Mbtf Ransomware (.mbtf Files)

Mbtf Ransomware uses the Salsa20 encryption algorithm. This STOP/Djvu family is one of the most popular infection!

You may be interested in taking a look at our other antivirus tools:
Trojan Killer, Trojan Scanner.

About Mbtf Ransomware:

NameMbtf Virus
File Extenstion.mbtf
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Offline IDd1BN9KEra4Hetg5GUH0nQZqy14sntD2NbihzGQt1
Last seenDecember 11, 2022
AlgorithmSalsa20 encryption. If Mbtf cannot establish a connection to crooks server before starting the encryption process, it uses the offline key. This key is the same for all victims(!), making it possible to decrypt .mbtf files in the future.
RansomFrom $490 to $980 (in Bitcoins)
  1. โฎž Can delete Volume Shadow copies to make victimโ€™s attempts to restore data impossible;
  2. โฎž Adds a list of domains to HOSTS file to block access to certain security-related sites;
  3. โฎž Installs password-stealing Trojan, like Redline Stealer, Vidar Stealer, Smokeloader, Azorult and others;
DistributionThird-party downloaders, installers, peer-to-peer networks, RDP exploits, etc.,
RSA Public Key-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsSi5QgH3Ks1SOULF2JVX 5RVGNjLSISW/Mc9ITRhBgYQlOLUfH8fHMEgMFGVWOkB/fu8nJPTMvaPaQejRY79H MettKbmuzPhIfxP4d2b3+eEBGbRpkIgb8jW7VQ3wpiQMCsxu3VqNqwZ/tbqSGHzH SB72/wLaPWRhhUI60FLqJcyGeBeK9aOOY04j6zxWRmpgSRpV4UM0fz0OETRUBGO6 Ism7GsPFFzJH5Era5sE52Qz0v7symdeuFY56BvSjonLRJUT3/gbclu1WfDukDD+G tZ7dztFVKJLLp7q1CRLuBwc8wErvjO7YJ1mpZHw9WjufX3LudCgAccZyljnPAp16 VQIDAQAB -----END PUBLIC KEY-----
Other variants
  • Mppn Ransomware (.mppn encrypted files)
  • Uyit Ransomware (.uyit encrypted files)
  • Uyro Ransomware (.uyro encrypted files)
  • Mbtf Ransomware (.mbtf Files) - What is it? Keep Your Privacy Well

    Spectating that your files have a strange .mbtf extension means that you are infected with Mbtf ransomware. This dangerous virus extorts your money, previously encrypting the files you have on your computer. Crooks, who manage the spreading of this malware, ask for almost $1000 for file decryption. Fortunately, there are several other ways to solve the problem.

    The decryption process after the Mbtf virus attack must be conducted with special software. Manual attempts (with brute force, for example) will take too much time - 2^256 keys exist for the cipher that Mbtf malware uses. You will spend more time than our planet existed and will approximately exist. Meanwhile, tools that are designed specially to decrypt the files after the ransomware attack can do it just in an hour.

    System repairing must be conducted with other applications. Ransomware makes different changes in your Windows settings, which are all targeted at weakening your system. Reverting these changes is vital because otherwise, you will struggle to install the programs or connect to various websites. GridinSoft Anti-Malware performs the system recovery during the ransomware removal process.

    It is also important to mention how you get a virus. Almost all STOP/Djvu families (and Mbtf ransomware is its member) use the programs from untrustworthy sites as the main distribution way. People often use such sources as eMule, or ThePirateBay, to get a certain application for free. However, while making the programs usable without purchasing, hackers can freely add any malware. Exactly, Mbtf ransomware is just a case.

    Encryption process

    The Mbtf ransomware uses the Salsa20 encryption algorithm. That is not the strongest method, but it still provides an overwhelming amount of possible decryption keys. To brute force the 78-digit number of keys, you need 3.5 unvigintillion years (1*10^65), even if you use the most powerful regular PC. Quantum computers can show a bit better results, but it is still too slow to get your files back while you are alive.

    The exact algorithm of encryption is next: malware scans each folder for the files it is able to encrypt. Then, when it finds the target, it makes a copy of your file, removes the original one, encrypts the copy and leaves it instead of the removed original. Such a procedure is done to prevent the situation when you have already opened the file, so ransomware is not able to read it because of the Windows restrictions. To each encrypted copy, the virus adds the specific extension - ".mbtf". Then, ransomware creates a _readme.txt file in the folder where the encrypted file is located, and goes to the next folder.

    .MBTF Files

    Such an encryption method can be exploited for file recovery. Since the original file is deleted, you may try to recover it using the file recovery tools. The less time is passed - the bigger the chance to get your files back, so hurry up!

    Another specific moment that can help you to use the files even after the encryption is the fact that Mbtf ransomware encrypts only the first 150KB of each file. Hence, you can try to run a big file, such as video or music, without the encryption. Similar feature also works with other ransomware families - Dharma, Conti and Makop encrypt the same 150KB.

    Ransom note: _readme.txt

    Ransom note is the same for the whole ransomware family. In fact, it is one of the main signs of to which family the certain ransomware belongs. Here is the typical note for STOP/Djvu family:


    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:
    [email protected]

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    ๐Ÿ”— Remove Sapp Virus Ransomware (+File Recovery)
    ๐Ÿ”— Remove Erop Virus Ransomware (+File Recovery)
    ๐Ÿ”— Remove Erqw Virus Ransomware (+File Recovery)

    Indicators of Compromise(IOC)

    File NameMD5File Size
    ๐Ÿ“œ SAMPLE.EXE8a7466a21185a1e35b57bde33e7664cc258560
    ๐Ÿ“œ SAMPLE.EXE7377324271b0449fae9580b14cde0fb6206336
    ๐Ÿ“œ SAMPLE.EXEd771bde174b8cfb91fe57df2685b55d1266240
    ๐Ÿ“œ SAMPLE.EXEfb6bb76496f4fed9efe4b6a652243d4e265728
    ๐Ÿ“œ SAMPLE.EXE56211714ad6a5b7b1c0a24703d7d80fe279552
    ๐Ÿ“œ SAMPLE.EXE1a53c1e519e9723fca049867cde4c167281088
    ๐Ÿ“œ SAMPLE.EXEc65f711e4078b24330ec126081df02e7181091
    ๐Ÿ“œ SAMPLE.EXE1809fd6291d552d65517a8bba8e2be8a281088
    ๐Ÿ“œ SAMPLE.EXEd536197ddffb51b419fccacb8b3eacfd171841
    ๐Ÿ“œ SAMPLE.EXEe4f3b822266b2968c65d8ae416e104b0280576