What Is Nuhb Virus?
Nuhb virus is a file-encryption ransomware, belonging to a large scale operation, there is also known as the Djvu viruses. This particular threat aims to get inside your computer silently and then use encryption on your files, leaving them with the .Nuhb extension and no longer able to be opened. The virus then leaves behind a ransom note, that is also known as _readme.txt and aims to give the victim information how they can be a large sum of money in the form of Bitcoin as a ransom payoff to the criminals behind this threat.
Read this article if you want to understand more details on how you can get rid of this infection and try to fix your files and make them working again.
Nuhb Virus Summary
| Name | Nuhb virus, also known as UDS:Trojan.Win32.Chapak.gen, Ransom:Win32/StopCrypt.KM!MTB, Win32:PWSX-gen [Trj], Win32:PWSX-gen [Trj], A Variant Of Win32/GenKryptik.FHJB – more detections of this virus on VirusTotal |
| File Extension | .Nuhb |
| 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 Nuhb Virus ransomware will encrypt your files by appending the .Nuhb extension to them. |
| Ransom Demanding Note | _readme.txt |
| Distribution Method | Spam Emails, Email Attachments |
| Detection Tool |
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Nuhb Virus – How Did I Get Infected?
Nuhb virus is the type of ransom ware infection, that has a lot of similarities to some other recently detected versions of this family, like .hajd, .qall and .ghas.
This particular threat can cause an infection via one of the following methods:
- If downloaded from some shady third-party software download site.
- If you have received it in the form of an e-mail attachment or a URL in your e-mail inbox.
If this virus is sent to you in the form of the file that is attached in some kind of an email, then it could exist in the form of the following important documents:
- Invoice files.
- Receipt documents.
- Work-related documents.
- E-Tickets of some kind (flights, train, events).
If this is the case and you download and run this document, the following infection process could take place, involving malicious macro code:
Another way this virus can cause a successful infection of your machine is in case you have downloaded some kind of an executable from a software download website, which could include the following files, that can turn out to be Nuhb virus instead:
- Patches for programs or games.
- SFX (self extracting) or regular archive files.
- Cracked applications or portable apps.
- Crack-fixes or activators for software or games.
- Keyegens or key generators.
Nuhb Virus – What Does It Do?
The Nuhb virus me silently causing infection on your computer, shortly after which it could connect to a remote IP address, from where it can download it payload files, some of which module files and situate them under different, often random names in the following Windows directories:
- %SystemDrive%
- %Local%
- %LocalLow%
- %AppData%
- %Windows%
- %Temp%
- %System%
- %system32%
The _readme.txt file is also created when this virus infect your computer. It contains the extortionists’ message on how to pay the ransom in BitCoin by contacting them via e-mail:
The Nuhb virus may also develop value entries in the Windows Registry Editor, targeting sub-keys, like the Run and RunOnce ones::
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
What Are .nuhb Files
The .nuhb virus files can not be opened, because they are encrypted and their data is changed, using a very sophisticated algorithms, also known as AES Encryption. This site for changes their data and the only way to unlock them is if you have a decryption key, which in this case it’s either online or off-line, with the latter being able to be decrypted easier.
The way this virus enciphers your files is it scans for all your folders, except the system ones and encrypts them, based on their file extensions, for example the following files:
- Files that are archives (.zip, .rar, etc).
- Various sorts of documents (.docx, .pptx, etc.).
- Audio file formats (.mp3, .wav, etc.).
- Different picture file types (.jpg, .png, .etc).
- Video file formats (.mp4, .avi, etc.).
- Other files.
After this encryption process is finished, the files are left looking like the following example shows:
Picture.jpg.nuhb
How to Remove Nuhb Virus?
In order to successfully delete the malicious files of Nuhb virus, our primary suggestion is that you follow the removal of steps that have been posted underneath this article. These steps are created with the primary idea so that they can assist you in getting rid of this nasty software either manually or automatically. If you don’t have the time or the experience to do the removal by yourself, our main suggestion is following expert advice and removing this threat automatically with the help of an anti-malware program. Such a security software has been designed mainly to get your computer skin thoroughly and get rid of any malicious thousand objects completely.
How to Decrypt .nuhb Files?
If you want to decrypt encrypted files by this a nasty infection, our main suggestion is following the STOP Ransomware Decryption Steps, instructions for which you can find on the link or in the video below. These steps include the usage of the official description to for this particular virus family, which has been designed by independent malware researchers to help the victims decrypt their files for free. If the decryptor does not work, either it has not been updated with your version yet or you have the online key version of the virus. If this is the case, then our suggestion is to try out the alternative methods for file decrypting below. They have been made with the main idea to assist you in recovering as many files as possible, that have been encoded by this virus, but you should know that they did not come at 100% guarantee of success.
Video guide for using the STOP Ransomware Decryptor:
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 Nuhb with SpyHunter Anti-Malware Tool
Ransomware Automatic Removal - Video Guide
Step 2: Uninstall Nuhb 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:
Follow the instructions above and you will successfully delete most unwanted and malicious programs.
Step 3: Clean any registries, created by Nuhb 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 Nuhb there. This can happen by following the steps underneath:
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 Nuhb
Step 5: Try to Restore Files Encrypted by Nuhb.
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:
2. Agree with the license terms:
3. Click on "Add Folder" and then add the folders where you want files decrypted as shown underneath:
4. Click on "Decrypt" and wait for your files to be decoded.
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 Nuhb 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.
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.
Nuhb-FAQ
What is Nuhb Ransomware?
Nuhb 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 Nuhb 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 Nuhb Infect?
Via several ways.Nuhb 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 Nuhb 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 .Nuhb files?
You can't without a decryptor. At this point, the .Nuhb 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 .Nuhb files successfully, then do not despair, because this virus is still new.
Can I Restore ".Nuhb" Files?
Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Nuhb 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 Nuhb 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 Nuhb ransomware and then remove it without causing any additional harm to your important .Nuhb 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 Nuhb 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 Nuhb Research
The content we publish on SensorsTechForum.com, this Nuhb 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 Nuhb 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.
Hola tengo problemas con el ranswomare de extensión .nuhb y los programas que descargue de la pagina no me desencriptaron ningún archivo. Me gustaría saber si tienen otra manera para recuperar archivos. Gracias.