.KRAB Files Virus – How to Remove GANDCRAB V4 and Restore Data

.KRAB Files Virus – How to Remove GANDCRAB V4 and Restore Data

This article aims to explain what exactly is the .KRAB files virus and then help victims to remove the ransomware and potentially restore encrypted files.

.KRAB Files Virus How to Remove GANDCRAB V4 and Restore Data sensorstechforum

The .KRAB files virus is a new version of GandCrab data locker ransomware. The threat has recently been released in active attack campaigns against computer users worldwide. Its name is a derivative of the specific file extension .KRAB placed at the end of all corrupted files. Following encryption, this new GANDCRAB V4 drops a ransom note to instruct victims how to pay for the unique decryption key that will recover .KRAB files. By reaching the end of the article, you will know how to remove the threat and find some alternative data recovery methods that may help you to restore .KRAB files without paying the ransom.

Threat Summary

Name.KRAB Files Virus
TypeRansomware, Cryptovirus
Short DescriptionVersion 4 of GandCrab ransom virus family. It encrypts your files and asks you to pay a ransom for unique recovery key.
SymptomsEncrypted files are renamed with the extension .KRAB. They remain unusable until an efficient recovery solution is used. A ransom note, named KRAB-DECRYPT.txt is dropped on your PC.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by .KRAB Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .KRAB Files Virus.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

.KRAB Files Virus – Update December 2018

The large number of ongoing GANDCRAB V4 ransomware attacks have caused infections on a global scale. The analysis done of the virus’s code has allowed experts to devise a decryptor that is able to restore files of some of the variants — see here

how to decrypt files encrypted by GandCrab ransomware for free.

.KRAB Files Virus – Update August 2018

The .KRAB Files Virus continues to spread in August, 2018. Malware researchers suspect that more countries might be getting affected as more languages have been added to the payment page of the ransomware. You can clearly see that from the below screenshot:

If more languages are being added, either the cybercriminals are going to spread their malware in more countries (by using malvertising campaigns, for example) or they know that those countries are already affected by the .KRAB Files Virus.

.KRAB Files Virus – How Does It Infect?

Spam email campaigns are considered to be the primary method used for the distribution of .KRAB files virus. Due to the fact that hackers could easily modify the email sender and address, they prefer to release their malicious code in spam email campaigns and attempt to trick as many users as possible to infect their PCs. So alike the emails used for the distribution of the previous versions of GandCrab ransomware the emails that carry GANDCRAB V4 payload may contain the following information:

From: {Fake name and e-mail address}
Subject: Payment Invoice #(number)

Dear Customer,
To read your document please open the attachment and reply as soon as possible.
Kind regards
TCR Customer Support

As for the subjects of these emails, they could be designed with one of the following patterns:

Document #{number}
Invoice #{number}
Order #{number}
Payment #{number}
Payment Invoice #{number}
Payment Invoice #{number}
Ticket #{number}
Your Document #{number}
Your Order #{number}
Your Ticket #{number}

Such emails usually contain malicious file attachments or links to compromised web pages. Like some of the previous GandCrab ransomware versions, .KRAB files virus may use JavaScript files embedded in PDFs or Microsoft Office documents that are presented as legitimate. Compromised files may be archived and attached as .7z types of files as well. The moment you open such file on your PC the ransomware payload starts as well.

In other cases hyperlinks presented in the text message may land you on a compromised web page that is designed to download and run the ransomware directly on your PC. At this point, it is known that the following domain addresses are used to drop GANDCRAB V4 payload:


A tip that could help you to improve your online security and keep devastating malware infections like GANDCRAB V4 away from your PC is to use free online file extractor before you open a dubious file on your PC. Such tool will scan the code of the uploaded file and check its security level. After, the scan you could see whether the uploaded file is a potentially harmful one. The details about the file will help you to refrain from opening it on your PC.

.KRAB Files Virus (GANDCRAB V4) – Analysis

New version of the notorious GandCrab ransomware has been spotted in the wild. This is acutally the fifth version of the threat after GandCrab, GandCrab v2, GANDCRAB V2.1, and GandCrab 3. However, hackers present the last iteration of their ransomware as GANDCRAB V4.

