How to remove Nztt Ransomware and decrypt .nztt files

What is Nztt Ransomware

Nztt Ransomware is a dangerous malware variant belonging to the STOP/Djvu family. Once installed, Nztt encrypts files using a strong encryption algorithm and appends the .nztt extension to the filenames. For example, a file named 1.jpg would become 1.jpg.nztt. The ransomware then generates a ransom note as a text file. Nztt Ransomware targets various file types, including images, videos, audio, documents, and databases. It uses a powerful encryption algorithm to lock files and make them inaccessible without a decryption key. The primary motive of the creators is to extort money from users in return for the decryption tool. The ransom note found within the _readme.txt file informs victims that decrypting files relies on specialized decryption software and a unique key. It also provides instructions on how to use the file encryption method and recover access to the encrypted data. The ransom demanded by the cybercriminals ranges from $490 to $980 in Bitcoin. Here is how it looks:

Decrypting Nztt ransomware files is a long and complex process that requires disconnecting the infected computer from the Internet and identifying the specific ransomware variant that has encrypted the data. There are currently no known free decryption tools available for Nztt Ransomware. However, some experts are still working on finding a recovery solution for the encrypted files. Using file recovery software might help recover some of the encrypted files. One such reputable file recovery software is Stellar Data Recovery Professional. Although it cannot guarantee recovery from all types of ransomware, it is worth trying as a first attempt to retrieve data once infected.

How Nztt Ransomware infected your computer

Nztt Ransomware infects computers through various channels, including spam emails, malicious program installers, suspicious ads, and hacked websites. Spam emails often contain infected attachments disguised as important documents, such as invoices, bank documents, or plane tickets. These attachments appear convincing to users, and once downloaded and executed, a drive-by download occurs, infecting the computer with ransomware. Additionally, Nztt Ransomware can be distributed using fake software cracks or key generatorsTo protect your computer from Nztt Ransomware and similar threats, it is essential to maintain up-to-date antivirus software, avoid downloading or running suspicious files, and be cautious when opening emails from unknown sources. Regularly backing up your data can also help minimize the impact of a ransomware attack.

1. Download Nztt Ransomware Removal Tool
2. Get decryption tool for .nztt 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. Restore media files with Media Repair
7. How to protect from threats like Nztt Ransomware

Virus modifies “hosts” file to block Windows updates, downloading antivirus programs, and visiting sites related to security news or offering security solutions. Nztt Ransomware comes along with AZORult trojan, which was initially created to steal logins and passwords. The process of infection also looks like installing Windows updates, the malware shows a fake window, that mimics the update process.

It uses rdpclip.exe to replace a legal Windows file and to launch an attack on a computer network. After encrypting the files, the encrypter is deleted using the delself.bat command file. Nztt Ransomware virus is propagated via spam attack with malicious e-mail attachments and using manual PC hacking. Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged, and infected installers. The virus assigns a certain ID to the victims, which is used to name those files and supposedly to send a decryption key. Great tools to protect against Nztt Ransomware are: Emsisoft Anti-Malware and Malwarebytes Anti-Malware.

How to remove Nztt Ransomware manually

It is not recommended to remove Nztt Ransomware manually, for safer solution use Removal Tools instead.

Nztt Ransomware files:

_readme.txt
rdpclip.exe
delself.bat
{randomname}.exe

Nztt Ransomware registry keys:

no information

How to decrypt and restore .nztt files

Use automated decryptors

Download STOP Djvu Decryptor from EmsiSoft (.nztt variations)

IMPORTANT: Read this detailed guide on using STOP Djvu Decryptor to avoid file corruption and time wasting.

STOP Djvu Decryptor is able to decrypt .nztt files, encrypted by Nztt Ransomware. This tool was developed by EmsiSoft. It works in automatic mode, but in most cases works only for files encrypted with offline keys. Download it here:

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 .nztt files by uploading samples to Dr. Web Ransomware Decryption Service. Analysis of 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 Nztt Ransomware and removed it from your computer, you can try decrypting 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 .nztt 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 is no items in the list choose 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 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.

Use Media Repair to decrypt media files encrypted with .nztt

1. Download Media Repair tool.
2. Right-click on the downloaded archive, and select Extract to Media_Repair\.
3. Then double-click on the extracted .exe file to launch the utility.
4. At first, you have to choose which file type you want to decrypt. You can do it from the drop-down menu in the utility.
5. Next, browser the folder with encrypted or reference files. Choose any of them and click on the Test icon located in the top right corner.
6. Media Repair will display a pop-up message with information on whether it can repair the selected file or not.
7. After checking if it is possible or not, select your reference file and click on the icon right under the Test button we used in step #5.
8. If the file pair is properly matched, you can move on and hit the Play button to start repairing. You can also stop the process anytime by clicking on the Stop button.

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

1. Get special anti-ransomware software

Use G-DATA STOP/Djvu vaccine

G DATA has released a vaccine to block STOP/DJVU ransomware from encrypting victims’ files after infection. The vaccine prevents the ransomware from encrypting files anymore, but it does not prevent the infection itself. The vaccine is available on GitHub. Download it below:

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. Nztt 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.