.Fmoon Virus Removal Guide (How To Recover Files)

The .Fmoon virus also known as the MoonCrypter ransomware that encrypts system and user data with the .Fmoon extension, read our removal guide to restore your PC.

Manual Removal Guide
Recover .Fmoon Virus Files
Skip all steps and download anti-malware tool that will safely scan and clean your PC.

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How Does .Fmoon Virus Infiltrate the System?

The .Fmoon virus is distributed using the most popular ransomware spread tactics. As the malware is also known as the Moon Cryptor ransomware it can take different forms. The hackers behind it use several methods that have been noticed by the experts.

Email spam messages deliver the .Fmoon virus samples via campaigns coordinated by the hackers. Depending on the hackers they may be configured to spread the viruses under different forms:

  • Hyperlinks ‒ The email messages can contain links that lead to files containing the .Fmoon virus code.
  • Attachments ‒ The .Fmoon virus can be delivered to the messages as attachments.
  • Social Engineering Tricks ‒ The hackers behind the malware can utilize various tricks to try and make the victims infect themselves.

The hackers can also craft infected documents and software installers which are then uploaded to download sites and P2P networks such as BitTorrent. The documents contain scripts that lead to the .Fmoon virus infections. They are activated when the user opens the documents and agrees to run them via a prompt notification. Usually popular formats are hacked to include the threats. Examples include rich text documents, spreadsheets and databases.

The software installers themselves are modified instances of famous and legitimate programs that are widely used by computer users. Once the files are processed they are then distributed on hacker-controlled sites and popular P2P networks.

Web scripts and ad networks are another possible way of attaining the infection.

Infection Flow of .Fmoon Virus

The .Fmoon virus is a typical ransomware strain that is under investigation by the experts who discovered the samples. At the moment no resemblance with any of the known malware families has been established. This means that the hackers have probably made it from scratch or have used code snippets from other sources in a way that has not been detected yet.

It is also known as the MoonCryptor ransomware and it has been identified as a threat that spreads across the world. The .Fmoon virus follows the usual infection patterns that are associated with this type of threats. Upon infection it starts its encryption engine which targets sensitive system and user files. The data is encrypted with a strong cipher and renamed with the .fmoon virus. The malware uses a file list of target extensions that can be configured based on the intended targets. In most cases the criminals seek to process the most widely used files: documents, videos, photos, databases, music, configuration files, backups and etc.

When this process is complete a lockscreen is placed on the victim machine. It actively blocks any ordinary user interaction until the threat has been eliminated by a specialist anti-spyware utility.

It displays the ransomware note in application frame. The message reads the following:

Oops all your data are encrypted !!
This is a ransomware AES 256 + RS A 1024!! Look at Wikipedia for morę informations
Please pay before 20 minutes oryour datalll be lost forever. I’ll delete a file per minutę after!
Copy and past this link in Internet Explorer or Firefox :
and enter your informations :
Your UUID :
Encrypted key iBtSvjYAVWaJslcc4Hn/nMIMrg+bUgA0W4g***
If you obtain your passord, take it here and click on RECOVER
button [RECOYER]

The note is constructed based on a widely used template. It attempts to blackmail the victims into paying the criminals a fee to decrypt the compromised files. In addition it uses a time limit to further pressure the users.

We strongly recommend to disregard such scams and use a quality anti-spyware solution that can effectively remove all found active infections. Follow our removal instructions below to delete the .Fmoon virus. After this is done you can use the listed data recovery application to restore the affected data.

Remove .Fmoon Virus and Restore Data

WARNING! Manual removal of .Fmoon Virus requires being familiar with system files and registries. Removing important data accidentally can lead to permanent system damage. If you don’t feel comfortable with manual instructions, download a powerful anti-malware tool that will scan your system for malware and clean it safely for you.

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SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

.Fmoon Virus – Manual Removal Steps

Start the PC in Safe Mode with Network

This will isolate all files and objects created by the ransomware so they will be removed efficiently. The steps bellow are applicable to all Windows versions.

1. Hit the WIN Key + R

2. A Run window will appear. In it, write msconfig and then press Enter

3. A Configuration box shall appear. In it Choose the tab named Boot

4. Mark Safe Boot option and then go to Network under it to tick it too

5. Apply -> OK

Show Hidden Files

Some ransomware threats are designed to hide their malicious files in the Windows so all files stored on the system should be visible.

1. Open My Computer/This PC

2. Windows 7

    – Click on Organize button
    – Select Folder and search options
    – Select the View tab
    – Go under Hidden files and folders and mark Show hidden files and folders option

3. Windows 8/ 10

    – Open View tab
    – Mark Hidden items option

how to make hidden files visible in Windows 8 10 bestsecuritysearch instructions

4. Click Apply and then OK button

Enter Windows Task Manager and Stop Malicious Processes

1. Hit the following key combination: CTRL+SHIFT+ESC

2. Get over to Processes

3. When you find suspicious process right click on it and select Open File Location

4. Go back to Task Manager and end the malicious process. Right click on it again and choose End Process

5. Next, you should go folder where the malicious file is located and delete it

Repair Windows Registry

1. Again type simultaneously the WIN Key + R key combination

2. In the box, write regedit and hit Enter

3. Type the CTRL+ F and then write the malicious name in the search type field to locate the malicious executable

4. In case you have discovered registry keys and values related to the name, you should delete them, but be careful not to delete legitimate keys

Click for more information about Windows Registry and further repair help

Recover .Fmoon Virus Files

WARNING! All files and objects associated with .Fmoon Virus should be removed from the infected PC before any data recovery attempts. Otherwise the virus may encrypt restored files. Furthermore, a backup of all encrypted files stored on external media is highly recommendable.

DOWNLOAD .fmoon Virus Removal Tool

SpyHunter anti-malware tool will diagnose all current threats on the computer. By purchasing the full version, you will be able to remove all malware threats instantly. Additional information about SpyHunter / Help to uninstall SpyHunter

1. Use present backups

2. Use professional data recovery software

Stellar Phoenix Data Recovery – a specialist tool that can restore partitions, data, documents, photos, and 300 more file types lost during various types of incidents and corruption.

3. Using System Restore Point

    – Hit WIN Key
    – Select “Open System Restore” and follow the steps


4. Restore your personal files using File History

    – Hit WIN Key
    – Type restore your files in the search box
    – Select Restore your files with File History
    – Choose a folder or type the name of the file in the search bar
    – Hit the “Restore” button

Preventive Security Measures

  • Enable and properly configure your Firewall.
  • Install and maintain reliable anti-malware software.
  • Secure your web browser.
  • Check regularly for available software updates and apply them.
  • Disable macros in Office documents.
  • Use strong passwords.
  • Don’t open attachments or click on links unless you’re certain they’re safe.
  • Backup regularly your data.
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    Author : Martin Beltov

    Martin graduated with a degree in Publishing from Sofia University. As a cyber security enthusiast he enjoys writing about the latest threats and mechanisms of intrusion.

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