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Nobu Virus File

What Is Nobu Virus?

Nobu infection is the name of a well-known ransomware, that comes from the STOP/DJVU family of viruses. This indicates that it is a cryptovirus, that intends to encrypt your important file types and after that use them against you to encourage you into making a extortion payment to the cyber-criminals that have created it. The ransom instructions (written in the _readme.txt file) of Nobu virus are carefully made plus they intend to motivate you right into contacting the crooks and paying BitCoin or various other forms of cryptocurrencies and they even give a deadline after which the price can double or you risk loosing your files.

Nobu Infection

As a strain of STOP ransomware which is the leading ransomware threat for the last months, the Nobu virus is an infection that damages your files with the goal for some criminals to make money of you.

At first, this virus interferes with the system files of Windows to make sure that it can avoid detection and encode files while uninterrupted by protection software. By adding values and data in the RUN or RUNONCE registry sub-keys in the Windows RegEdit, the Nobu infection can run on your computer every time you press the power button.

Nobu Virus Summary

Name Nobu Virus also known as .nobu file or .Nobu Ransomware
File Extension .nobu
Type Ransomware, Cryptovirus
Short Description The ransomware encrypts files on your computer system and demands a ransom to be paid to allegedly recover them.
Symptoms The Nobu ransomware will encrypt your files by appending the .nobu extension to them.
Ransom Demanding Note _readme.txt
Distribution Method Spam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by malware


Malware Removal Tool

User Experience Join Our Forum to Discuss Nobu virus.

Nobu Virus – What We Know About It

Nobu infection is a dangerous ransomware infection that affects Windows computers and also is the last infection you would certainly want.

Hackers are believed to rely on approaches like spam emails, files that are attached, hacked internet sites, or corrupted free software installers for the spread of their dangerous Nobu infection. Due to the fact that the malspam is an effective strategy that allows the criminals to spread their virus utilizing big e-mail spam campaigns, they often choose other and more innovative methods as well.

One of the most often used files, utilized by malware are executable files, self-extractors or different other Microsoft Office documents, applications, script files, PDFs and other.

When this partiuclar virus establishes an infection, it may download its virus files. They may be located under different, often randomized names in the following folders:

  • %AppData%
  • %LocalLow%.
  • %Windows%.
  • %System%.
  • %system32%.
  • %Roaming%.
  • %Local%
  • %Temp%.
  • %ProgramData%.

The Nobu infection has the capacity of infecting your Windows computer via 2 major means:

  • If the data is submitted as an app readily available for free download online, but rather than the app, you download and install the infection.
  • If it is sent out to you straight as an e-mail file that claims to be a legitimate, like invoices, plane ticket documents and others.

Once the infection is downloaded and has ran the virus starts to do these activities on your computer:

  • Get read and write permissions.
  • Become administator.
  • Establish connection with the cyber-criminals running it.
  • Examine If it has infected your computer system previously and if so deletes itself.
  • Makes Windows registry entries in the “Run” and also “RunOnce” computer registry sub-keys.

The primary task of Nobu virus is revolved around encrypting your important information. The infection thoroughly scans for and then encodes the following sorts of file types while adding its extension:

  • Videos.
  • Pictures.
  • Documents.
  • Audio.
  • Database documents.
  • Archives.
  • Anything saved in a flash drive.
  • Backups.

When the Nobu virus has encoded your files, it generates a unique decryption key that can be combined with decryptor to decode your documents. Unfortunately, the cyber-criminals who are behind Nobu infection hide this decryptor and also desire you to pay cash in the form of BitCoin to ensure that they can send you decryption. Their instructions are well written in the _readme.txt ransom file, situated by this infection on your computer system. It has the following text:


Don’t worry, you can return all your files!
All your files like photos, 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:

Your personal ID:

The Nobu virus encrypts the documents including the documents extension whereby it can be acknowledged. If you eliminate this data expansion, you will NOT repair the file, so do refrain from doing it, because you risk damaging the documents itself.

