Danger level:  
  (98/100)

Gandcrab 5.1 ransomware. How to delete? (Removal tutorial)

removal by Linas Kiguolis - - | Type: Ransomware

Gandcrab 5.1 ransomware – a dangerous cyber threat that prevents users from accessing their files until a ransom is paid

Gandcrab 5.1 ransomware

Gandcrab 5.1 ransomware is one of the newest variants of the notorious virus that locks up data and requires to pay a ransom of $1,200 – $2,400 in Bitcoin or Dash to recover access to pictures, videos, music, documents, databases and other files. This particular malware strain has been one of the most prolific culprits, infecting thousands of users around the world by spreading using exploit kits (such as Fallout), unprotected RDP, spam emails, and other methods. Once installed, Gandcrab 5.1 virus performs several system modifications, then uses Salsa20 for encryption to append a random string as a file extension. [victim’s_ID]-DECRYPT.txt is dropped on the desktop, and the wallpaper swapped to a brief message, explaining the situation to the victim. Unfortunately, Gandcrab 5.1 ransomware is not yet decryptable, although experts are continually working on decryption tools.

Name Gandcrab 5.1
Type Ransomware
Parent virus GandCrab v5
Cipher Salsa20
File extension Random string
Ransom size $1,200-2,400 in BTC or DASH
Distribution Exploit kits, repacked installers, spam emails, unprotected RDP, etc.
Elimination Use software that can detect the threat – Reimage, Malwarebytes MalwarebytesCombo Cleaner or other engines

Gandcrab 5.1 ransomware is widely spread around the world and does not target specific regions. Therefore, the possibility to get infected is quite high for those who are careless when using the internet. If that is the case, you should use this guide to remove Gandcrab 5.1 ransomware completely.

Once the malicious payload is executed, Gandcrab 5.1 virus will remove Shadow Volume Copies, modify Windows registry to launch with every system start and make other changes. File encryption follows straight away, and victims can notice within seconds that something is wrong.

Most of the data located on the system becomes encrypted, i.e., unusable. Therefore, a file like picture.jpg would be turned into something like picture.jpg.BujySh. The key to locked data is sent to a remote server that is controlled by Gandcrab 5.1 ransomware authors. The short warning on the wallpaper claims:

ENCRYPTED BY GANDCRAB 5.1
DEAR [USER],
YOUR FILES ARE UNDER STRONG PROTECTION BY OUR SOFTWARE.
IN ORDER TO RESTORE IT YOU MUST BUY DECRYPTOR
For further steps read BUJYSH-DECRYPT.html that is located in every encrypted folder.

Experts do not advise users contacting cybercriminals because there is a high chance of being scammed. Additionally, this motion would prove to malicious actors that Gandcrab 5.1 ransomware works and will attempt to develop and improve the virus further. Unfortunately, that is precisely what seems to be happening with the virus family, as new variants are coming out faster than researchers manage to create decryptors.

Thus, better take care of Gandcrab 5.1 ransomware removal first (we suggest using security software like Reimage, Malwarebytes MalwarebytesCombo Cleaner or other tools that can detect this version) and then proceed with file recovery. Check the guide for the process at the end of the article.

Stay away from risky activities online and protect your PC from infections

Ransomware is one of the biggest cyber threats currently. It is continually being evolved and even collaborates with other threats, such as data-stealers, crypto-miners, backdoors, and similar. Furthermore, the malicious software may result in data and money loss. Therefore, users should avoid this dangerous encounter at all costs.

To prevent malware’s entry, users should rely on security expert’s advice:

  • Security software is the key when it comes to protecting your device. Download anti-virus software and keep it up to date, as well as the real-time protection enabled;
  • Stay away from spam emails. Phishing emails and spoofing sites are notorious for delivering ransomware infections. Malicious messages usually come with an attachment that hides the payload, or a link that redirects to the host site;
  • Enable applications and services that would reduce the risk of infection: ad-block, VPN, password manager, etc.;
  • Patch your system and programs as soon as updates are available. Be aware that most professional viruses are distributed with the help of exploits and vulnerabilities;
  • Avoid using torrent and similar file-sharing sites;
  • Scan downloaded installers and other files with such tools like Virus Total.

Finally, we suggest you backup your files regularly on an external drive or a virtual machine.

Remove Gandcrab 5.1 ransomware with the help of reputable security software

Gandcrab 5.1 ransomware removal should be executed as soon as possible. For that, you should use anti-malware software. If you do not have such a tool installed (which is highly likely), you should download one from trusted vendors. You should also be aware that not all AV engines are capable of Gandcrab 5.1 virus elimination, as they use different databases. In such a case, download a separate application and scan the device again.

