What is Mmdt Ransomware

Mmdt Ransomware is a recent virus developed by the STOP/Djvu ransomware family. This group of developers has developed hundreds of ransomware infections designed to render personal data inaccessible and blackmail victims into paying the ransom. Mmdt is not an exception as well. During encryption, it renames files with the .mmdt so that a sample like 1.pdf will be changed to 1.pdf.mmdt and reset its original icon. Immediately after this, the virus creates a text note called _readme.txt (example in the text box below), which contains file-decryption instructions. Currently, there are only few methods to decrypt data encrypted by Mmdt Ransomware and chances are quite low. We provide all information in this tutorial.

STOP Ransomware (.mmdt extensions)
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.
Reserve e-mail address to contact us:
Your personal ID:
{alphanumeric sequence}

As said in the instructions, victims have only one feasible way of returning their data – by purchasing a special decryption tool along with a key. The original price is 980$, however, cybercriminals stimulate victims to make a faster decision by offering a limited 50% discount (within 72 hours). To establish further negotiations on returning the data, victims are guided to contact swindlers via one of the e-mails attached to the note. We now have to warn you that paying the ransom is not a 100% guaranteed solution. Yes, cybercriminals are best capable of decrypting your files, however, nobody can give guarantees that they will keep their promise eventually. Although ransomware developed by STOP/Djvu uses strong AES (sometimes RSA) algorithms, it may still be possible to approach successful decryption of some ransomware versions. Feasible tools and instructions can be found in our guide below. Also, if you have backup copies stored on another external or cloud storage, you can use them to recover your data quite easily. Note that deleting the virus will not unlock access to data, but it is important to do it to prevent ransomware from continuing its further operation.

mmdt ransomware

How Mmdt Ransomware infected your computer

Infections of such tend to engage a number of different channels to overarch a bigger number of victims. Trojans, e-mail spam letters, backdoors, keyloggers, fake software updates/installers, phishing techniques, NAS vulnerabilities, and other similar vectors can be abused to deliver various malware. E-mail spam letters are usually fake messages disguised as something legitimate or urgent. Their purpose is to deceive users into opening malicious attachments or links that install infections. “DHL delivery notifications”, “Lottery winnings”, “Bank statements”, etc. can be fake and designed to fool inexperienced or naive users. Be careful and do not click on .DOCX; .PDF; .XLSX; .EXE;, RAR; .ZIP; or .JS file formats in suspicious e-mail letters since they can be modified to be able to install infections. Various links should also be avoided. If you want to take more steps towards protecting yourself against such threats in the future, we recommend you read our guide below. There is lots of useful information and tools one can benefit from.

  1. Download Mmdt Ransomware Removal Tool
  2. Get decryption tool for .mmdt files
  3. Recover encrypted files with Stellar Data Recovery Professional
  4. Restore encrypted files with Windows Previous Versions
  5. Restore files with Shadow Explorer
  6. Restore media files with Media Repair
  7. How to protect from threats like Mmdt Ransomware

Virus modifies “hosts” file to block Windows updates, downloading antivirus programs, and visiting sites related to security news or offering security solutions. Mmdt Ransomware comes along with AZORult trojan, which was initially created to steal logins and passwords. The process of infection also looks like installing Windows updates, the malware shows a fake window, that mimics the update process.

fake windows update from Mmdt Ransomware

It uses rdpclip.exe to replace a legal Windows file and to launch an attack on a computer network. After encrypting the files, the encrypter is deleted using the delself.bat command file. Mmdt Ransomware virus is propagated via spam attack with malicious e-mail attachments and using manual PC hacking. Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged, and infected installers. The virus assigns a certain ID to the victims, which is used to name those files and supposedly to send a decryption key. Great tools to protect against Mmdt Ransomware are: Emsisoft Anti-Malware and Malwarebytes Anti-Malware.

Download Mmdt Ransomware Removal Tool

Download Removal Tool

To remove Mmdt Ransomware completely, we recommend you to use SpyHunter 5 from EnigmaSoft Limited. It detects and removes all files, folders, and registry keys of Mmdt Ransomware. The trial version of SpyHunter 5 offers virus scan and 1-time removal for FREE.

Alternative Removal Tool

Download Norton Antivirus

To remove Mmdt Ransomware completely, we recommend you to use Norton Antivirus from Symantec. It detects and removes all files, folders, and registry keys of Mmdt Ransomware and prevents future infections by similar viruses.

How to remove Mmdt Ransomware manually

It is not recommended to remove Mmdt Ransomware manually, for safer solution use Removal Tools instead.

Mmdt Ransomware files:


Mmdt Ransomware registry keys:

no information

How to decrypt and restore .mmdt files

Use automated decryptors

Download STOP Djvu Decryptor from EmsiSoft (.mmdt variations)

IMPORTANT: Read this detailed guide on using STOP Djvu Decryptor to avoid file corruption and time wasting.

STOP djvu ransomware decryptor from emsisoft

STOP Djvu Decryptor is able to decrypt .mmdt files, encrypted by Mmdt Ransomware. This tool was developed by EmsiSoft. It works in automatic mode, but in most cases works only for files encrypted with offline keys. Download it here:

Download STOP Djvu Decryptor

Dr.Web Rescue Pack

Famous antivirus vendor Dr. Web provides free decryption service for the owners of its products: Dr.Web Security Space or Dr.Web Enterprise Security Suite. Other users can ask for help in the decryption of .mmdt files by uploading samples to Dr. Web Ransomware Decryption Service. Analysis of files will be performed free of charge and if files are decryptable, all you need to do is purchase a 2-year license of Dr.Web Security Space worth $120 or less. Otherwise, you don’t have to pay.

If you are infected with Mmdt Ransomware and removed it from your computer, you can try decrypting your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Data Recovery Professional to restore .mmdt files

stellar data recovery professional

  1. Download Stellar Data Recovery Professional.
  2. Click Recover Data button.
  3. Select type of files you want to restore and click Next button.
  4. Choose location where you would like to restore files from and click Scan button.
  5. Preview found files, choose ones you will restore and click Recover.
Download Stellar Data Recovery Professional

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

Use Media Repair to decrypt media files encrypted with .mmdt

media repair tool

  1. Download Media Repair tool.
  2. Right-click on the downloaded archive, and select Extract to Media_Repair\.
  3. Then double-click on the extracted .exe file to launch the utility.
  4. At first, you have to choose which file type you want to decrypt. You can do it from the drop-down menu in the utility.
  5. Next, browser the folder with encrypted or reference files. Choose any of them and click on the Test icon located in the top right corner.
  6. Media Repair will display a pop-up message with information on whether it can repair the selected file or not.
  7. After checking if it is possible or not, select your reference file and click on the icon right under the Test button we used in step #5.
  8. If the file pair is properly matched, you can move on and hit the Play button to start repairing. You can also stop the process anytime by clicking on the Stop button.

How to protect computer from viruses, like Mmdt Ransomware, in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

Download ZoneAlarm Anti-Ransomware

2. Back up your files

idrive backup

As an additional way to save your files, we recommend online backup. Local storage, such as hard drives, SSDs, flash drives, or remote network storage can be instantly infected by the virus once plugged in or connected to. Mmdt Ransomware uses some techniques to exploit this. One of the best services and programs for easy automatic online backup is iDrive. It has the most profitable terms and a simple interface. You can read more about iDrive cloud backup and storage here.

Download iDrive

3. Do not open spam e-mails and protect your mailbox

mailwasher pro

Malicious attachments to spam or phishing e-mails are the most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications and provides a very high level of anti-spam protection.

Download MailWasher Pro
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