The documents that have the .nobu extension can not be opened due to the fact that they are security. Ransomware infections, like Nobu infection are part of the STOP family of crypto malware. They are defined with making use of a very specific security “language”, called Advanced Security Criterion. This formula, likewise referred to as AES encrypts data and changes information from them, producing an assymetric decryption secret. The cipher can be extremely challenging to decrypt despite a supercomputer. The only means to decrypt it is if you recognize the decryption essential on your own. Normally, cyber-security researchers, like Michael Gillespie and the experts over at Emsisoft take care of to manipulate the file encryption algorithm of QUIT Ransomware variation, like when it comes to Nobu infection and also they generate a decryption for the new versions of this infection. However, remember that the Nobu virus documents can be decrypted just if the decryption key is the Offline kind. For the Online type of tricks, decryption as well as data recovery is significantly more difficult than typical.

Nobu Virus Removal and also Submit Recuperation.

To remove Nobu virus, you should follow the steps below. They are made to help you to get rid of the Nobu ransomware virus. Nonetheless, if you do not know where exactly are the infection files situated, you can download and run a scan with an expert anti-malware software to manage this danger. This program will check for all of this ransomware’s destructive files on your computer and also see to it that the files are gotten rid of. For recovery, the only options we have as alternative to decryption are recommended in the “restore” step below. They may not be a 100% solution, but with them you have some hope of recouping your files till a decryptor comes out for the Nobu virus. In the meantime, we do advise that you do a backup of the files until the researchers from Emsisoft release a decryptor.

Nobu Virus File Removal Guide

Ventsislav Krastev

Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.

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Step 1: Scan for Nobu virus with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

2. After you have installed SpyHunter, wait for it to update automatically.

scan for and delete ransomware virus step 2

3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

scan for and delete ransomware virus step 3

4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

scan for and delete ransomware virus step 4

If any threats have been removed, it is highly recommended to restart your PC.

Ransomware Automatic Removal - Video Guide

Step 2: Uninstall Nobu virus and related malware from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.
delete ransomware from windows step 1

2. In the field type in "appwiz.cpl" and press ENTER.
delete ransomware from windows step 2

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
delete ransomware from windows step 3Follow the instructions above and you will successfully delete most unwanted and malicious programs.

Step 3: Clean any registries, created by Nobu virus on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Nobu virus there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.
delete ransomware virus registries step 1

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.
delete ransomware virus registries step 2

3. You can remove the value of the virus by right-clicking on it and removing it.
delete ransomware virus registries step 3 Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Boot Your PC In Safe Mode to isolate and remove Nobu virus


Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows Key + R.
remove ransomware in safe mode step 1

2. The "Run" Window will appear. In it, type "msconfig" and click OK.
remove ransomware in safe mode step 2

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
remove ransomware in safe mode step 3
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

4. When prompted, click on "Restart" to go into Safe Mode.
remove ransomware in safe mode step 4

5. You can recognise Safe Mode by the words written on the corners of your screen.
remove ransomware in safe mode step 5

Step 5: Try to Restore Files Encrypted by Nobu virus.

Method 1: Use STOP Decrypter by Emsisoft.

Not all variants of this ransomware can be decrypted for free, but we have added the decryptor used by researchers that is often updated with the variants which become eventually decrypted. You can try and decrypt your files using the instructions below, but if they do not work, then unfortunately your variant of the ransomware virus is not decryptable.

Follow the instructions below to use the Emsisoft decrypter and decrypt your files for free. You can download the Emsisoft decryption tool linked here and then follow the steps provided below:

1 Right-click on the decrypter and click on Run as Administrator as shown below:

stop ransomware decryptor step 1

2. Agree with the license terms:

stop ransomware decryptor step 2

3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:

stop ransomware decryptor step 3

4. Click on "Decrypt" and wait for your files to be decoded.

stop ransomware decryptor step 4

Note: Credit for the decryptor goes to Emsisoft researchers who have made the breakthrough with this virus.

Method 2: Use data recovery software

Ransomware infections and Nobu virus aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the recommended Data Recovery software by clicking on the link underneath:

Simply click on the link and on the website menus on the top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

Nobu virus-FAQ

What is Nobu virus Ransomware?

Nobu virus is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files. 

Many ransomware viruses use sophisticated encryption algorithms to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

What Does Nobu virus Ransomware Do?

Ransomware in general is a malicious software that is designed to block access to your computer or files until a ransom is paid.

Ransomware viruses can also damage your system, corrupt data and delete files, resulting in the permanent loss of important files.

How Does Nobu virus Infect?

