Cdqw Virus Ransomware (.cdqw File) Removal

Cdqw 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 $999 to $1999 in Bitcoins for the decryption key.

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About Cdqw Ransomware:

NameCdqw Virus
File Extension.cdqw
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Offline IDmMsRxMUuXypapZbGOAfxD9pczHmW8zVRP7Pgjwt1
Last seenMay 03, 2024
AlgorithmSalsa20 encryption. If Cdqw 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 .cdqw files in the future.
RansomFrom $999 to $1999 (in Bitcoins)
  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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnyUOiB2xE7x0hu/sWjMd sFuLWuCJ5W6ojiVZfPkO3WsiKQE44ncZ7vAvQJa0bzVOF1YKNM9ycEaFo3i1IYPt xz/jq68R20b+hkZtNTv54hcU7/Ez+0pdyzteV5Zhg7wXU130hV2tpLc73CPJWPbH 1Cb/TPj2BV1MyBjdQNygBMKZXr5AiecEZscmy3tPXp6G+PWkUj06eqE1m7OGGguB 99Z7DX1/1zY5jmMj5lpDmJWwWf7WaMni1yYPeNWGd67CNvvOmb+YjuTg4HXMAgQ2 WnCip4mCf70IqmZ2U/J0OUQFuCkNaQb0Q0aLFcT4bMDszWR/xOhuh2YWJQ0LO+gm JQIDAQAB -----END PUBLIC KEY-----
Other variants
  • Lomx Ransomware (.lomx encrypted files)
  • Loqw Ransomware (.loqw encrypted files)
  • Ljaz Ransomware (.ljaz encrypted files)
  • Cdqw Virus (.cdqw File): How Does Ransomware Works & What To Do?

    What is Cdqw ransomware?

    Cdqw ransomware is something you'll want to avoid at all costs. Its impact extends beyond just encrypting your files—it also hits your wallet hard and compromises your computer's configurations, weakening your system's defenses. Therefore, it's much wiser to prevent its intrusion than to mitigate the aftermath of its activities.

    The majority of Cdqw virus infections stem from the use of "free" software. These applications are meant to be bought, but hackers bypass the license verification, allowing them to be used without payment. In the process of tampering with license checks, it's all too easy for hackers to implant malware into the program's code. The specific malware introduced is often a factor of the hacker's compensation, with Cdqw ransomware being a prime example of such malicious software.

    The Salsa20 encryption algorithm is what this virus uses to lock your files. While not the most formidable encryption available, its effectiveness is significantly enhanced due to the decryption key being held on a remote server controlled by the ransomware operators. Accessing the essential decryption key without submitting to the ransom demands is practically impossible. Attempts at brute force decryption are futile, given the overwhelming number of potential keys. While file decryption tools might offer a glimmer of hope, the likelihood of successfully recovering your files remains slim.

    Encryption process

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

    .CDQW 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 Cdqw 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:


    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:
    Price of private key and decrypt software is $1999.
    Discount 50% available if you contact us first 72 hours, that's price for you is $999.
    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:
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    🔗 HowToFix.Guide: How To Decrypt .cdqw Files?

    Indicators of Compromise(IOC)

    File NameMD5File Size
    📜 SAMPLE.EXEef7fb8e5c9ad45e5a5fbc088f2d0b35d1273856
    📜 SAMPLE.EXE538b71221fc868d804dad1b3019cf73e215552
    📜 SAMPLE.EXE9f24dec06808e344b432c6e1259861b1167235
    📜 SAMPLE.EXEe87e14f0aae4561103119011a7f51b47171126
    📜 SAMPLE.EXEc9f5854233e795864b3b14f3af52a49d28312
    📜 SAMPLE.EXE7dea7c9580f62aaf5acfccbd468d8489171669
    📜 SAMPLE.EXE9e5e6ddfa9c14e7475fbf463ca0ceea6290816
    📜 SAMPLE.EXEfa478caf9b478e980f2569a77bd97b4e289792
    📜 SAMPLE.EXE2a8259cd3bc0019553716550f01132286920549
    📜 SAMPLE.EXE9a879d8f2f853ba485e211b4927d07df39066