Craa Ransomware (.craa Files)

Craa Ransomware uses the Salsa20 encryption algorithm. This STOP/Djvu family is one of the most popular infection!

You may be interested in taking a look at our other antivirus tools:
Trojan Killer, Trojan Scanner.

About Craa Ransomware:


NameCraa Virus
Version0661
File Extenstion.craa
Contact[email protected], [email protected]
FamilySTOP/Djvu Ransomware
Note_readme.txt
Offline IDfTU4hYOJ0niv7WAg9utRTzxXv2TcoEvGPJhzIot1
Last seenMarch 14, 2023
AlgorithmSalsa20 encryption. If Craa 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 .craa 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, 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----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwhbzSU/RiBxX4oxDqunU 9VhWvvVRrVdcW+jVpL4otXD4yNHqD7xJLxPsoX6AsIiIio1zjCTeSgyWyswk8ay6 HzHYbhW30qp+g6Z1mz2b2B7KSNY+JX6PNWzdCCEWO1udpQ9M9jbiOg8ws59dnT7i LTeCEWV/uDEAzsBjEwESZn3Qst2n9O3BvfCBak50wLbscyk0sTej37Tc62V8E8X7 I9XY4xDsMkg/n1rYs6E9oAfhq25y2dlAAnyGa8riBgKsUkeOH/tkKfvlT2MAd8OG gPNi8unQY1M2DjGm74SYsX+ecl2AgwPpJuWT5Sbp29PBQH1n0CyJGQ6iJCmV3PXK lQIDAQAB -----END PUBLIC KEY-----
Other variants
  • Coba Ransomware (.coba encrypted files)
  • Coaq Ransomware (.coaq encrypted files)
  • Cosw Ransomware (.cosw encrypted files)
  • Craa Ransomware (.craa Files) - What is it? Keep Your Privacy Well

    Infecting the system with Craa ransomware is a case with very dangerous consequences. This virus makes various changes in your system settings, which make your system much harder to use. Of course, besides the settings altering, the malware also encrypts your files, so you cannot open them in any way.

    The encryption algorithm used by Craa ransomware is Salsa20. It is typical for all STOP/Djvu ransomware (Craa belongs to that โ€œfamilyโ€). Decrypting tools allow you to get your files back without payment, but the things also depend on random. If your files are ciphered with the offline key - you have a big chance of getting your files back. However, the online encryption key usually means that decryption is impossible.

    The best way to deal with ransomware attacks is to prevent them. Usually, Craa ransomware is spread inside the programs you get on dubious sites. Although these apps are free, they must be purchased on the official website. Other programs are designed for some outlaw things - cheating, for example, or Windows activation. While making the program usable without any payments, hackers are free to add any malware into this program - depending on who paid the most.

    Encryption process

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

    .CRAA 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 Craa 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-hhA4nKfJBj
    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
    ๐Ÿ“œ SAMPLE.EXE71fd5b295d0807826ec39a43b26cc73f1273856
    ๐Ÿ“œ SAMPLE.EXEda75c7fe6dca73c9e3df80dacf68d82e723456
    ๐Ÿ“œ SAMPLE.EXE8e72f80f57f0a2061ed8707b4ae8bd0b723456
    ๐Ÿ“œ SAMPLE.EXE8e335bde5ed8b1c9f9f459074421901b723456
    ๐Ÿ“œ SAMPLE.EXE31cf22098f9e31343f1f4a0713e3013d722944
    ๐Ÿ“œ SAMPLE.EXE61ba3dae1a44c36309224d931ac995d1653751
    ๐Ÿ“œ SAMPLE.EXEd310a6f0d6695c5db6467b8cc7a869fd653699
    ๐Ÿ“œ SAMPLE.EXEa6446754a3635217c8c76b9bc06105bc861696