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JYPO Ransomware (.jypo File Extension)

JYPO 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 Jypo:


NameJypo Virus
Version0676
File Extension.jypo
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Note_readme.txt
Offline IDMEMHlobHgXqvmTWaMsLcwGZhDOd00bblO1yevst1
Last seenApril 26, 2023
AlgorithmSalsa20 encryption. If Jypo 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 .jypo 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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqQrj3eE3PTt4E9L/NoFp y3p9S/BDoeV0wHaleN6Waf03Fy8IodxDXHVC5HnQYk6Ryyos3W5FwlPKvHVT03e7 kxtpXZQNfqyHXli125pB6YX7YsWU99nWl2eQ88CSLfCW/joL6ZHuVfGvzkNS8Pry FQd3kJdML30uMv1zrptlLagBlPfgBaugSGQYwtcIv49FYwB/B1gT9pRxVpw6ZAS6 YA/+/5FlBUGwj+Qns0m7XPp1xN9lQ1CRgtxljxF3fD4GfgPhKgGjHtuVw6V/lWiF e+dlBsYxh/G66GW7hExD7yZDgol/6nrTDC87kS4NtrA16dY/4wJFl8rkjEKxp1Yg ZwIDAQAB -----END PUBLIC KEY-----
Other variants
  • Jywd Ransomware (.jywd encrypted files)
  • Jycx Ransomware (.jycx encrypted files)
  • Tyos Ransomware (.tyos encrypted files)
  • JYPO Virus Removal Tool

    What is Jypo?

    Ransomware manifests in numerous forms, with Jypo ransomware representing a particularly insidious variant. This virus specifically targets individual users, encrypting any accessible files on the infected device. Moreover, it incapacitates your security defenses and significantly complicates networking activities.

    Recovering the encrypted files is an arduous task. The malware employs the formidable Salsa20 encryption algorithm, rendering brute-force hacking attempts futile. Subsequently, it transfers the decryption keys to a command server under cybercriminal control. These adversaries will only relinquish the decryption key upon receiving a ransom payment or if they are apprehended by law enforcement.

    The distribution of Jypo ransomware follows conventional pathways common to many viruses. Software obtained from peer-to-peer networks (such as eMule or ThePirateBay), often touted as "free," serves as an ideal vector for ransomware dissemination. Users are likely to dismiss security warnings during download and installation, leaving them oblivious to the antivirus's incapacitation following the attack.

    Jypo Encryption process

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

    .JYPO 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 Jypo 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.

    Jypo 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-fkW8qLaCVQ
    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:
    ****************

    ๐Ÿ”— HowToFix.Guide: How To Decrypt .jypo Files?

    Indicators of Compromise(IOC)

    File NameMD5File Size
    ๐Ÿ“œ SAMPLE.EXE438c524825fa5796932fc0b3e71c5530801792
    ๐Ÿ“œ SAMPLE.EXEd5f44fb56fbe9aa34059918852502617281600
    ๐Ÿ“œ SAMPLE.EXE294f2eaa193bad38c22be347cb2edd88801280
    ๐Ÿ“œ SAMPLE.EXEa1c240e28cf9828fe5adc68119a57fa6280576
    ๐Ÿ“œ SAMPLE.EXE6b989e5933672c25ea67617267024a911273856
    ๐Ÿ“œ SAMPLE.EXE4293ec458e657eeb42ca2ec2eb09b76d281088
    ๐Ÿ“œ SAMPLE.EXE4337baca641bc801e6223757534aee9d801280
    ๐Ÿ“œ SAMPLE.EXE988f1622b98be1cec133fc839e0fc918256512
    ๐Ÿ“œ SAMPLE.EXE2288260696cf043ce22bcc826bfd2004256512
    ๐Ÿ“œ SAMPLE.EXEdf685c46122667099f011d1e0e9e8c1b266240