Nozelesn ransomware removal instructions
What is Nozelesn?
Discovered by MalwareHunterTeam, Nozelesn is a ransomware-type virus that stealthily infiltrates the system and encrypts most stored files. Once encrypted, data immediately becomes unusable. In addition, names of encrypted files are appended with the ".nozelesn" extension (for example, "sample.jpg" is renamed to "sample.jpg.nozelesn"). Following successful encryption, Nozelesn creates an HTML file ("HOW_FIX_NOZELESN_FILES.htm") and places a copy in every existing folder.
The new HTML file contains a message stating that data is encrypted and that the victim must pay for decryption by visiting Nozelesn's website and following the instructions. It is currently unknown whether Nozelesn uses symmetric or asymmetric cryptography. This information is not provided, however, it is certain that a unique decryption key is necessary to restore data. All keys are stored on a remote server controlled by Nozelesn's developers. Victims are encouraged to pay a ransom of .1 Bitcoin (currently equivalent to ~$635) in exchange for release of their keys. Furthermore, ransomware developers can never be trusted. Research shows that these people often ignore victims once payments are submitted. Therefore, paying typically gives no positive result and users are scammed. You are advised to ignore all requests to submit payments or contact cyber criminals. Unfortunately, there are no tools capable of cracking Nozelesn encryption and restoring data free of charge. The only solution is to restore everything from a backup.
Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:
Nozelesn is virtually identical to KRAB, Leen, Omerta, DBGer, and dozens of other ransomware-type viruses. Although these viruses are developed by different cyber criminals, their behavior is identical - all encrypt data and make ransom demands. Size of ransom and type of encryption algorithm used are usually the only major differences. Unfortunately, most employ cryptographies (RSA, AES, and others) that generate unique decryption keys. Therefore, unless the virus is still in development or has certain bugs/flaws (e.g., the key is hard-coded, stored locally or similar), file decryption manually without involvement of developers (contacting these people is not recommended) is virtually impossible. The existence of ransomware and malware is one of the main reasons why you should maintain regular data backups. Remember to store backups on an unplugged storage device (Flash drive, external hard drive or similar) or external hard drive (Cloud or other). This will prevent ransomware from encrypting backups together with regular data.
How did ransomware infect my computer?
|Threat Type||Ransomware, Crypto Virus, Files locker|
|Symptoms||Can't open files stored on your computer, previously functional files now have a different extension, for example my.docx.locked. A ransom demanding message is displayed on your desktop. Cyber criminals are asking to pay a ransom (usually in bitcoins) to unlock your files.|
|Distribution methods||Infected email attachments (macros), torrent websites, malicious ads.|
|Damage||All files are encrypted and cannot be opened without paying a ransom. Additional password stealing trojans and malware infections can be installed together with a ransomware infection.|
|Malware Removal (Windows)|
To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
How to protect yourself from ransomware infections?
Be aware that the main reasons for computer infections are poor knowledge and careless behavior. The key to safety is caution. Therefore be very cautious when browsing the Internet and downloading/installing/updating software. Think twice before opening email attachments. If the file seems irrelevant or has been received from a suspicious/unrecognizable email address, it should never be opened. Furthermore, avoid using third party download/installation tools, since they often include rogue apps. Software should be downloaded from official sources only, using direct download links. The same rule should be followed when updating software. Keep installed apps up-to-date, but use use implemented functions or tools provided by the official developer only. Having a legitimate anti-virus/anti-spyware suite installed and running is also essential. If your computer is already infected with Nozelesn, we recommend running a scan with Malwarebytes for Windows to automatically eliminate this ransomware.
Text presented in Nozelesn ransomware HTML file ("HOW_FIX_NOZELESN_FILES.htm"):
All files including videos, photos and documents on your computer are encrypted by nozelesn ransomware.
File decryption costs money.
In order to decrypt the files, you need to perform the following steps:
1. you should download and install this browser hxxp://www.torproject.org/projects/torbrowser.html.en
2. After installation, run the browser and enter the address: lyasuvlsarvrlyxz.onion
3. Follow the instruction on the web-site. We remind you that the sooner you do, the more chances are left to recover the files.
Guaranteed recovery is provided within 10 days.
You should enter the personal code on the tor site.
Your Personal CODE: -
Screenshot of Nozelesn website:
Screenshot of files encrypted by Nozelesn (".nozelesn" extension):
Nozelesn ransomware removal:
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
- What is Nozelesn?
- STEP 1. Nozelesn virus removal using safe mode with networking.
- STEP 2. Nozelesn ransomware removal using System Restore.
Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.
Video showing how to start Windows 7 in "Safe Mode with Networking":
Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.
Video showing how to start Windows 8 in "Safe Mode with Networking":
Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.
Video showing how to start Windows 10 in "Safe Mode with Networking":
Log in to the account infected with the Nozelesn virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.
If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.
Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":
1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.
2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.
3. Next, type this line: rstrui.exe and press ENTER.
4. In the opened window, click "Next".
5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the Nozelesn ransomware virus infiltrating your PC).
6. In the opened window, click "Yes".
7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining Nozelesn ransomware files.
To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of Nozelesn are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.
To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.
If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.
To protect your computer from file encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as Nozelesn ransomware.
Note that the Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites as well as Desktop folders.
Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.
HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user-intervention:
Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:
- The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information about online backup solutions and data recovery software Here.
Other tools known to remove Nozelesn ransomware: