Remove Mmnn Ransomware (.mmnn Decryption)

Mmnn is a ransomware, which is infecting Windows computers having intentions of blackmailing or extorting money from victims. Once Mmnn is active in the operating system, it can damage settings and cause vulnerabilities for succeeding malware attacks. Mmnn aims to extort money from their targets and they make it possible by encrypting data from computers and demanding a ransom fee in exchange for a decryption tool and private key.

Like older variants as Mool and Ooss, Mmnn operations starts by spying throughout the operating system and locating certain files where online users is most likely to store their important information. After scanning, Mmnn will encode the data using a sophisticated cipher algorithm. Infected files by Mmnn ransomware will remain inaccessible from victimized users.

Mmnn ransomware will rename the target files by adding the .mmnn extension. After that, it will drop a note to victims with a file named _readme.txt, which contains the ransom message of Mmnn hackers. It also states how to recover the corrupted files and how much would it cost for purchasing a decryption tool. Usually, Mmnn ransomware handlers will demand $980 that needs to be process on the payment method requested by attackers. Note that, some data-lockers use crypto-currencies on their transactions.

It is somewhat mysterious on how these ransomware infects computers. However, based on researches, malware can spread through mass spam emails or intrusive advertisements online. Usually, data-locker criminals tend to act as a representative from a famous company and sends emails to target victims. Using an engaging matter to caught attention of online users, ransomware like Mmnn will attach malware-infected file inside the email. The time target victims opens it, malicious software will be active on the operating system. Then, it will start to run and locate valuable information or damage vulnerable settings.

Mmnn Ransomware Virus

Mmnn developers operate just like any other ransomware spreading on computers. These types of cyber criminals always have a purpose to generate income by demanding a ransom fee from their victims. However, hackers should not be trusted. There are times that they do not comply even their demands are met.

How to Remove Mmnn Ransomware

Ransomware files are placed deeply into the system and on various locations, thus, thorough scanning is vital to totally remove Mmnn virus. Aside from our suggested tool, you may also run your own security program.

Though affected files may be impossible to decrypt due to complexity of the encryption, you can still try recovery method like alternative tool, Shadow Explorer or Previous Version as described below.

Stage 1: Scan the Computer with Anti-Malware Tool

1. Download free anti-malware scanner called MalwareBytes Anti-Malware.
Malwarebytes Anti-Malware Download Link (this will open a new window)

2. After downloading, install the program. It may run automatically or you have to double-click on the downloaded file MBSetup.exe.

3. Carry out the installation with default setup process.

4. After the installation process, click the Get Started button to launch the program.

5. Continue with the prompts until the main program opens.

6. On the main console, click on Scan to run most complete detection method to find hidden objects associated to Mmnn ransomware.

7. Scanning may take a while. Please wait until the anti-malware tool is done with the checking.


8. Once the scan has completed, the tool will display the list of detected threats. Remove all identified malicious items and restart the computer if necessary.

Stage 2: Double-check for Mmnn’s leftover with Microsoft’s Malicious Software Removal Tool

1. Download the free scanner called Malicious Software Removal Tool.
Malicious Software Removal Tool Download Link (this will open a new window)


2. The tool automatically checks the operating system and suggest appropriate download version. Click on Download button to begin. Save the file to a convenient location, preferably on Desktop.

3. After downloading the file, Windows will prompt that download has completed. Click Run to start scanning for Mmnn ransomware. Another option is to browse the location folder and double click on the file to run.


4. The tool will display Welcome screen, click Next. Please note the message “This tool is not a replacement for an antivirus product.” You must understand that this program is made specifically to find and remove malware, viruses, Trojans, and other harmful elements on the computer. It was not designed to protect the computer.


5. Next, you will see Scan Type. Please choose Full Scan to ensure that all Mmnn ransom virus entities and other harmful files left on the computer will be found and removed. For advanced computer user, you can opt for Customized Scan, if there are other drives or folders you wanted to include in this scan.


6. Full scan may take a while, please wait for Malicious Software Removal Tool to complete the tasks. However, you may cancel the scan anytime by clicking on the Cancel button.


7. After scanning, the tool will reveal all identified threats. There may be other threats that our first scan fails to detect. Please remove/delete all detected items.

8. When removal procedure is complete, you may now close Malicious Software Removal Tool. We hope that Mmnn ransomware have been completely deleted from the computer. Please restart Windows to proceed with the normal operation.

Stage 3 : Unlocking files with Mmnn Decryption Tool

Tools that may decrypt files infected by Mmnn is not yet available at this time. We will update this section once the tool is on hand. In the meantime, please try the options below.

Option 1: Windows Previous Version Tool

Windows Vista and Windows 7 have a feature called Previous Versions. However, this tool is only usable if restore point was made prior to Mmnn ransomware infection. To use this tool and recover files affected by the virus, please follow these steps:

1. Open My Computer or Windows Explorer.

2. Right-click on the affected files or folders. From the drop-down list, please click on Restore previous versions.

3. New window will open display all backup copy of files and folders you wanted to recover. Choose the appropriate file and click on Open, Copy, or Restore. Restoring selected files overwrites the current encrypted files on the computer.

Option 2: Use ShadowExplorer to restore files encrypted by Mmnn Ransomware

Just like Previous Version tool, ShadowExplorer is taking advantage of shadow copy created by Windows. This tool allows you to retrieve older version of files before it was encrypted by Mmnn ransomware.

1. Download ShadowExplorer from the official web site.

2. Install the program with the default settings.

3. The program should run automatically after installation. If not, double-click on ShadowExplorer icon.

4. You can see the drop-down list on top of the console. Please select proper drive and the most recent point-in-time shadow copies of files you wish to restore prior to Mmnn ransomware infection.


5. Right-click on the Drive, Folder, or File you wish to restore and click Export…

6. Lastly, ShadowExplorer will prompt for location where you want to save the copy of recovered files.

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