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Remove GandCrab 4.2 ransomware (Removal Guide) - Decryption Steps Included

removal by Olivia Morelli - - | Type: Ransomware

GandCrab 4.2 — yet another version of GandCrab ransomware discovered this year 

 GandCrab 4.2 ransomware

GandCrab 4.2 ransomware is the sixth version of an infamous GandCrab ransomware. Just like its previous versions which are surrounded by many speculations because of the use of exploit kits and similar functionality, GandCrab 4.2 version doesn't seem to be different. According to security researchers, the virus relies on a tool that allegedly allows potential hackers to build their own version of this ransomware.[1] If this fake builder works, it can make this virus even more dangerous. After encrypting victims' files, the virus marks them with the specific extension. Just like the previous versions of GandCrab ransomware family, the virus is still using AES-256 and RSA-2048 encryption methods. Then, it drops either .crab or .KRAB file extensions and makes users' files useless.

Name GandCrab 4.2 
Type Ransomware
Family GandCrab 
Previous versions

GandCrab 2

GanCrab v3

GandCrab v4

GandCrab v4.1

Distribution  Spam email attachments, other malware
Symptoms Locked files, limited access to the device
Elimination Use Reimage Reimage Cleaner Intego for GandCrab 4.2 ransomware removal
Decryption Some versions of Gandcrab 4 are decryptable. Use GandCrab 4.2 decryption tool(by BitDefender)

Encryption starts when ransomware scans the system and creates a file filled with the status information of the targeted device. It says if the PC is already encrypted or not. Additionally, the victim is asked to pay from $100 to $700 for the decryption key which is said to be the only one capable of recovering locked files. GandCrab 4.2 ransomware is believed to be an advanced version of its primary variant detected on January 2018.

GandCrab 4.2 ransomware is already decryptable.[2] The tool is provided in our data recovery guide. A few previous versions have been decrypted because of the mistake hackers made in virus code. However, developers fixed this hole in the second virus version and increased their chances of convincing users into paying the ransoms. 

Ransomware works silently, and you can only notice its activity when your data is locked with the corresponding file extension. Also, such viruses tend to disable the antivirus program, so virus detection can also become a seriously difficult task. This is why you should use System restore or Safe mode with networking for ransomware termination. Then, install Reimage Reimage Cleaner Intego to detect malicious files and remove them from the system.

Viruses like GandCrab 4.2 ransomware are created for the only purpose – money extortion. Since cybercriminals lock your money, they demand the special amount of ransom in cryptocurrency. The amount of the ransom is written in ransom note that is placed on your desktop as an image or a text file in every folder of your device. In this file, there should be an email address that ransomware developers suggest you use for contacting them. However, do not communicate with these criminals and do not pay the ransom because this may lead you to money loss as well.

These people are saying that they have decryption tools and they are the only ones who can recover your data. This alleged tool might not even exist. As many researchers[3] advise, you should focus on GandCrab 4.2 removal, and then think about data recovery. The best option for this is using data backups or official tool presented by BitDefender. 

If you do not have a routine of saving backups of your files to the external drives and similar solutions, it might be difficult to recover all of your files. However, we have provided a few options that could be helpful for you. Also, if you want to remove GandCrab 4.2 ransomware securely, you can follow suggestions from the instructions down below. Keep in mind that this is a dangerous virus which should be removed quickly after you notice its suspicious activity. 

GandCrab 4.2 ransomwareGandCrab 4.2 ransomware is the sixth version of GandCrab ransomware.

Ransomware comes from malicious links and email attachments 

This is a program that can easily alter your computer system without your permission or knowledge. This type of virus usually attacks your device through spam email attachments or suspicious links. This infection can also come with the help of trojans or other malware downloaded from the Internet unknowingly. As a result, the trojan horse installs the main virus file and launches it on demand.

