Mztu Virus

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*Mztu is a variant of Stop/DJVU. Source of claim SH can remove it.

Mztu

Mztu is a cryptovirus infection based on Ransomware code. The purpose of Mztu is to sneak inside a computer without being detected and encrypt the files stored there in order to demand a ransom for their decryption.

Moqs
The Mztu virus file ransom note

It is of utmost importance to remove the Ransomware infection if you want to be able to use the infected computer normally and bring it back under your command. Therefore, on this page, we will share our tested and comprehensive measures with the help of which to completely remove Mztu from your system. You are also likely interested in learning how to get your data back and that’s why the guide below will take you through a file-recovery process that can potentially help you get back some of your most needed digital documents.

The Mztu virus

The Mztu virus is a Ransomware threat capable of taking hostage your digital information that’s stored on the computer. The Mztu virus does that by secretly encrypting the most valuable user files and demanding a ransom for their decryption.

The Ransomware does not corrupt your system or perform malicious activities that other viruses do, such as spying, collecting data, or deleting files. Instead, it uses a strong encryption algorithm that converts the information stored on the infected device into an unreadable string of symbols that can’t be recognized by any software. In this way, the infection renders all coded documents unreadable and prevents the users from accessing them. 

Normally, the contamination with Ransomware happens when users interact with harmful online content or download and install infected software. Possible carriers of threats like Mztu, MzqwMzop could be spam emails, attachments to random messages, infected links, torrents, and sites with low reputation. Generally, the moment of the infection and the entire file-encryption process go unnoticed until the Ransomware shows itself on the victim’s computer with a ransom note.

The Mztu file decryption

The Mztu file decryption is a process that is supposed to bring all encrypted files back to their previous state. To activate the Mztu file decryption process, the victims need to purchase a decryption key from the hackers behind the Ransomware.

Mztu Virus 1024x713
The Mztu virus will encrypt your files

Direct decryption of the Mztu files is only possible after the application of a special decryption key.  Sadly, the crooks who control the Mztu infection will keep this key in secret and would only exchange it for a money transfer payable in Bitcoins. Very often the attackers threaten to destroy the decryption key unless the payment is made on time. They may also threaten to double the ransom to get the victims to pay more quickly. You should realize, though, that these are deceptive methods used by cyber criminals to make their targets act impulsively. Besides, the cyber criminals don’t really care about your documents and there’s nothing that can make them give you the key they promised once they receive the payment.

Therefore, most security experts will warn you not to pay a cent to these crooks. Instead, many professionals, including our “How to remove” team, will encourage the attacked victims to remove the Ransomware and to try to recover their data from backups whenever that is possible. These could be personal backups (on an external drive or a cloud) or system backups that could be extracted from the system. More details can be found in the removal guide below, so follow the steps closely and let us know if they have been helpful.

SUMMARY:

Name Mztu
Type Ransomware
Detection Tool

anti-malware offerOFFER Read more details in the first ad on this page, EULA, Privacy Policy, and full terms for Free Remover.

*Mztu is a variant of Stop/DJVU. Source of claim SH can remove it.

Remove Mztu Ransomware


Step1

Next, since Mztu may run a number of malicious processes as a background, it is best if you run only the most essential system processes and apps in order to be able to easily spot the malicious ones. For this, we advise you to reboot the infected PC in Safe Mode (use the free instructions from the link) and then get back to this removal guide by clicking on its bookmark.

Step2

WARNING! READ CAREFULLY BEFORE PROCEEDING!

*Mztu is a variant of Stop/DJVU. Source of claim SH can remove it.

With the infected computer launched in Safe Mode, click on the Start menu button and type msconfig in the search bar. Then open the result and a System Configuration window will open:

msconfig_opt

If you detect anything suspicious, research it online and, based on the information you collect, decide whether you need to disable it.

To disable a suspicious startup entry, remove its checkmark from the related checkbox and click OK.

Next, head to the Windows Task Manager (CTRL + SHIFT + ESC) and select the Processes Tab. Similarly to what you did in the Startup tab, search the list of processes for suspicious entries. Keep in mind that Mztu may hide its malicious processes under different names that may mimic the names of legitimate processes. If you detect an entry that looks suspicious, (uses a lot of CPU and Memory without any particular reason, has an odd name, etc.) here is how to check it:

  • right-click on the process in question
  • select Open File Location
malware-start-taskbar
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    • end the processes in question if one or more of its files get flagged as dangerous.  

     

    Step3

     

    A typical location where a ransomware like Mztu may make unauthorized changes is the Hosts file of the infected computer. To check it, you need to copy the line below in the Start menu search bar and press Enter:

    notepad %windir%/system32/Drivers/etc/hosts

    The Hosts file will open in Notepad.

    Search for Localhost in the text, and if you find it, check if any virus creator IP addresses have been added there. The image below can give you an idea of how should those IPs look like.  

    hosts_opt (1)

    If you detect nothing suspicious in your Hosts file, just close it down. If something disturbing catches your attention, though, don’t rush to delete it. Better write to us in the comments with a copy of what is bothering you.

    Step4

     

     

    In case of a ransomware infection, you may need to clean the Registry from malicious entries that the virus has added there. To do that, type Regedit in the Start menu search bar and press Enter

    This will launch the Registry Editor on your screen. Next, press CTRL and F together and type the Name of the virus that has infected you and start a search. If any entries show up in the results, they most likely are linked to the ransomware and need to be removed from the Registry. 

    NB!!! A serious system damage may occur if you delete entries nor elated to the ransomware from your registry. To avoid the risk of OS corruption, please use a professional removal tool to clean your registry from malicious files.

    Next, close the Registry Editor once you are sure the Registry is clean from malicious entries and click on the Start menu button. In the search field, type each of the lines below one by one and open the result:

    1. %AppData%
    2. %LocalAppData%
    3. %ProgramData%
    4. %WinDir%
    5. %Temp%

    In case you detect entries with odd names consisting random characters, or entries that have been added close to the time you got infected with Mztu , they most likely need to be removed.

    You also need to remove all the files in the Temp folder, as these are temporary files that could be related to the ransomware.

    Step5

     

    How to Decrypt Mztu files

    Once your computer is clean from Mztu and you are sure that there are no ransomware traces in it, you can check our comprehensive guide with file-recovery suggestions that can be found here.

    New Djvu Ransomware

    The latest Djvu ransomware variant, known as STOP Djvu, is easily identifiable thanks to the .Mztu extension appended to the victims’ encrypted files. As of this writing, it is possible to decode files encrypted with this version if they were encrypted with an offline key. If you need assistance decrypting files, try the application at the following link:

    Decryption tool

    If you click the Download button at the top of the page, you’ll be able to save the STOPDjvu.exe decryptor on your computer. Right-click on the file, and select “Run as Administrator” to launch the decryptor. Decrypting your data should start as soon as you’ve read the license agreement and completed the brief setup process. Keep in mind that if a file was encrypted using an unknown offline key or if it was encrypted online, this tool may not be able to decode it.

    However, before attempting any data recovery methods, you should check that the ransomware has been completely eradicated. It is recommended that you scan your computer with a specialized anti-virus software, such as the one we offer here on our site. You can also check individual files with the free online virus scanner. If you have any concerns regarding any of the steps in this guide, feel free to post them in the comments below and a member of our team will reply to you shortly.

     
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    About the author

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    Lidia Howler

    Lidia is a web content creator with years of experience in the cyber-security sector. She helps readers with articles on malware removal and online security. Her strive for simplicity and well-researched information provides users with easy-to-follow It-related tips and step-by-step tutorials.

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