MMDT Virus (.mmdt File) Ransomware — Remove & Decrypt Files

If you cannot open your pics, documents, or files and see the .mmdt extension on them, your system is definitely infected with Mmdt ransomware. It belongs to STOP/Djvu ransomware family

Mmdt ransomware encrypts personal documents located on the victim’s computer with the extension “.mmdt” and then generates the ransom note in each folder which contains encrypted files. The instructions are put on the victim’s PC in the “readme.txt” file. Its task is basically comparable to other representatives of the same family: Mmvb, Mmpu, Oovb.

What is Mmdt Ransomware?

NameMmdt Virus
Ransomware family1DJVU/STOP2 ransomware
Ransomware note_readme.txt
RansomFrom $490 to $980,
SymptomsThe images, videos, and other documents have the “.mmdt” extension and cannot be opened by any programs
Fix Tool Trojan Killer – ransomware infections tool. 14-day free trial.

Mmdt is file-encrypting ransomware that prevents regular access to your text files, Excel tables, videos and pics by encrypting them. It marks the ciphered files with the “.mmdt” extension. Then Mmdt ransomware adds a ransom note (readme.txt) to each folder. In this note, you can see the guidance to pay the ransom ($490-$980 in Bitcoin) to a certain Bitcoin wallet. The AES-256 or RSA-1028 cipher it utilizes to cipher the files is not decryptable with contemporary computers. Even quantum computers that currently exist will spend hundreds of years to find the decryption key.

How dangerous is the Mmdt ransomware?

When Mmdt ransomware gets on your computer, it will examine your computer for images, videos, and also important documents. It encrypt] all widespread file formats- .psd, .doc, .docx, .xls, .xlsx, .pdf, .jpeg, .png, et cetera. When these files are found, the ransomware will encrypt them and also change their extension to “.mmdt” so that you understand what happened.

After the Mmdt ransomware ciphered the files on your PC, it will drop the last “readme.txt” file on the main screen. Besides the ransom payment instructions, the victims also see the emails to contact the cybercriminals – and

Here is the ransom note that the Mmdt ransomware shows to its victims:


Don't worry, you can return all your files!
All your files like pictures, 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:

How did the Mmdt ransomware get on my computer?

The Mmdt ransomware spreads by posting websites to get hacked programs or games. They keep their eye on all hype topics which can be used to spread ransomware. New games releases, new popular films – Mmdt creators make everything to get their victims on that. Some of the most common tactics these criminals use is one-day sites with torrent downloading links. Nonetheless, pursuing the modern-day trends is not the single way these criminals use. Ways that have already turned into standard, such as e-mail spamming, are likewise usual for STOP/Djvu ransomware spreading.

Malicious email spam
The example of email spamming that may lead to Mmdt ransomware injection

Preventing this ransomware does not require a lot of initiative. Considering the standard principles of computer hygiene will substantially reduce all risks. Remember that starting all documents you get on e-mail is not a great habit. Even worse situation is to enable macros in Microsoft Office files. However, it is better to avoid the malware attack at the moment when you have only opened the email message. Examining the sender’s address can point out a lot about what you can expect, and also when you see the thing like “”– it is likely a genuine e-mail. On the other hand, stuff that tries to look similar to Amazon or FedEx shipment alert, however, uses the e-mail address of “”– must make you be on the alarm. Above, you can see the illustration of such a message.

Illegal sources of various digital things need some additional description. Violating copyright policy already exposes you to the chance of being fined. However, utilizing torrent trackers or third-party websites to download “free” programs also exposes you to different malware. No one can control undisclosed individuals who launch the torrent seeding or release the hacked program version on the site with pirated software.

Mmdt virus removal instructions.

Download Trojan Killer Portable

Trojan Killer Portable Download

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This guide below shows how to use Trojan Killer Portable3 for Mmdt virus detection and removal:

  • STEP 1. Download and install Trojan Killer.

  • STEP 2. Click on "Finish".

  • STEP 3. Wait until necessary updates are downloaded and installed.

  • STEP 4. Select computer scan type.

  • STEP 5. The software will begin scanning your computer.

  • STEP 6. Click on "Cure PC".

Restore the files encrypted by the Mmdt ransomware

In most cases, it’s impossible to recover the files encrypted by the Mmdt ransomware because the private key needed to unlock the encrypted files is only available through cybercriminals. However, we’ve listed one option you can use to recover your files below.

Warning! Make sure you remove the ransomware from your system first, otherwise, it will repeatedly encrypt your files.

If your files were encrypted with an offline key, there is a chance you can recover them by using Emsisoft Decryptor for the STOP/Djvu decryption tool. Follow the below guide to recover your files using the Emsisoft Decryptor for STOP/Djvu.

  1. You can download Emsisoft Decryptor for STOP Djvu by clicking this link.
  2. When the decryptor has finished downloading, double-click on “decrypt_STOPDjvu.exe” to run this program on your computer.
  3. Click the “Decrypt” button to start the decryption process for Mmdt files. The screen will switch to a status view, informing you about your files’ current process and decryption status.
  4. The decryptor will inform you once the decryption process will be finished. If you require the report for your records, you can save it by clicking the “Save log” button.

If the Emsisoft Decryptor can’t decrypt your .mmdt files and you do not plan on paying the ransom, it is advised that you make an image of the encrypted drives so that you can decrypt them in the future.

Your computer should now be free of the Mmdt ransomware infection. However, suppose your current antivirus allowed this malicious program on your computer. In that case, you might want to consider purchasing the full-featured version of Trojan Killer to protect against these types of threats in the future.

MMDT Ransomware — How To Remove Virus & Decrypt Files?

Name: MMDT Virus

Description: MMDT Virus is a STOP/DJVU family of ransomware-type virus. It encrypts files, video, photos, documents. Encrypted files can be tracked by a specific mmdt extension. MMDT ransomware asks victims for a ransom fee about $490 - $980 in Bitcoin.

Offer price: 480

Currency: $

Operating System: Windows

Application Category: Virus

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About William Reddy

I am from Ireland. My parents bought me a computer when I was 11, and several months after I have got a virus on this PC. I decided to enter the INSA Centre Val de Loire university after being graduated from the school. This French educational institution was offering a brand-new cybersecurity course. After getting the master's degree in cybersecurity, I've started working as a virus analyst in a little anti-malware vendor.