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Coban ransomware virus. How to remove? (Uninstall guide)

removal by Linas Kiguolis - - | Type: Ransomware

Coban encrypts files “due to vulnerability in the system”

Picture of Coban ransomware virus attack

Coban is a recently file-encrypting virus that might be a new version of CryptoMix ransomware. The virus is still under investigation and these assumptions are not confirmed yet. However, it’s already known that malware locks files on the targeted computer with .coban file extension and demands Bitcoins[1] in exchange for decryption key.

The Coban virus uses a sophisticated encryption and encrypts the most popular file types to make ransomware attack more damaging to the victim. Following data encryption, crypto-virus delivers a ransom note in “_HELP_INSTRUCTION.txt” file where cyber criminals tell victims unpleasant news:

All your files are already encrypted due to a vulnerability in the system!
For decoding it is necessary to pay ransom by bitcoins.
Bitcoins can be bought here – in many ways.
Write to us at mail and tell us your unique ID in the subject line. DECRYPT-ID-XXX number

The success of Coban ransomware is questionable because criminals use AOL email to communicate with the victims. There’s no doubt that AOL will quickly notice suspicious activities of the user who owns email address. Once the email is blocked, hackers will no longer be able to tell how much Bitcoins victims have to pay.

However, trying to contact cyber criminals and paying the ransom is never recommended. It might end up with money loss. The purpose of all ransomware-type viruses is to swindle the money from computer users. Data recovery becomes only the matter of criminals’ conscience. We always want to discourage victims of ransomware to test their luck and sponsor illegal ransomware projects. Thus, you should remove Coban without any delay.

Ransomware elimination is not a simple task. This type of cyber threat can modify Windows system, create or alter Registry and install numerous malicious components. For this reason, you should remove Coban using reputable malware removal software like Reimage. This security tool can quickly locate and uninstall dangerous content from the affected device.

Methods used to spread malicious programs

Coban is executed from the cc9b1e6806db5fb9628559162c3ebb62.virus file. This malicious file spreads or lurks on the Web obfuscated. It might pretend to be an important email attachment, useful program or crucial update. Therefore, users are advised to stay vigilant and back up important data.[2]

The most common way for ransomware to get inside the system is malicious spam emails. Crooks might craft emails that look like sent from banks, governmental institutions or other popular companies. Therefore, it’s easy to get tricked and open a dangerous file. For this reason, you have to get used to double-check the information before opening any content in the email.

Additionally, ransomware might hide under suspicious ads, illegal downloads or bogus software updates. Security experts from UtanVirus[3] warn to stay away from doubtful content and set automatic software updates to minimize the risk of the attack.

Termination of the Coban ransomware virus

The only way to remove Coban without causing damage to the system is to use reputable antivirus or malware removal software. If you are not sure what tools to use, choose one of our suggestions: Reimage, Malwarebytes or Plumbytes Anti-MalwareNorton Internet Security.

Ransomware can block the installation of security software or prevent from running a full system scan. Though, to avoid this situation and perform automatic Coban removal, you should reboot the computer to the Safe Mode with Network or use System Restore method. Both ways to disable the virus are presented below.

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To remove Coban virus, follow these steps:

Remove Coban using Safe Mode with Networking

Malware might block access to security software and prevent for automatic elimination. However, you can disable the virus by rebooting computer to the 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 Coban

    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 Coban removal.

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

Remove Coban using System Restore

If the previous method did not help, you can try System Restore:

  • 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 Coban. 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 Coban removal is performed successfully.

Bonus: Recover your data

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

Researchers haven't created a decryption software that will help to recover all files encrypted by Coban ransomware. However, if you do not have backups, you should try alternative ways to restore data and hope that the most important files will be rescued.

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

Data Recovery Pro might help to restore data

Originally Data Recovery Pro is designed to restore files that are accidentally deleted or corrupted after system wreckage. However, some users found that this tool also helps to restore files encrypted by ransomware viruses.

  • 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 Coban ransomware;
  • Restore them.

Take advantage of Windows Previous Versions feature

Windows allows traveling back in computer's time and accessing previously saved versions of the files. This feature only works if System Restore has been enabled before the Coban attack. Besides, you can only restore individual copies of the files.

  • 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”.

ShadowExplorer might help to restore files encrypted by Coban ransomware

If the virus fails to delete Shadow Volume Copies of the targeted files, you should definitely use ShadowExplorer and restore your files:

  • 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.

Coban decryptor is not available yet.

About the author

Linas Kiguolis
Linas Kiguolis - Expert in social media

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