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OPQZ Ransomware (.opqz File Extension)

OPQZ 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 Opqz:


NameOpqz Virus
Version0216
File Extension.opqz
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Note_readme.txt
Offline IDzmgd82h65FItjbl56ff6P5GS3sZpZ1qEEGUOW6t1
Last seenJune 25, 2022
AlgorithmSalsa20 encryption. If Opqz 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 .opqz 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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6mc4av0qBgVc00vu120E 6TPCO04Qbf79EbDUdCP3FO5jFuLLmOa15oplHveKsXedyzhurGAunV6wJhjWxGxK D43w210FT8uH/zZPqDvnatctgugSZHxRLMhBldi6JMz6hrYVyRDXL1y7juR9ml9w cxcTDUr19L32HLpsSzLXqIa/Fg9MuNtfWnGvWtOs19w5Oo5fjuT/PVhSZ5k65F6X 579S3wEiV3YoC3Pesk2JEHLH60LEOPqlWaHbvlDGODi3U2hDIYNENZFSFyS5dqaX FEFdOpEqya8Nh77OEIK91fCWYXmK7I2UmZwPOtLihST4iweNNMRmaw8p7blgLHbJ 5QIDAQAB -----END PUBLIC KEY-----
Other variants
  • Npsk Ransomware (.npsk encrypted files)
  • Lokd Ransomware (.lokd encrypted files)
  • Rezm Ransomware (.rezm encrypted files)
  • OPQZ Virus Removal Tool

    What is Opqz?

    Discovering files with the .opqz extension on your computer is a clear indicator that you've been targeted by the Opqz ransomware. This malware aims directly at your finances—it encrypts your files and demands a ransom for their decryption. Before encrypting your files, it performs various modifications to your system settings to deactivate security defenses and block the execution of antivirus programs.

    The Opqz ransomware utilizes the Salsa20 encryption algorithm. Although this cipher is not the most robust form of encryption, decrypting it through conventional means remains impractical.

    The security modifications made by the Opqz virus are extensive. It deactivates Microsoft Defender and tweaks system configurations to prevent the installation of most antivirus software. Furthermore, it modifies the HOSTS file, obstructing access to websites that offer ransomware removal and file decryption advice.

    Opqz Encryption process

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

    .OPQZ 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 Opqz 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.

    Opqz 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 photos, 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-sBwlEg46JX
    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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    Indicators of Compromise(IOC)

    File NameMD5File Size
    📜 SAMPLE.EXEe93a3705fdd01cf942e4830e148f0b66726016