KRUU Ransomware. How to decrypt .kruu files?

If you cannot open your photos, documents, or data and see the .kruu extension on them, your PC is surely infected with Kruu ransomware. It belongs to STOP/Djvu ransomware family

Kruu ransomware ciphers personal documents spotted on the victim’s PC with the extension “.kruu” and after that generates the ransom note in each folder which contains encrypted files. The instructions are placed on the victim’s PC in the “readme.txt” file. Its activity is generally comparable to other examples of the same ransomware family: Nooa, Mine, Egfg.

What is Kruu Ransomware?

NameKruu Virus
Ransomware family1DJVU/STOP2 ransomware
Ransomware note_readme.txt
RansomFrom $490 to $980,
SymptomsThe images, videos, and other documents have the “.kruu” extension and cannot be opened by any programs
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Kruu is file-encrypting ransomware that prevents regular access to your text files, Excel tables, videos and pics by ciphering them. It marks the encrypted files with the “.kruu” extension. Then Kruu ransomware adds a ransom note (readme.txt) to each folder. In this note, you can see the guidance to pay the ransom ($490-$980 in Bitcoin) to a certain Bitcoin address. The AES-256 or RSA-1028 cipher it utilizes to cipher the files is not decryptable with modern computers. Even quantum PCs that already exist will spend hundreds of years to get the decryption key.

How dangerous is the Kruu ransomware?

When Kruu ransomware appears on your computer, it will run through your disks for images, videos, and also important documents. It [ciphers all widespread file formats- .psd, .doc, .docx, .xls, .xlsx, .pdf, .jpeg, .png, et cetera. When these files are located, the ransomware will cipher them and also change their extension to “.kruu” so that you understand what happened.

After the Kruu ransomware ciphered the data on your PC, it will generate the last “readme.txt” file on the main screen. In addition to the money transferring instructions, the victims also see the emails to contact the crooks – and

Here is the money ransom note that the Kruu ransomware shows to its victims:


Don't worry, you can return all your files!
All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees you have?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information.
You can get and look video overview decrypt tool:
Price of private key and decrypt software is $980.
Discount 50% available if you contact us first 72 hours, that's price for you is $490.
Please note that you'll never restore your data without payment.
Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.

To get this software you need write on our e-mail:

Reserve e-mail address to contact us:

How did the Kruu ransomware get on my computer?

The Kruu ransomware spreads by placing links to download hacked programs or games. Cybercriminals that spread this ransomware are very tricky, and try to keep in touch with current trends. New games releases, new popular films – Kruu developers make everything to get their victims on that. Some of the most common strategies these burglars use is one-day sites with torrent downloading links. Nonetheless, pursuing the contemporary things is not the single tactic these crooks utilize. Methods that have already turned into standard, such as e-mail spamming, are also normal for STOP/Djvu ransomware distribution.

Malicious email spam
The example of email spamming that may lead to Kruu ransomware injection

Avoiding this ransomware does not require a lot of initiative. Considering the regular principles of computer hygiene will substantially minimize all dangers. Keep in mind that starting all documents you get on email is not a good idea. Even worse situation is to enable macros in Microsoft Office documents. But it is better to stop the malware attack at the moment when you have only opened the email message. Inspecting the sender’s address can point out a lot about what you can anticipate, and when you see things like “”– it is likely a genuine e-mail. On the other hand, stuff that tries to appear like Amazon or FedEx delivery notice, but uses the email address of “”– should make you get on the alarm. Above, you can see the example of such a message.

Illegal sources of different digital things require some extra description. Violating copyright law already throws you to the chance of being fined. Nonetheless, using torrent trackers or third-party websites to download “free” programs also exposes you to various malware. Nobody can oversee undisclosed people who start the torrent seeding or publish the hacked program version on the site with pirated program.

Kruu virus removal instructions.

Download Trojan Killer Portable

Trojan Killer Portable Download

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This guide below shows how to use Trojan Killer Portable3 for Kruu virus detection and removal:

  • STEP 1. Download and install Trojan Killer.

  • STEP 2. Click on "Finish".

  • STEP 3. Wait until necessary updates are downloaded and installed.

  • STEP 4. Select computer scan type.

  • STEP 5. The software will begin scanning your computer.

  • STEP 6. Click on "Cure PC".

Restore the files encrypted by the Kruu ransomware

In most cases, it’s impossible to recover the files encrypted by the Kruu ransomware because the private key needed to unlock the encrypted files is only available through cybercriminals. However, we’ve listed one option you can use to recover your files below.

Warning! Make sure you remove the ransomware from your system first, otherwise, it will repeatedly encrypt your files.

If your files were encrypted with an offline key, there is a chance you can recover them by using Emsisoft Decryptor for the STOP/Djvu decryption tool. Follow the below guide to recover your files using the Emsisoft Decryptor for STOP/Djvu.

  1. You can download Emsisoft Decryptor for STOP Djvu by clicking this link.
  2. When the decryptor has finished downloading, double-click on “decrypt_STOPDjvu.exe” to run this program on your computer.
  3. Click the “Decrypt” button to start the decryption process for Kruu files. The screen will switch to a status view, informing you about your files’ current process and decryption status.
  4. The decryptor will inform you once the decryption process will be finished. If you require the report for your records, you can save it by clicking the “Save log” button.

If the Emsisoft Decryptor can’t decrypt your .kruu files and you do not plan on paying the ransom, it is advised that you make an image of the encrypted drives so that you can decrypt them in the future.

Your computer should now be free of the Kruu ransomware infection. However, suppose your current antivirus allowed this malicious program on your computer. In that case, you might want to consider purchasing the full-featured version of Trojan Killer to protect against these types of threats in the future.

KRUU Ransomware — How To Remove Virus & Decrypt Files?

Name: KRUU Virus

Description: KRUU Virus is a STOP/DJVU family of ransomware-type virus. It encrypts files, video, photos, documents. Encrypted files can be tracked by a specific kruu extension. KRUU ransomware asks victims for a ransom fee about $490 - $980 in Bitcoin.

Offer price: 480

Currency: $

Operating System: Windows

Application Category: Virus

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About William Reddy

I am from Ireland. My parents bought me a computer when I was 11, and several months after I have got a virus on this PC. I decided to enter the INSA Centre Val de Loire university after being graduated from the school. This French educational institution was offering a brand-new cybersecurity course. After getting the master's degree in cybersecurity, I've started working as a virus analyst in a little anti-malware vendor.