NOOA Virus (.nooa File) Ransomware — Remove & Decrypt Files

Written by William Reddy

If you cannot open your images, documents, or other files and see the .nooa extension on them, your PC is definitely infected with Nooa ransomware. It pertains to STOP/Djvu ransomware family

Nooa ransomware ciphers personal documents spotted on the victim’s PC with the extension “.nooa” and then 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 task is generally comparable to other variants of the same ransomware family: Mine, Egfg, Xcvf.

What is Nooa Ransomware?

NameNooa Virus
Ransomware family1DJVU/STOP2 ransomware
Ransomware note_readme.txt
RansomFrom $490 to $980,
SymptomsThe images, videos, and other documents have the “.nooa” extension and cannot be opened by any programs
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Nooa is file-encrypting ransomware that prevents normal access to your text files, Excel tables, videos and photos by ciphering them. It marks the encrypted files with the “.nooa” extension. Then Nooa ransomware adds a money ransom note (readme.txt) to each folder. In it, you can see the guidance to pay the ransom ($490-$980 in Bitcoin) to a certain Bitcoin wallet. The AES-256 or RSA-1028 cipher it uses to encrypt the documents is not decryptable with contemporary computers. Even quantum computers that already exist will likely spend thousands of years to brute force the decryption key.

How dangerous is the Nooa ransomware?

When Nooa ransomware appears on your computer, it will run through your system for images, videos, and also important documents. It encrypt] all widespread file formats- .psd, .doc, .docx, .xls, .xlsx, .pdf, .jpeg, .png, et cetera. When these files are found, the ransomware will cipher them and also change their extension to “.nooa” to make sure that you understand what happened.

After the Nooa ransomware ciphered the data on your computer, it will generate the last “readme.txt” file on the main screen. Besides the ransom payment instructions, the victims also see the emails to contact the cybercriminals – and

Here is the ransom note that the Nooa 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 Nooa ransomware get on my computer?

The Nooa ransomware spreads by placing websites to download hacked programs or games. Cybercriminals that spread this ransomware are pretty foxy, and try to keep in touch with contemporary things. New games introductions, new popular films – Nooa creators make everything to get their victims on that. One of the most preferred methods these burglars put to use is one-day websites with torrent downloading links. Nevertheless, using the contemporary news is not the only manner these criminals utilize. Ways that have already become classic, such as e-mail spamming, are also usual for STOP/Djvu ransomware distribution.

Malicious email spam

The example of email spamming that may lead to Nooa ransomware injection

Avoiding this ransomware does not need a lot of effort. Considering the regular principles of computer hygiene will significantly decrease all risks. Remember that starting all files you get on email is not a great idea. Even worse situation is to allow macros in Microsoft Office files. However, it is much better to stop the malware intrusion at the moment when you have just opened the email message. Examining the sender’s address can say a lot about what you can anticipate, and also when you see the thing like “”– it is likely a genuine e-mail. Meanwhile, stuff that tries to look similar to Amazon or FedEx shipping notice, however, uses the email address of “”– need to make you be on the alarm. Above, you can see the example of such a message.

Outlaw sources of different digital things need some additional explanation. Going against copyright law surely throws you to the risk of being fined. Nonetheless, utilizing torrent trackers or third-party websites to download “free” programs also exposes you to different malware. No one can control anonymous people that launch the torrent seeding or publish the hacked program version on the site with pirated software.

Nooa 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 Nooa 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 Nooa ransomware

In most cases, it’s impossible to recover the files encrypted by the Nooa 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 Nooa 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 .nooa 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 Nooa 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.

NOOA Ransomware — How To Remove Virus & Decrypt Files?

Name: NOOA Virus

Description: NOOA Virus is a STOP/DJVU family of ransomware-type virus. It encrypts files, video, photos, documents. Encrypted files can be tracked by a specific nooa extension. NOOA 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 the author

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.

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