Mmnn Virus Removal Guide (+Decrypt .mmnn files)

Mmnn Virus Ransomware

Mmnn is a malicious software application functioning as common ransomware. Michael Gillespie, the well-known virus researcher, very first discovered this new name in the DJVU ransomware family.

Mmnn was developed for the sole function to encrypt all popular file types. Logically, as quickly as the encryption is effectively achieved, the users are not able to get access to them. Mmnn virus adds its own “.mmnn” to all the encrypted files. For instance, the file “price_list.xls”, when modified by Mmnn, will be entitled as “price_list.xls.mmnn”. Once the file encryption is accomplished, Mmnn puts its own unique text file (_readme.txt) into all the folders that keep the encrypted files.

The message mentioned by text file asking for the random os really comparable to the notices provided by other ransomware dangers belonging to the DJVU family. The caution generally shows that the files have been secured and the only service to get access to it is to use a special standalone key. Regretfully, this statement is definitely true.

The approach to encrypt the files used by Mmnn is not completely investigated. Nevertheless, there is no doubt that each computer system owner may be provided an unique decryption key, which is definitely special. It is very difficult to recover the data without the proper key in place.

“Don’t worry, you can return all your files!”, from text file message:

message from Mmnn virus

One more peculiarity of the Mmnn infection is that the users are not able to get access to the key. The decrypting key is hosted on a special server under the complete control by the crooks who have actually released the Mmnn infection into the world wide web. In order to acquire the key and bring back the essential information, the users are told to get in touch with the frauds via e-mail or by telegram and to pay the ransom in the amount of $980.

The message also states that individuals need to get in touch with the Mmnn authors within 72 hours upon the moment of the data encryption. The alert shows that by doing so the people will acquire a 50% discount, therefore, the ransom quantity falls to $490.

No matter what the quantity of the ransom is, we strongly recommend that you do not pay the ransom. There is no warranty that these online crooks will keep their guarantees, so they may not care at all what the victims feel about the encryption, even when the quantity of the ransom is received into their accounts. Hence, paying ransom typically does not result in a successful healing. So, the users might just lose their money for absolutely nothing.

Similarly, we advise you not to contact the frauds as they instruct. Do not transfer cash into their wallets. There are no applications that could split the Mmnn ransomware or restore the information at no charge. For that reason, the only correct choice is to restore the data from possible backups (if available).

Virus Summary

NameMmnn Ransomware
File Extensionmmnn
Short DescriptionThe ransomware encrypts all the data stored on your system and requires a ransom to be paid on your part supposedly to recover your important files.
SymptomsFile encryption by the ransomware is performed by means of the AES-256 algorithm (CFB mode) encryption algorithm. Once the encryption is completed, the ransomware adds its special .mmnn extension to all the files modified by it.
Distribution MethodAdware bundles and software cracks
Similar InfectionsRooe, Bboo, Alka
Removal Tool   GridinSoft Anti-Malware

Do not forget that the Web is now full of infections similar to the Mmnn ransomware. For example, this specific risk is generally identical to Brusaf and other ransomware-type infections. These damaging energies have actually been developed in order to secure the crucial information and express the demand for the users to pay the ransom. All these infections use the identical algorithm to generate the particular key for effective data decryption.

Unless the Mmnn ransomware is still under the development process or has actually got some concealed bugs, it is not possible to restore the data manually. Therefore, the only working solution to avoid the loss of your crucial data is to frequently preserve updated backups of all your essential documents.

Another essential piece of advice is to store the backups on unique storage not linked to your primary device. For instance, you might keep it on the USB Flash Drive, or some external hard disk drive, or by using the cloud data storage services. Keeping the backups on your regular drive is really dangerous, given that the backup may also be secured by the Mmnn .

Leaks for the Mmnn ransomware attack.

Mmnn utilizes many paths to infiltrate the vulnerable computer systems. It is not particular what particular technique was used in your case, however, the invasion might take place by means of the following channels:

  • bundling with third-party programs, mainly freeware;
  • spam emails from the unidentified senders;
  • websites providing complimentary hosting;
  • P2P (peer-to-peer) torrent software.

There are times when the Mmnn virus may camouflage itself as some genuine application, for example, through the deceptive notifies demanding setup of some software update. This is the most typical trick used by the scams to inject the Mmnn ransomware files into the system. In this manner users partially take part in its setup, without plainly understanding the danger.

In addition, the scams might send out unsolicited spam e-mail with challenging informs motivating the people to open suspicious attachments or click some download links, for instance, those encouraging the people to open particular photos, text files, tax documents and other information.

No doubt, opening these files or clicking on the malicious links may essentially damage the system. Fake Media Player upgrade notifications may cause the Mmnn ransomware infiltration. Similarly, downloading the split software application may furthermore consist of the ransomware installer. The last however not the least, installation of Mmnn might take place through some Trojan horses that might be set up stealthily into the system and without the user’s direct authorization and even approval.

Avoiding the Mmnn attack.

Naturally, there is no outright guarantee that your computer will be always free of any malware attacks, however, we want to share some beneficial pointers with you to make it safer. Ensure to pay really attention while searching the web and particularly while getting cost-free programs. Do not open any dubious email accessories, particularly if the sender is not understood to you.

Do not forget that certain freeware installer may likewise contain some other extra apps in the bundle. These additional applications might be extremely harmful. It is of utmost importance to keep your anti-virus software application and your os in basic to be always correctly upgraded.

It is quite sensible that downloading pirated software is illegal, nevertheless, in addition, such unapproved apps usage might likewise bring major damage to your system. Thus, do not download any split programs. Plus, the truth that your existing anti-virus did not protect the system from the Mmnn ransomware is a great reason for you to reassess your options and change to another program that can render the securing functions on a far better level.

Below please find the quotation from the Mmnn text file:

 Don't worry, you can return all your files!
 All your files like photos, databases, documents and other important are encrypted with strongest encryption and unique key.
 The only method of recovering files is to purchase decrypt tool and unique key for you.
 This software will decrypt all your encrypted files.
 What guarantees you have?
 You can send one of your encrypted file from your PC and we decrypt it for free.
 But we can decrypt only 1 file for free. File must not contain valuable information.
 You can get and look video overview decrypt tool:
 Price of private key and decrypt software is $980.
 Discount 50% available if you contact us first 72 hours, that's price for you is $490.
 Please note that you'll never restore your data without payment.
 Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours.
 To get this software you need write on our e-mail:
 Reserve e-mail address to contact us: 

 Our Telegram account:

Screenshot of files with “.mmnn” extension added by the virus:”

Mmnn Ransomware - encrypt files with .mmnn extension

Use GridinSoft Anti-Malware to remove Mmnn ransomware from your computer

1.Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

  GridinSoft Anti-Malware

2. Double-click on the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-ag.exe file to install GridinSoft Anti-Malware on your computer.
GridinSoft Anti-Malware
An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.
GridinSoft Anti-Malware Setup

3. Press Install button for run GridinSoft Anti-Malware.

GridinSoft Anti-Malware Install

3.Once installed, GridinSoft Anti-Malware will automatically run.

GridinSoft Anti-Malware  Start

4. Wait for the GridinSoft Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your computer for Win Speedup 2018 and other malicious programs. This process can take a 20-30 minutes, so we suggest you periodically check on the status of the scan process.
GridinSoft Anti-Malware Scan

5. Click on “Clean Now”.

When the scan has completed, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.
GridinSoft Anti-Malware Scan Result

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About Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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