The infection process begins at the moment when the payload is started on a target computer system. Immediately after this happens the payload is likely to drop and execute additional malicious files needed for the completion of the attack. In order to evade detection .KRAB crypto virus may drop files that resemble legitimate system processes. These files are designed to perform various system modifications that plague essential settings and enable the ransomware to obtain persistent presence.

In case of infection with .KRAB virus some registry sub-keys including but not limited to Run and RunOnce may be plagued the ransomware. By exploiting the functionalities of these two registry keys the threat becomes able to run its malicious files on each system start.

As reported by infected users, GANDCRAB V4 also dubbed .KRAB files virus has some specific modifications. One of them is the ransom note dropped at the end of the attack. It is contained in a file called KRAB-DECRYPT.txt. And here is what the text in this file reads:



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 a 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 – https://www.torproject.org/
| 1. Install Tor browser
| 2. Open Tor Browser
| 3. Open link in TOR browser: ***
| 4. Follow the instructions on this page

On our page you will see instructions on payment and get the opportunity to decrypt 1 file for free.





KRAB-DECRYPT.txt ransom note GANDCRAB V4 ransomware .KRAB virus sensorstechforum

Threat actors do not specify the amount of the demanded ransom but it is likely that they will want the transfer in cryptocurrency. For the previous GandCrab versions it is known that hackers demand an amount of $500 in DASH cryptocurrency in exchange for the decryption key.

What we could advise you is to refrain from paying the ransom until you try all existing alternative data recovery methods that are believed to help you to restore a few to all of the encrypted .KRAB files.

.KRAB Files Virus – Encryption Process

Similar to the previous GandCrab ransomware iterations this one plagues computer systems with the main purpose to locate predefined target types of files and encrypt them with the help of Salsa20 stream cipher algorithm. This process transforms all files that store sensitive information in a way that you cannot use them anymore.

So in case of infection it is likely that all of the following files will remain encrypted until an efficient recovery solution restores their original code:


After encryption, all corrupted files could be recognized by the extension .KRAB appended at the end of their names.

The .KRAB files virus could be set to erase all the Shadow Volume Copies from the Windows operating system with the help of the following command:

→vssadmin.exe delete shadows /all /Quiet

Then the above-stated command is executed one of the prominent ways to restore your data is eliminated. If a computer device was infected with this ransomware and your files are locked, read on through to find out how you could potentially restore some files back to their normal state.

Remove .KRAB Files Virus and Restore Encrypted Files

The removal of .KRAB files virus demands a bit of technical experience and ability to recognize malware traits. Meanwhile there is no doubt that you should remove this nasty ransomware from the infected PC as soon as you detect it. Don’t wait until it’s too late. The threat may take the chance to spread its infection files across the whole network.

Below you could find how to remove it step by step. Beware that ransomware is a threat with highly complex code that is designed to plague not only your files but your whole system. So as recommended by security researchers you need to utilize an advanced anti-malware tool in case that you want to be sure that it’s gone forever. Furthermore, such tool will keep your system protected against devastating threats like GANDCRAB V4 and other kinds of malware that endanger your online security.

After the removal phase, you can proceed to the second phase which aims to show you some of the existing alternative data recovery approaches that may help you to restore a few to all of the encrypted .KRAB files.

Gergana Ivanova

Gergana Ivanova

Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for four years, researching malware and reporting on the latest infections.

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  1. AvatarAkshay

    How do I completely restore my .KRAB extension files to normal stage?.very urgent.. reply me as soon as possible..

    1. Gergana IvanovaGergana Ivanova (Post author)

      Hey Akshay,

      Gandcrab ransomware is a threat with very complex code. At this point, there is no evidence of successful attempts of security experts to crack its code. So you could only attempt to use the help of alternative data recovery methods that may restore some of your .KRAB files. Check them out in step two “Restore files encrypted by .KRAB Files Virus” listed in the removal above.

  2. AvatarKen Abare

    I’m running the decrypt software but it’s just stuck at looking for decryption key.

