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.crab virus. How to remove? (Uninstall guide)

removal by Linas Kiguolis - - | Type: Ransomware

.crab virus is a dangerous cryptovirus from an infamous GandCrab ransomware family  

.crab rasnsomware
.crab virus is a ransomware developed by money-extortionists

.crab virus — ransomware that has been locking files, dropping this file extension to their name and additionally demanding $800 ransom in exchange for the special key needed for data decryption. This ransomware is one of the numerous variants hailing from GandCrab family where other members are:

Questions about .crab virus

The family of this malware[1] showed up in January this year, and now, after a few months, there are already four different versions attacking unaware PC users. The .crab file virus can also drop .KRAB file extension to encrypted files to make them useless. To get into target computers, ransomware is using sophisticated techniques, including Rig ExploitKit, Grandsoft RigExpoit, and others. As usual, ransomware uses AES and RSA encryption algorithms. Immediately after that, data becomes useless.

Name crab virus
Type Ransomware
Family GandCrab
Ransom amount $800 in Bitcoin, DASH
Extension .crab file extension, .KRAB file extension
Ransom note CRAB-DECRYPT.txt; KRAB-DECRYPT.txt.
Versions GandCrab; GandCrab 2; GandCrab 3; GandCrab 4
Main dangers Files' encryption can lead victims to the permanent data loss
Distribution Numerous spam campaigns launched with the help Rig ExploitKit, Grandsoft RigExpoit, etc.
Elimination You should use Reimage for virus removal

Currently, it is known that .KRAB virus is using two types of ransom notes: CRAB-DECRYPT.txt and KRAB-DECRYPT.txt. These documents are typically saved on every folder on victim's PC and are used to note him or about the attack. As usual for the GandCrab ransomware, this provides different information, such as instructions on how to connect to TOR network, information about buying Bitcoin cryptocurrency, making the payment and testing the decryption service. However, we must warn you that the decryption key that virus developers have been promoting might not even exist. The only safe way to restore files is backups. However, you can also try data recovery methods that we provided at the end of this guide.

Typically, .crab virus or any other its version displays such ransom note: 

All your files, documents, photos, databases and other important files are encrypted and have the extension: .KRAB
The only method of recovering files is to purchase an unique private key. Only we can give you this key and only we can recover your files.
The server with your key is in a closed network TOR. You can get there by the following ways:
| 0. Download Tor browser –
| 1. Install Tor browser
| 2. Open Tor Browser
| 3. Open link 
| 4. Follow the instructions on this page

This ransomware is demanding an 800 dollar amount which must be paid in the form of Bitcoin or DASH. This amount of money should be enough to buy a unique decryption key which should be entered into the specific field to recover locked files. However, we do not recommend contacting these cybercriminals to pay the ransom. These people are scammers and paying the money might lead you to additional problems. 

According to malware's developers, this is the only way to recover files locked by .KRAB extension:

You should buy GandCrab Decryptor. This software will help you to decrypt all of your encrypted files and remove GandCrab Ransomware from your PC.
Current price: $800.00. As payment, you need cryptocurrency DASH or Bitcoin

Instead of the proposed process, you should remove .crab virus, and recover your computer to its previous state. Keep in mind that you cannot know what else could this malware initiate on your machine. The more time this threat will spend on your computer, the more damage it could cause. 

.crab virus removal requires professional help, so employ anti-malware tools like Reimage. Perform a full system scan to ensure that tool detects and deletes all ransomware-related threats. We highly recommend using only certified programs for this procedure to be sure that your computer is running smoothly as prior to the appearance of this malware. 

Ransomware attacks are initiated because of careless users' behavior

Not paying enough attention while browsing the Internet can lead you to various PC infections and malware attacks. While ransomware viruses are mostly spread via spam emails and their insecure attachments, you should also be very careful while downloading programs from p2p networks[2] or other suspicious providers.

If you happen to get any suspicious email, make sure you double check it before opening. If you can find anything suspicious, delete it immediately!

Typically, fake email messages are claiming something like that: 

Dear Customer,

Please find the attachment regarding your delivery!
Kind regards

FedEx Support

 To make sure that the email message is safe, you need to look at these components:

  • email address. It has to make sense when compared with the company's name and email's content;
  • the name of the company. You have to be related to the company somehow (be the employee, user, customer, etc.);
  • grammar and typo. Check the email for accuracy, it shouldn't contain any mistakes;
  • Researchers[3] also recommend looking closely at programs they are downloading to their computers from P2P networks. Please, stay away from illegal software, games and similar apps as they can also be filled with malicious installers.

Terminate .crab virus as soon as possible 

To remove .crab virus properly, you need to use anti-malware tools that could help you find malware and its components without wasting the precious time. Choosing these tools wisely will ensure the full elimination of the virus and further system's protection. Ransomware is one of the most dangerous cyber threats, so we highly recommend using programs like Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware.

However, .crab virus removal won't recover your locked files. These two processes are not related, so you will need to forget about your encrypted files at first, no matter how hard it may seem. Files' recovery can be initiated only on the secure system. If you took care of Krab ransomware virus already, move to our Data Recovery section. 

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall .crab virus. 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.
More information about this program can be found in Reimage review.
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To remove .crab virus, follow these steps:

Remove .crab using Safe Mode with Networking

When dealing with ransomware, you need to disable it first. Disable KRAB files virus by rebooting your system 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 .crab

    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 .crab removal.

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

Remove .crab using System Restore

System restore feature can also be helpful when you need to launch anti-virus for ransomware removal:

  • 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 .crab. 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 .crab removal is performed successfully.

Bonus: Recover your data

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

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

Data Recovery Pro is designed for restoring encrypted files

Data Recovery Tool – an exceptional program that can help you recover accidentally deleted files. Use it by following these steps:

Windows Previous Versions feature can recover your most important files

If you want to restore individual files you can use Windows Previous Versions feature, but make sure that System Restore was enabled before the attack:

  • 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 can recover .crab virus locked files

If ransomware left Shadow Volume copies untouched you could restore your data using ShadowExplorer:

  • 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.

Decryption tool for .crab virus is not available

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from .crab and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Linas Kiguolis
Linas Kiguolis - Expert in social media

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