почтовый ящик.
Попытки самостоятельного восстановления файлов могут безвозвратно их испортить!

However, security specialists do not recommend following the instructions and having business with cybercriminals. They will demand to pay a ransom in cryptocurrency in order to get access to the files. But transferring the money does not guarantee that you will be allowed to decrypt files.


Criminals might threaten into paying more money by telling to delete data, or they might disappear as soon as your payment is transferred to their virtual wallet. Instead of that, you should remove Gedantar from the computer with reputable anti-malware software, like Reimage.

We want to discourage you from manual Gedantar removal which might end up with even bigger failure. Ransomware is a complex cyber threat that contains a bunch of malicious files. Additionally, it might affect legit system processes and fixing this damage without professional tools is nearly impossible.

However, in some cases ransomware might prevent installation of security software or block attempts to run it. However, Gedantar can be disabled as well as any other file-encrypting virus. To run automatic elimination, you need to reboot the system to Safe Mode with Networking.

Strategies used for ransomware delivery and installation

Ransomware-type cyber threats typically spread via malicious spam emails that include an obfuscated attachment. As soon as a user is tricked to open Word, PDF or ZIP file, malware payload is downloaded and executed on the computer. Therefore, it’s important to check the credibility of each received email before opening an attached file.

Furthermore, ransomware can sneak into the device after clicking on a malicious ad, downloading bogus software or its update. However, in some cases, malware does not require user’s participation and can sneak into the system with the help of exploit kits.

Hence, to avoid infiltration of crypto-malware, you should not only be careful with your clicks and downloads but keep your programs and operating system updated too. Finally, obtaining reputable antivirus and creating backups are important ransomware precautions as well.

Delete Gedantar ransomware virus and try to recover data

Gedantar removal requires rebooting the system to Safe Mode with Networking, downloading malware removal software and running a full system scan. We suggest using one of these tools for virus elimination: Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes.

As we have mentioned in the beginning, the virus might be capable of blocking security software to stay longer on the machine. However, if you follow our prepared instructions below, you will be able to get rid of the virus easily.

As soon as you remove Gedantar from the machine, you can use backups or try alternative recovery methods. However, third-party tools might not be as effective as you would expect. Though, you should still try them out.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Malwarebytes.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove Gedantar virus, follow these steps:

Remove Gedantar using Safe Mode with Networking

Follow these steps to reboot the computer to Safe Mode with Networking:

  • 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 Gedantar

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

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

Remove Gedantar using System Restore

This method might also help to disable Gedantar ransomware and remove it with anti-malware software:

  • 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 Gedantar. 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 and make sure that Gedantar removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Gedantar from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

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

Try Data Recovery Pro to restore files affected by ransomware

This tool helps to restore corrupted system files, so it can be useful after ransomware attack too:

  • 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 Gedantar ransomware;
  • Restore them.

Take advantage of Windows Previous Versions feature

If System Restore was enabled before ransomware attack, you can recover individual files by following these steps:

  • 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”.

Use ShadowExplorer

If malware did not delete Shadow Volume Copies, you can take advantage of ShadowExplorer:

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • 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.

Gedantar Decryptor is not available

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Gedantar and other ransomwares, use a reputable anti-spyware, such as Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes

About the author

Julie Splinters
Julie Splinters - Malware removal specialist

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References