Via several ways.Nobu virus Ransomware infects computers by being sent via phishing emails, containing virus attachment. This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

Another way you may become a victim of Nobu virus is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to Open .Nobu virus files?

You can't without a decryptor. At this point, the .Nobu virus files are encrypted. You can only open them once they are decrypted using a specific decryption key for the particular algorithm.

What to Do If a Decryptor Does Not Work?

Do not panic, and backup the files. If a decryptor did not decrypt your .Nobu virus files successfully, then do not despair, because this virus is still new.

Can I Restore ".Nobu virus" Files?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Nobu virus files. 

These methods are in no way 100% guaranteed that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How To Get Rid of Nobu virus Virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti-malware program.

It will scan for and locate Nobu virus ransomware and then remove it without causing any additional harm to your important .Nobu virus files.

Can I Report Ransomware to Authorities?

In case your computer got infected with a ransomware infection, you can report it to the local Police departments. It can help authorities worldwide track and determine the perpetrators behind the virus that has infected your computer.

Below, we have prepared a list with government websites, where you can file a report in case you are a victim of a cybercrime:

Cyber-security authorities, responsible for handling ransomware attack reports in different regions all over the world:

Germany - Offizielles Portal der deutschen Polizei

United States - IC3 Internet Crime Complaint Centre

United Kingdom - Action Fraud Police

France - Ministère de l'Intérieur

Italy - Polizia Di Stato

Spain - Policía Nacional

Netherlands - Politie

Poland - Policja

Portugal - Polícia Judiciária

Greece - Cyber Crime Unit (Hellenic Police)

India - Mumbai Police - CyberCrime Investigation Cell

Australia - Australian High Tech Crime Center

Reports may be responded to in different timeframes, depending on your local authorities.

Can You Stop Ransomware from Encrypting Your Files?

Yes, you can prevent ransomware. The best way to do this is to ensure your computer system is updated with the latest security patches, use a reputable anti-malware program and firewall, backup your important files frequently, and avoid clicking on malicious links or downloading unknown files.

Can Nobu virus Ransomware Steal Your Data?

Yes, in most cases ransomware will steal your information. It is a form of malware that steals data from a user's computer, encrypts it, and then demands a ransom in order to decrypt it.

In many cases, the malware authors or attackers will threaten to delete the data or publish it online unless the ransom is paid.

Can Ransomware Infect WiFi?

Yes, ransomware can infect WiFi networks, as malicious actors can use it to gain control of the network, steal confidential data, and lock out users. If a ransomware attack is successful, it could lead to a loss of service and/or data, and in some cases, financial losses.

Should I Pay Ransomware?

No, you should not pay ransomware extortionists. Paying them only encourages criminals and does not guarantee that the files or data will be restored. The better approach is to have a secure backup of important data and be vigilant about security in the first place.

What Happens If I Don't Pay Ransom?

If you don't pay the ransom, the hackers may still have access to your computer, data, or files and may continue to threaten to expose or delete them, or even use them to commit cybercrimes. In some cases, they may even continue to demand additional ransom payments.

Can a Ransomware Attack Be Detected?

Yes, ransomware can be detected. Anti-malware software and other advanced security tools can detect ransomware and alert the user when it is present on a machine.

It is important to stay up-to-date on the latest security measures and to keep security software updated to ensure ransomware can be detected and prevented.

Do Ransomware Criminals Get Caught?

Yes, ransomware criminals do get caught. Law enforcement agencies, such as the FBI, Interpol and others have been successful in tracking down and prosecuting ransomware criminals in the US and other countries. As ransomware threats continue to increase, so does the enforcement activity.

About the Nobu virus Research

The content we publish on SensorsTechForum.com, this Nobu virus how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific malware and restore your encrypted files.

How did we conduct the research on this ransomware?

Our research is based on an independent investigation. We are in contact with independent security researchers, and as such, we receive daily updates on the latest malware and ransomware definitions.

Furthermore, the research behind the Nobu virus ransomware threat is backed with VirusTotal and the NoMoreRansom project.

To better understand the ransomware threat, please refer to the following articles which provide knowledgeable details.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

  • Always check "About Us" web page.
  • Profile of the content creator.
  • Make sure that real people are behind the site and not fake names and profiles.
  • Verify Facebook, LinkedIn and Twitter personal profiles.

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