Once you remove Gandcrab 5.1 ransomware thoroughly, you can attempt file recovery. Unfortunately, there is no official decryptor available for this version. However, numerous tools were created in the past, and security researchers are continually working on cracking the new versions of this malware string. As of now, you can try our decryption solutions below – these are third-party tools that might be able to return at least some of your data. Note: make a copy of all your files before proceeding.

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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. Reimage scans the entire computer system and checks whether it is infected with spyware/malware or not. If you want to remove computer threats and secure your computer system, you should consider buying the licensed version of Reimage.
Alternative Security Tools
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Malwarebytes.
Alternative Security Tools
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.
Gandcrab 5.1 ransomware screenshot
Gandcrab 5.1 ransomware screenshot

To remove Gandcrab 5.1 virus, follow these steps:

Eliminate Gandcrab 5.1 using Safe Mode with Networking

To remove Gandcrab 5.1 safely, use Safe Mode with Networking:

  • Step 1: Restart your computer in Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Safe Mode with Networking from the list Choose 'Safe Mode with Networking' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Networking from the list of options in Startup Settings. Choose 'Enable Safe Mode with Networking' option
  • Step 2: Remove Gandcrab 5.1

    Sign in to your account and launch any Internet browser. Download a legitimate anti-malware software, for instance, Reimage. Make sure you update it to the latest version and then run a full system scan with it to detect and eliminate all malicious components of the ransomware to remove Gandcrab 5.1 completely.

If your ransomware does not allow you to access Safe Mode with Networking, please follow the instructions provided below.

Eliminate Gandcrab 5.1 using System Restore

System Restore can also be used as a solution for ransomware’s removal:

  • Step 1: Restart your computer in Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Go to Start Shutdown Restart OK.
    2. As soon as your computer starts, start pressing F8 key repeatedly before the Windows logo shows up.
    3. Choose Command Prompt from the list Choose 'Safe Mode with Command Prompt' option

    Windows 10 / Windows 8
    1. Click on the Power button at the Windows login screen, and then press and hold Shift key on your keyboard. Then click Restart.
    2. Then select Troubleshoot Advanced options Startup Settings and click Restart.
    3. Once your computer starts, select Enable Safe Mode with Command Prompt from the list of options in Startup Settings. Choose 'Enable Safe Mode with Command Prompt' option
  • Step 2: Perform a system restore to recover files and settings
    1. When the Command Prompt window appears, type in cd restore and press Enter. Type 'cd restore' without quotes and hit 'Enter'
    2. Then type rstrui.exe and hit Enter.. Type 'rstrui.exe' without quotes and hit 'Enter'
    3. In a new window that shows up, click the Next button and choose a restore point that was created before the infiltration of Gandcrab 5.1 and then click on the Next button again. When 'System Restore' wizard comes up, click 'Next'. Choose a preferable restore point and click 'Next'
    4. To start system restore, click Yes. Hit 'Yes' and start system restore
    After restoring the computer system to an antecedent date, install and check your computer with Reimage to uncover any remains of Gandcrab 5.1.

Bonus: Restore your files

Using the tutorial provided above you should be able to eliminate Gandcrab 5.1 from the infected device. novirus.uk team has also prepared an in-depth data recovery guide which you will also find above.

There are a couple of methods you can apply to recover data encrypted by Gandcrab 5.1:

Data Recovery Pro might help you recover your data

This application is a professional tool that might help you with file recovery affected by Gandcrab 5.1.

  • Download Data Recovery Pro;
  • Install Data Recovery on your computer following the steps indicated in the software’s Setup;
  • Run the program to scan your device for the data encrypted by Gandcrab 5.1 ransomware;
  • Recover the data.

Make use of Windows Previous Versions feature to recover separate files

This method will prove to be effective for separate files as long as you did enable System Restore before malware attack occurred.

  • Right-click on the encrypted document you want to recover;
  • Click “Properties” and navigate to “Previous versions” tab;
  • In the “Folder versions” section look for the available file copies. Choose the desired version and press “Restore”.

Take advantage of ShadowExplorer – it can recover all of your files under certain conditions

If the virus failed to eliminate Shadow Volume Copies, this software would get all your data back.

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Install Shadow Explorer on your computer following the instructions in the software’s Setup Wizard;
  • Run the program. Navigate to the menu on the top-left corner and select a disk containing your encrypted files. Look through the available folders;
  • When you find the folder you want to recover, right-click it and select “Export”. Also, choose where the recovered data will be stored.

No decryptor is available

It is strongly recommended to take precautions and secure your computer from malware attacks. To protect your PC from Gandcrab 5.1 and other dangerous viruses, you should install and keep a powerful malware removal tool, for instance, Reimage, Malwarebytes MalwarebytesCombo Cleaner or Plumbytes Anti-MalwareMalwarebytes Malwarebytes.

About the author

Linas Kiguolis
Linas Kiguolis

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Source: https://www.2-spyware.com/remove-gandcrab-5-1-ransomware.html

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