Mztu ransomware – a dangerous computer virus that can leave you without access to your files

Mztu is a destructive computer virus that can lock down all of your personal documents, videos, pictures, databases, and more with its RSA encryption algorithm. This complex code is difficult to break without the decryption key located on cybercriminals’ servers – making it practically impossible for you to reclaim access to your data.
By adding a .mztu extension to files and removing the original icons, victims of this virus are left with documents that can no longer be accessed. This sort of disruption is particularly detrimental for those who don't have backups of their crucial data.
Once a system is breached by malware, an extortion file _readme.txt will be delivered, which demands payment in the form of cryptocurrency – typically $480/$980 worth of Bitcoin. Hackers may also offer victims a chance to proceed with test decryption as proof that their files can actually be recovered; corresponding emails for this purpose are support@freshmail.top and datarestorehelp@airmail.cc, although cybersecurity experts recommend avoiding any contact with them.
| Name | Mztu virus |
|---|---|
| Type | Ransomware, file-locking malware |
| File extension | .mztu extension affixed to all personal files, rendering them useless |
| Family | Djvu |
| Ransom note | _readme.txt dropped at every location where encrypted files are located |
| Contact | support@freshmail.top and datarestorehelp@airmail.cc |
| File Recovery | There is no guaranteed way to recover locked files without backups. Other options include paying cybercriminals (not recommended, might also lose the paid money), using Emisoft's decryptor (works for a limited number of victims), or using third-party recovery software |
| Malware removal | After disconnecting the computer from the network and the internet, do a complete system scan using the SpyHunterCombo Cleaner security program |
| System fix | As soon as it is installed, malware has the potential to severely harm some system files, causing instability problems, including crashes and errors. Any such damage can be automatically repaired by using FortectIntego PC repair |
The ransom note
After successfully infiltrating a system and encrypting the victim's files, the Mztu virus opens _readme.txt ransom note informing users of their encrypted documents and demanding payment in exchange for the decryption key. The message usually consists of instructions on how to make the payment as well as an incentive – victims can pay quickly to reduce the amount asked for ransom. It is simply another trick to make people pay more often than not. The note says:
ATTENTION!
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:
https://we.tl/t-cud8EGMtyB
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:
support@freshmail.topReserve e-mail address to contact us:
datarestorehelp@airmail.ccYour personal ID:

What is Mztu virus, and where does it comes from?
First discovered in 2017, Djvu, which Mztu originates from, is one of the largest ransomware families out there – it has more than 600 variants released to date, including Mzop, Poqw, Bozq, and many others. Most of the time, malware creators spread these versions via pirated program installers or software cracks, so it is vital to stay away from those as much as possible in order to avoid any serious infections such as ransomware.
In order to maximize the efficiency of these viruses, they encrypt a variety of file formats, including JPG, DOC, XLSX, and more. However, it specifically avoids harming system files such as executables so that your device is still operational; their primary motive isn't necessarily to compromise your computer's operating system, but sometimes damage can arise from this infection.
When it comes to data recovery, some people might opt to pay the decryption fee, which we highly discourage doing, as there is never a guarantee that cybercriminals would deliver the provided key or even that it would work in case they do. As a result, you risk wasting your money along with your files. Instead, please check out our instructions below that could help you with alternative possible file restoration methods.
How to avoid being infected with ransomware or other dangerous threats
As a home user, there are several steps you can take to avoid getting infected with ransomware. One of the most important is to keep your computer and all of its software up to date. This means making sure that your operating system, web browser, and any other programs you use are running the latest versions, as these updates often include security patches that can protect you from known vulnerabilities.
Another important step is to be cautious when opening emails and attachments, especially from unknown senders. Many types of ransomware are spread through phishing emails that try to trick you into clicking on a malicious link or attachment. It is also important to be careful when visiting websites, as some sites may be designed to download malware automatically onto your computer. Additionally, using reputable and up-to-date antivirus software can also provide an extra layer of protection.
Malware removal from the system
Before attempting to restore the encrypted data, it is vital to remove the Mztu virus from your computer. To prevent any further harm and increase the chances of data recovery, it is critical to adhere to these steps in their specific order. The initial step should focus on the complete removal of ransomware from your system.
If your computer has been infected with malware, the first step to protect it and other devices on your network are to unplug it from any internet connection. Malware can communicate back to a remote Command & Control server through internet connections, so severing this link will put an end to any malicious activity.
Once your system is no longer connected to a network or the internet, you can scan it with SpyHunterCombo Cleaner or MalwarebytesMalwarebytes security software, although make sure it is up to date first. In case malware is interfering with this process, you can always perform in a special computer mode known as Safe Mode, which would temporarily render the virus inactive.
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing the F8 button (if that does not work, try F2, F12, Del, etc. – it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.

Windows 10 / Windows 8
- Right-click on the Start button and select Settings.
- Scroll down to pick Update & Security.
- On the left side of the window, pick Recovery.
- Now scroll down to find the Advanced Startup section.
- Click Restart now.

- Select Troubleshoot.

- Go to Advanced options.

- Select Startup Settings.

- Click Restart.
- Press 5 or click 5) Enable Safe Mode with Networking.
Once you get rid of the virus, you should then scan your device with a powerful PC repair tool such as FortectIntego, which can remove any system damage that could have occurred during the infection.
How to restore data without paying cybercriminals
Knowing the limitations of security software is essential in order to defend against ransomware infections and have a strategy prepared for recovery. Many people assume that this type of program can restore files affected by ransomware, yet unfortunately, it merely eliminates malicious files – not returning data to its original state.
While it is true that anti-malware can help you keep ransomware at bay, if your system has already been taken over by malicious software, you may be at a loss without backups. Don't fear – there might still be ways to reclaim your files without spending hundreds of dollars and supporting cybercriminals.
That being said, it is vital that you prepare copies of encrypted files before you attempt to alter them in any way, as the data may be permanently corrupted during this time. We recommend starting with a specialized decryption tool from Emsisoft designed specifically for Djvu ransomware victims.
Then, you can attempt to restore data using specialized recovery software, as explained below. Finally, don't forget to delete the “hosts” file on your system to recover access to any malware-restricted websites. You will find all the details below.
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