How to remove NullBulge Ransomware and decrypt your files

What is NullBulge Ransomware

NullBulge Ransomware represents a formidable new threat in the ever-evolving landscape of cybercrime, specifically targeting AI and gaming communities. Originating from the notorious LockBit family, this ransomware variant not only encrypts files but also appends a unique, random extension such as .uhei662ns to the filenames. Victims might see their files transformed from document.docx to document.docx.uhei662ns, making them inaccessible without the decryption key. NullBulge ransomware is known to employ robust encryption algorithms, typically AES-256, which ensures that the files remain locked until the ransom is paid. Additionally, the ransomware modifies the victim’s desktop wallpaper to inform them of the breach and drops a ransom note, titled [extension].README.txt, in every affected directory. This note provides instructions on how to contact the cybercriminals, including links to TOR websites for secure communication and a personal decryption ID.

Unfortunately, as of now, no free decryption tools exist for victims affected by NullBulge Ransomware, largely due to the sophisticated encryption it uses. Cybercriminals behind NullBulge insist on payment in Monero (XMR) cryptocurrency to maintain their anonymity and evade law enforcement. The ransom note often suggests decrypting a small set of files for free as a gesture of good faith to encourage payment. However, despite the allure of quick resolution through ransom payment, cybersecurity experts strongly advise against it, as there are no guarantees the criminals will honor their promise. Instead, investigators and victims are recommended to check reputable sources, such as the No More Ransom Project, for any updates on potential decryption tools. In the absence of immediate decryption solutions, restoring from a secure backup or employing file recovery tools like Recuva may be viable alternatives to regaining access to the affected files.

NullBulge Ransomware (ransom note)

NullBulge Ransomware (wallpaper)

How NullBulge Ransomware infects computers

NullBulge Ransomware primarily infiltrates computers by targeting communities involved in AI and gaming through compromised software distribution channels like GitHub and Hugging Face. Cybercriminals inject malicious code into legitimate software libraries, leading unsuspecting users to download and install the infected software. Other common infection vectors include exploiting software vulnerabilities, malicious email attachments, and deceptive advertisements. Once inside the system, NullBulge encrypts files and appends a unique extension, making data inaccessible without the decryption key held by the attackers. To mitigate the risk of infection, users should regularly update their software, avoid downloading files from unverified sources, and employ robust antivirus solutions.

1. Download NullBulge Ransomware Removal Tool
2. Get decryption tool for encrypted files
3. Recover encrypted files with Stellar Data Recovery Professional
4. Restore encrypted files with Windows Previous Versions
5. Restore files with Shadow Explorer
6. How to protect from threats like NullBulge Ransomware

NullBulge Ransomware files:


[extension].README.txt
{randomname}.exe


NullBulge Ransomware registry keys:

no information

How to decrypt and restore encrypted files

Use automated decryptors

Download Kaspersky RakhniDecryptor

Use following tool from Kaspersky called Rakhni Decryptor, that can decrypt encrypted files. Download it here:

There is no purpose to pay the ransom because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of encrypted files by uploading samples to Dr. Web Ransomware Decryption Service. Analyzing files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with NullBulge Ransomware and removed from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore encrypted files

1. Download Stellar Data Recovery Professional.
2. Click Recover Data button.
3. Select type of files you want to restore and click Next button.
4. Choose location where you would like to restore files from and click Scan button.
5. Preview found files, choose ones you will restore and click Recover.

Using Windows Previous Versions option:

1. Right-click on infected file and choose Properties.
2. Select Previous Versions tab.
3. Choose particular version of the file and click Copy.
4. To restore the selected file and replace the existing one, click on the Restore button.
5. In case there are no items in the list choose an alternative method.

Using Shadow Explorer:

1. Download Shadow Explorer program.
2. Run it, and you will see screen listing of all the drives and the dates that shadow copy was created.
3. Select the drive and date that you want to restore from.
4. Right-click on a folder name and select Export.
5. In case there are no other dates in the list, choose an alternative method.

If you are using Dropbox:

1. Login to the Dropbox website and go to the folder that contains encrypted files.
2. Right-click on the encrypted file and select Previous Versions.
3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses, like NullBulge Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

ZoneAlarm Anti-Ransomware Dashboard

ZoneAlarm Anti-Ransomware Alert

ZoneAlarm Anti-Ransomware Blocked

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

2. Back up your files

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. NullBulge Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

3. Do not open spam e-mails and protect your mailbox

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.