How to remove Nooa ransomware

The main goal of Nooa ransomware: lock files and ask you to pay a ransom

Nooa ransomware emerged in early August 2021 – it continues the malicious business of the Djvu malware family. The virus mainly spreads via contaminated software crack files or program installers, usually downloaded from unofficial third-party sources – the infection begins as soon as the malicious .exe file is opened.

As soon as malware gains access to your Windows machine, it begins its changing process. One of the most devastating traits of ransomware^[1] is its file locking capability. This particular threat encrypts all videos, documents, pictures, and other personal data with a strong RSA^[2] encryption algorithm and appends. nooa appendix in the process. During file encryption, the virus shows a fake Windows update window to confuse victims and make them believe that no harm is being done.

However, as soon as this is complete, users can soon realize that none of their files can be opened anymore. Note that this does not actually corrupt files but rather locks them behind a special, unique key accessible to the attackers. At this point, if the proper encryption process fails and an offline key is used, there is a chance of restoring files for free in the future – check the bottom sections for more details.

As it turns out, the reality is pretty grim after the infection has spread and files get encrypted – cybercriminals are quick to inform victims via the _readme.txt note. In there, it is explained that all the personal data has been locked, and the $980 ransom, to be paid in Bitcoin, has to be transferred to a particular online wallet. To create a sense of urgency, a discount of 50% is also offered to victims (as long as they contact hackers within 72 hours of the infection). Crooks also leave contact emails to be used for communication purposes:

• manager@mailtemp.ch
• managerhelper@airmail.cc.

As evident, contacting the attackers is rather risky, as you may never see the decryption software that they are promising. Even if they do fulfill their promises, the payments only prompt them to create more malware and infect more people. Therefore, forwarding the money should be an absolutely last resort.

Besides, few alternative methods might help you restore files for free, so please do not make rash decisions. Read through this article and find out the best course of action when dealing with a ransomware infection like this one.

Do not trust cyber criminals. Hackers who are responsible for the Djvu family release new viruses several times a month. By paying a ransom, you will only encourage the creation of new threats. Ransom note may seem convincing, but pay no attention to these words:

ATTENTION!

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:
hxxps://we.tl/t-9CYW99VhUR
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:
manager@mailtemp.ch

Reserve e-mail address to contact us:
helpmanager@airmail.cc

Your personal ID:

Since we’ve been helping people get out of sticky situations for over two decades, we’ve compiled a lot of knowledge about ransomware and ways to recover .nooa files. Keep reading and following our instructions, and you might be able to recover your files without contacting these criminals. In fact, even contacting people behind this threat can result in additional virus infiltration. Therefore, we do not recommend writing to them.

Before removing the virus, save all important encrypted files on a separate medium. You can use a USB flash drive or SSD. Encrypted data does not hold any malicious code, so it is safe to transfer to other devices. However, be sure to disconnect the medium after copying the files.

Unfortunately, the newest ransomware versions are created with the impossible decryption opportunity because the virus uses online ID when encoding data. This means that each victim gets a unique ID and a simple decryption tool won’t help to unlock the files. But even don’t give up just yet. Below you will find different methods that may help to recover some encrypted files.

Malware removal and system fix

This virus not only locks personal files but also alters data placed in system folders, so functions and activities needed for the proper performance get altered and controlled by cybercriminals.

Additionally, when you download new files to the computer, all data will be encrypted too. Therefore, you won’t be able to use your device normally until it is infected. If you want to get rid of the threat, you need to use reliable tools like SpyHunterCombo Cleaner. Powerful anti-malware software can help terminate the cryptovirus properly. This program will help to remove other viruses too.

Only after successful ransomware removal, you can try to recover encrypted files. However, before starting the recovery process, make sure that the system is completely clean from the virus. Any leftover files can trigger issues with secondary encryption of malicious processes. Programs like MalwarebytesMalwarebytes can scan the system fully and detect everything, so the cryptovirus is no longer active. After that goes the system cleaning and recovery.

It is very important to follow all the steps because you cannot leave an active Nooa file virus on your device. Without proper virus removal, you will not be able to use your computer normally or restore affected files.

Once a computer is infected with malware,^[3] its system is changed to operate differently. For example, an infection can alter the Windows registry database, damage vital bootup, and other sections, delete or corrupt DLL files, etc. Once a system file is damaged by malware, antivirus software is not capable of doing anything about it, leaving it just the way it is. Consequently, users might experience performance, stability, and usability issues, to the point where a full Windows reinstallation is required.