    We have been hit with the krab ransomware. Files are encrypted with a .krab extension. Please help.

    1. Gergana IvanovaGergana Ivanova (Post author)

      Greetings Ken Abare,

      Currently, only alternative data recovery approaches provide chances for the restore of .KRAB files. You could find some of them in the guide above. However, keep in mind that they do not guarantee maximum efficiency.

  3. AvatarFrancis Teo

    Krab Files – are you able to assist?
    Is sending you the infected/encrypted files safe for
    both of us?


    1. Gergana IvanovaGergana Ivanova (Post author)

      Hey Francis,

      For now, all that we could do is to suggest checking the content revealed in the “restore .KRAB files” step listed in our guide. Perhaps some of the methods described there may be effective to some extent.

  4. Avatargabi

    Saludos, como podria hacer en mi caso, me encuentro en venezuela, y no tengo como pagar para utilizar o comprar la herramienta que han indicado para limpiar mi pc, me podrian sugerir algo para ayudarme por favor

  5. Gergana IvanovaGergana Ivanova (Post author)

    Hi gabi,

    Unfortunately, there is no available free decryption solution for Gandcrab ransomware. The moment we spot one we will make an update of our article with a download link for it. For now, we could advise you to consider the use of alternative data recovery approaches some of which are listed in our removal guide. What you should know is that they do not guarantee maximum efficiency for .KRAB files recovery process.

    1. AvatarPatricio

      Tengo Unos archivos importantes con Extencion KRAB, que me pueden suguerir pata poder recuperar algo

  6. Avatardipursit

    I am very confused to return the data that has been encrypted by this #grandcrab. Hopefully, the computer experts will immediately release the decryptor. But we have to run with time for data and cannot be silent. What recovery software can restore this encrypted data, please tell me.

    Best regards

    1. Tsetso MihailovTsetso Mihailov

      A decryption tool for this GandCrab version is released. You can read more about it in the corresponding article: https://sensorstechforum.com/decrypt-gandcrab-ransomware-files/

  7. AvatarOmar

    is there way to decrypt KRAB encrypted files ? I don’t think bitdefender Decryption tool is working ! I ran it a couple of times but it can’t seem to decrypt the file.

    Inside the Log file generated by the tool it says , No match ! is there any luck with anyone out there in unlocking the encrypted files ! lets share your thoughts

    thank you

    1. Tsetso MihailovTsetso Mihailov

      The tool is reported working by many users, but some of them have the misfortune of it not working for their version. The tool needs 1 encrypted file and its original, non-encrypted quivalent. See detailed instructions in our article: https://sensorstechforum.com/decrypt-gandcrab-ransomware-files/

  8. AvatarPaul

    How can I decrypt krab virus on my pc

    1. Tsetso MihailovTsetso Mihailov

      Here’s how – check the decryption instructions about it in here: https://sensorstechforum.com/decrypt-gandcrab-ransomware-files/

  9. AvatarShif

    recovery software only recovered same file with .krab, .crab extension. as eg xxxxx.xls.Crab I need file with .xls only. how can I remove the second extension??

    1. Tsetso MihailovTsetso Mihailov

      Try following the instructions in the article we have written about the official decryption tool made by BitDefender: https://sensorstechforum.com/decrypt-gandcrab-ransomware-files/



    1. Tsetso MihailovTsetso Mihailov

      The available solution that is reported working is BitDefender’s decryptor – find out more about it: https://sensorstechforum.com/decrypt-gandcrab-ransomware-files/

  11. AvatarBLAINE


  12. AvatarPaul Anthony

    Hey man look, i got gandcrab and i wiped my computer, i kept no old files. After that process i ran the spplication just to make sure that it was gone and it said i was safe but the thing is, in my recovery drive, i saw the gandcrab txt file, does this mean tyat the malware is still on my device but its just hidden? Another thing is my factory reset only got to 48% froze for 3 hours then i turned my computer on and off and it said all personal files were deleted but not everything, and although the scan said i was good, i dont know if because the txt file was in my revovery drive i still have gandcrab.


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