Gridinsoft Logo

TUID Ransomware

TUID a strain within the STOP/Djvu Ransomware family, employing the Salsa20 encryption algorithm to encrypt files on compromised systems. Victims are coerced into paying a ransom ranging from $490 to $980 in Bitcoins for the decryption key.

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

About Tuid Ransomware:


NameTuid Virus
Version0440
File Extension.tuid
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Note_readme.txt
Offline IDLgcOIftV0dQfFBQStVNfb8BhHy8tHRPvXwSiFwt1
Last seenDecember 25, 2024
AlgorithmSalsa20 encryption. If Tuid 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 .tuid files in the future.
RansomFrom $490 to $980 (in Bitcoins)
Damage
  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 virus, 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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw6gz/ffsTkk5ewfNdjiC /ME2NBfyFrkNQo/H/kZAAyyO60uLVR+uosXsXShe0kEMIfXW9JN0p0Rnsj8Efe7O 30UAcrUUZWTIYO19kpfgrPvFbBAz9+FUGWprL05OzPGJS3u/74QoQwSJOZy3yNs1 /gYpCTbjHuA3PJ6oaGbaKjr0/4CwIdAejSE06g/Rls5CADnkuJfidvUXmdSfWyop vE8ZCPZFO4pVSSk/g9FjACJrgjY7TbnZTONvHok4mLg4o5TiQupMWD+PljW9m4da kxmaxi2GLkJAqUYTVxfWI5VaWdXQmKg5tjOvJHRR1N33xvAQa5j5WPNxoVLODOXj owIDAQAB -----END PUBLIC KEY-----
Other variants
  • Gtys Ransomware (.gtys encrypted files)
  • Udla Ransomware (.udla encrypted files)
  • Wdlo Ransomware (.wdlo encrypted files)
  • TUID Virus Removal Tool

    What is Tuid Files?

    The Tuid virus can accurately be categorized as ransomware. It encrypts your files and then demands a ransom for their release. Tuid is part of the STOP/Djvu ransomware family, currently among the most prolific. This group predominantly preys on individuals downloading software from third-party websites.

    During an attack by the Tuid malware, your files are encrypted using the Salsa20 algorithm. This encryption technique implies approximately 2^256 possible decryption keys, equating to a 78-digit number. Regrettably, obtaining the key through brute force or other common hacking methods is practically unfeasible.

    The distribution method of the Tuid malware is critical to understand. It's established that dubious websites offering "cracked" software and unreliable tools are the main distribution channels for the entire STOP/Djvu family, and Tuid is no exception. This ransomware is typically embedded in software presented as "free", despite being paid products on official sites. Users who bypass license verification in these programs inadvertently incorporate malware into the "final product", as virus developers compensate them for this. Similarly, questionable tools like cheat engines, Windows activators, or keygens often require disabling your antivirus software, leaving you vulnerable and likely unaware of the infection until it's too late.

    Tuid Encryption process

    The Tuid 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 - ".tuid". Then, ransomware creates a _readme.txt file in the folder where the encrypted file is located, and goes to the next folder.

    .TUID 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 Tuid 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.

    Tuid Ransom Note:

    Ransom note is the same for the whole STOP/DJVU 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:

    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-FglTTmgzZT
    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]

    Reserve e-mail address to contact us:
    [email protected]

    Your personal ID:
    ****************

    Indicators of Compromise(IOC)

    File NameMD5File Size
    ๐Ÿ“œ SAMPLE.EXE1f2621ad5f259c41db07928b3d0d44bf857600
    ๐Ÿ“œ SAMPLE.EXEecbe71acc090c1bb8e77118f01f6c2b9775168
    ๐Ÿ“œ SAMPLE.EXEea51722ae600257b8feba5c3a6473a6b679464
    ๐Ÿ“œ SAMPLE.EXE65ac13d692318302e314eb2ed5627476803840
    ๐Ÿ“œ SAMPLE.EXE69ded3d0a8001495bf29a27505929d96777728
    ๐Ÿ“œ SAMPLE.EXEd834245925248f4b8f04e15ddba11730778240
    ๐Ÿ“œ SAMPLE.EXE056d464d213ff65349e6206c800434b2787456
    ๐Ÿ“œ SAMPLE.EXEb68c88878f6b9bdd0df07df4dd78a5c2777728
    ๐Ÿ“œ SAMPLE.EXE361d9b1bee71debf8d966051c0369a9a858112