Therefore, we highly recommend using a one-of-a-kind, patented technology of FortectIntego repair. Not only can it fix virus damage after the infection, but it is also capable of removing malware that has already broken into the system thanks to several engines used by the program. Besides, the application is also capable of fixing various Windows-related issues that are not caused by malware infections, for example, Blue Screen errors, freezes, registry errors, damaged DLLs, etc.

• Download the application by clicking on the link above
• Click on the ReimageRepair.exe
  
  
• If User Account Control (UAC) shows up, select Yes
• Press Install and wait till the program finishes the installation process
  
• The analysis of your machine will begin immediately
  
• Once complete, check the results – they will be listed in the Summary
• You can now click on each of the issues and fix them manually
• If you see many problems that you find difficult to fix, we recommend you purchase the license and fix them automatically.
  

This program is a good choice if you want to have a tool that can help with various viruses and damage that cyber infections typically cause. With this tool, you would not have to worry about serious computer issues in the future too. If you run FortectIntego and the tool shows many damaged and altered pieces, you simply need to follow suggestions and fix everything. Only after a fully fixed system, you can try to recover .nooa files.

It might be possible to perform .nooa file decryption if offline keys were used

If you want to recover encrypted files after the Djvu/STOP ransomware infection, you should try to use the Emsisoft decryptor. Unfortunately, this tool only works if the data is locked with an offline ID. The cryptovirus usually uses an online ID but sometimes malware fails to communicate with its remote servers. So, it is worth checking if the Emsisoft decryptor will help in your case.

However, to decrypt .nooa files with this tool, somebody from the victims has to pay cybercriminals, retrieve an offline key, and then share it with security experts at Emsisoft. It can also happen if researchers manage to get a key from the virus developers. But until the ransomware is quite new, the chances of this happening are extremely slim.

If the decryptor says your data was locked with an offline ID but cannot be recovered currently, you should try later. Cybersecurity experts may be able to get the key in the future. Please follow these illustrated instructions if you decided to use the decryptor:

• Download the app from the official Emsisoft website.
  
• After pressing the Download button, a small pop-up at the bottom, titled decrypt_STOPDjvu.exe should show up – click it.
  
• If User Account Control (UAC) message shows up, press Yes.
• Agree to License Terms by pressing Yes.
  
  
• After Disclaimer shows up, press OK.
• The tool should automatically populate the affected folders, although you can also do it by pressing Add folder at the bottom.
  
• Press Decrypt.
  
  

From here, there are three available outcomes:

1. “Decrypted!” will be shown under files that were decrypted successfully – they are now usable again.
2. “Error: Unable to decrypt file with ID:” means that the keys for this version of the virus have not yet been retrieved, so you should try later.
3. “This ID appears to be an online ID, decryption is impossible” – you are unable to decrypt files with this tool.

If decryption is not helpful, try another option

Since the Emsisoft decryption tool is helpful only for some of the versions and many users do not prepare proper data backups before being attacked by ransomware, they might often lose access to their files permanently. Not wanting this to happen, users often try to look for other ways to recover files. Sometimes victims even try to pay a ransom but paying criminals is also very risky, as they might not fulfill the promises and never send back the required decryption tool.

While this might sound terrible, you shouldn’t think that all is lost because data recovery software might be able to help you in some situations. You may be able to recover at least some of the data (each case is different, so there is no guarantee), so it’s worth a try. Therefore, we suggest trying regardless of which ransomware attacked your computer. Before you begin, several pointers are important while dealing with this situation:

• Since the encrypted data on your computer might permanently be damaged by security or data recovery software, you should first make backups of it – use a USB flash drive or another storage.
• Only attempt to recover your files using this method after you perform a scan with anti-malware software.

Install data recovery software

1. Download Data Recovery Pro.
2. Double-click the installer to launch it.
   
3. Follow on-screen instructions to install the software.
   
4. As soon as you press Finish, you can use the app.
5. Select Everything or pick individual folders where you want the files to be recovered from.
   
6. Press Next.
7. At the bottom, enable Deep scan and pick which Disks you want to be scanned.
   
8. Press Scan and wait till it is complete.
   
9. You can now pick which folders/files to recover – don’t forget you also have the option to search by the file name!
10. Press Recover to retrieve your files.