Xaro Virus Ransomware (.xaro File)

Xaro 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 $490 to $980 in Bitcoins for the decryption key.

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About Xaro Ransomware:


NameXaro Virus
Version0709
File Extension.xaro
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Note_readme.txt
Offline IDuK3VnHYy6oibGbO8t2PDOMcT40gQoh5oUUCe2Lt1
Last seenNovember 29, 2023
AlgorithmSalsa20 encryption. If Xaro 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 .xaro files in the future.
RansomFrom $490 to $980 (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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1A3JriDO7u1CLkwKeW2f xNsg1do1GzyuiF/NFBKvIJDFUj8EIurRbvMwBCavTVSLZGCsNKOrVG4w+c+5jqVo 0WCwPTf8YoQYZGWLH5wJGPeoQnQyXlK2hAPX8Z9G4xq8qPGbJnHWURuib9bLOf4j 7kr7TDJNcK6ZXOCX7L1FOgOQLtqRyRxC1tucQ1+SPftPimU8JQgtNp4czak+KQ84 nmHvwAdHA23pyzPlCOD529K8PKiFOYRGRaLY1iy+syBP09UT/cBK89zJQz34A9zy 6NoTkLOlOAxQCfiriS1UbIz1I/AUMIQOHvxWPVnZNOC450EDHzFOze8Ll5O2YvTn BwIDAQAB -----END PUBLIC KEY-----
Other variants
  • Xatz Ransomware (.xatz encrypted files)
  • Xash Ransomware (.xash encrypted files)
  • Gatz Ransomware (.gatz encrypted files)
  • Xaro Virus Ransomware (.xaro) File - How does it work?

    What is Xaro ransomware?

    Xaro ransomware belongs to the STOP/Djvu ransomware family. This malware family is usually targeted at individuals. Besides the statistics, this targeting can also be figured out through the specific distribution methods and actions this malware does after the injection. It encrypts the files with a robust cipher - Salsa20, which is impossible to “hack”. All decryption keys are kept on the remote server, controlled by cybercriminals.

    This malware makes some changes to your system configuration. One of the most significant is stopping Microsoft Defender and preventing the anti-malware software installation files from launching. These changes are done through the Group Policies - a particular interface in Windows for interaction with deep system settings.

    Xaro ransomware is usually spread through the dubious sites that offer the programs for free. Usually, you need to buy these programs, but these web pages offer a very tempting offer - get it without any payment. They make the programs usable without any licensing by hacking their source code. These crooks can easily add any virus at the moment of source code editing. Which one? Depending on how much they paid for the certain malware.

    Other sources of Xaro ransomware are so-called hack tools. Apps like keygens, Windows activation tools, cheat engines, and so on are perfect carriers for any malware. Using them, you are risking not only getting infected with the Xaro virus but also being fined for unlicensed software usage by local authorities.

    Encryption process

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

    .XARO 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 Xaro 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.
    You can get and look video overview decrypt tool:
    https://we.tl/t-otP8Wlz4eh
    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.


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

    Indicators of Compromise(IOC)

    File NameMD5File Size
    📜 SAMPLE.EXE5d75316d7e1bd2022aa89a3051bd59c3786944
    📜 SAMPLE.EXE53101a13a7f8f817e1a7671cdf9b0b09786432
    📜 SAMPLE.EXEdc8396334e68e4ad4a8de1ae8dd3fbe8786432
    📜 SAMPLE.EXEd1e8a193b7e485205611b4496ac0269c273408
    📜 SAMPLE.EXE596fe9d724dd1a4b95d3bf5f61baf2f2786432
    📜 SAMPLE.EXE38cfba671f5995985ac13de046a9d6aa786432
    📜 SAMPLE.EXEba285fbc050e319860e70bc07dd50c3c274432
    📜 SAMPLE.EXE1c67e1b83665ef85b38e751c7238803f145349
    📜 SAMPLE.EXEdf32f71d07c4e12ff7d99243237fe266274944
    📜 SAMPLE.EXEb8dc3028562df4c7d77306ab31778bd6786432