Malware developers are typically aware of the fact that people tend to fall for eye-catching advertisements or big company names. People are not always aware that emails can come from questionable sources, so the ones that are disguised as files with invoices or receipts can easily lead you to virus infiltration. In this case, you should stay away from suspicious emails and doublecheck content before clicking links and attachments presented there. If you don't know the sender, delete an email without opening it.

Terminate GandCrab 4.2 ransomware without a delay to prevent data loss

To remove GandCrab 4.2 ransomware safely, you should rely on anti-malware tools like Reimage Reimage Cleaner Intego and Malwarebytes. Also, these tools can find and delete any possible threats on your computer related to this virus. When programs come silently, they might have additional tools installed on the PC at the same time which can to be removed from the system. Otherwise, they can reinstall the malware and initiate another decryption process.

To perform GandCrab 4.2 removal, make sure you use the latest program's version. Do not try removal tools from questionable sites as you might get additional infections. If you are concerned about your encrypted data, we should warn you that security software cannot recover encrypted files. For that, try one of the recovery methods down below.

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Reimage Happiness
Intego Happiness
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 GandCrab 4.2 virus, follow these steps:

Remove GandCrab 4.2 using Safe Mode with Networking

To get rid of ransomware, try rebooting your system in SafeMode with Networking first:

  • 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 GandCrab 4.2

    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 GandCrab 4.2 removal.

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

Remove GandCrab 4.2 using System Restore

You can also try System Restore feature to recover after ransomware infection. Additionally, run a full system scan and removal malicious files.

  • 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 GandCrab 4.2. 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 GandCrab 4.2 removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove GandCrab 4.2 from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by security experts.

If your files are encrypted by GandCrab 4.2, you can use several methods to restore them:

Data Recovery Pro is a tool specifically designed to restore encrypted data

If your data was encrypted by GandCrab 4.2 ransomware or you accidentally deleted your files, try Data Recovery Pro and restore them:

  • 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 GandCrab 4.2 ransomware;
  • Restore them.

Recover individual files with Windows Previous Versions feature

Windows Previous versions can help in restoring encrypted files if System Restore was enabled before:

  • 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 files that got encrypted by GandCrab 4.2 ransomware

If ransomware you are dealing with left Shadow Volume Copies, you can recover your data with 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.

Use the official decryption tool for GandCrab 4.2

If your files were appended with one of these extensions, download this tool to recover them: .GDCB, .CRAB, .KRAB.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from GandCrab 4.2 and other ransomwares, use a reputable anti-spyware, such as Reimage Reimage Cleaner Intego, SpyHunter 5Combo Cleaner or Malwarebytes

Access your website securely from any location

When you work on the domain, site, blog, or different project that requires constant management, content creation, or coding, you may need to connect to the server and content management service more often. It is a hassle when your website is protected from suspicious connections and unauthorized IP addresses.

The best solution for creating a tighter network could be a dedicated/fixed IP address. If you make your IP address static and set to your device, you can connect to the CMS from any location and do not create any additional issues for server or network manager that need to monitor connections and activities. This is how you bypass some of the authentications factors and can remotely use your banking accounts without triggering suspicious with each login. 

VPN software providers like Private Internet Access can help you with such settings and offer the option to control the online reputation and manage projects easily from any part of the world. It is better to clock the access to your website from different IP addresses. So you can keep the project safe and secure when you have the dedicated IP address VPN and protected access to the content management system.

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

Computer users can suffer various losses due to cyber infections or their own faulty doings. Software issues created by malware or direct data loss due to encryption can lead to problems with your device or permanent damage. When you have proper up-to-date backups, you can easily recover after such an incident and get back to work.

It is crucial to create updates to your backups after any changes on the device, so you can get back to the point you were working on when malware changes anything or issues with the device causes data or performance corruption. Rely on such behavior and make file backup your daily or weekly habit.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware occurs out of nowhere. Use Data Recovery Pro for the system restoring purpose.

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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