Uajs Virus Ransomware (.uajs File) Removal

Uajs Virus is 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 $499 to $999 in Bitcoins for the decryption key.

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About Uajs Ransomware:


NameUajs Virus
Version0859
File Extension.uajs
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Note_readme.txt
Offline IDJx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
Last seenApril 10, 2024
AlgorithmSalsa20 encryption. If Uajs 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 .uajs files in the future.
RansomFrom $499 to $999 (in Bitcoins)
Damage
  1. ⮞ Can delete Volume Shadow copies to make victim’s attempts to restore data impossible;
  2. ⮞ Adds a list of domains to HOSTS file to block access to certain security-related sites;
  3. ⮞ 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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw3cFECa7s7mFEyVOGZqu MRJuRpDI2E3tQgg2YPK/Mf2S8v2ymMAT42I5brWjeBojDbtQaz0JqzCOHWnOZ5/L qZizpeyGYki4Q6yORuW/liWFgC92YGVTYAS8PibPwBHUrbH88LbJCK3GVqwpfPih 7jx4Ly9QyDO8pfZOjM5s+kffqlkq+yfLY+amAu0x2AisNAlgtO4Wge3w9NH4xiF8 XPsrqqnLhMKo9PMrN+TDuZqrJGbb7WCEFFt3rkrBRVZVZGxPc0yfja1Fx2NEYXoZ fevYakqwPST63ndNugXO6wddQDQHQTEo0zDdvSmXLhZ+ECBoiMkcL8Z3rAdo1/BO rwIDAQAB -----END PUBLIC KEY-----
Other variants
  • Looy Ransomware (.looy encrypted files)
  • Vook Ransomware (.vook encrypted files)
  • Kool Ransomware (.kool encrypted files)
  • Uajs Virus (.uajs File): How Does Ransomware Works & What To Do?

    What is Uajs ransomware?

    Uajs ransomware dispels the myth that viruses only come from explicitly dubious activities. It stealthily infiltrates your system, encrypts your files, and demands a ransom for their return, all while rendering your security tools useless.

    The encryption employed by this malware is notably robust, further compounded by the fact that the necessary decryption key is stored on a remote server controlled by the fraudsters. The usual ransom demand hovers around $1000, and while alternative decryption methods exist, their success rates are dishearteningly low according to statistics.

    In addition to encrypting files, Uajs ransomware inflicts damage on other system components. Although not catastrophic, these modifications significantly hinder computer usability, from blocking access to certain websites to obstructing the installation of antivirus software and potentially damaging network functionalities within various applications. Promptly reversing these changes is crucial.

    The spread of Uajs ransomware typically occurs through third-party sites offering paid software for free. Such platforms also host an array of hacking tools, like cheat engines and keygens, which are manipulated to alter software behavior. For hackers, embedding malware into these programs is a simple task, given their comprehensive access to the software’s executable code. The insertion of the virus becomes a matter of financial incentive.

    Encryption process

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

    .UAJS 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 Uajs 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:

    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.
    Do not ask assistants from youtube and recovery data sites for help in recovering your data.
    They can use your free decryption quota and scam you.
    Our contact is emails in this text document only.
    You can get and look video overview decrypt tool:
    https://wetransfer.com/downloads/df01994dd8d37c2c33469922f8e7155a20240402134014/fd95b0
    Price of private key and decrypt software is $999.
    Discount 50% available if you contact us first 72 hours, that's price for you is $499.
    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]

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    🔗 HowToFix.Guide: How To Decrypt .uajs Files?

    Indicators of Compromise(IOC)

    File NameMD5File Size
    📜 SAMPLE.EXE3c957e6d08dab67ea7401102d7cae49f736768
    📜 SAMPLE.EXEd40bded9feb3bb9f8e86e4f5278e6743736768
    📜 SAMPLE.EXE2c5d1db545700c74bb9eee8d95b7d7d9735744
    📜 SAMPLE.EXE4493cb2250a03e978ccd0e8818d92418736256
    📜 SAMPLE.EXE94a5393608ffd9ba04de5eb4ef9ced66776192
    📜 SAMPLE.EXEfc25688ec762633940e143cd15732146736256
    📜 SAMPLE.EXE0d01ddb43e2fde53371e24221082df58737792
    📜 SAMPLE.EXE6315d047f3065e537d763f9599914543736256
    📜 SAMPLE.EXE79b50ee54735b136dcddeb2cc905ecc1805376
    📜 SAMPLE.EXE385f51e2f29bab1d2dc12bf0edbe69e1807424