Crynox (.crynox) Ransomware Virus

What is Crynox Ransomware?

Crynox ransomware is a malicious software variant designed to encrypt user files and extort victims for money. This threat appends the “.crynox” extension to affected files, rendering them inaccessible. Upon encryption, Crynox displays a ransom note titled “read_it.txt” and changes the desktop wallpaper, further intimidating victims to pay a ransom in Bitcoin to restore their data.

Crynox is based on the Chaos ransomware family, which employs RSA and AES encryption methods to ensure file decryption is practically impossible without the private key held by the attackers. Victims are urged to contact the perpetrators through email (crynoxWARE@proton.me) or a designated website for payment instructions.

How Crynox Operates

File Encryption and Renaming

Crynox encrypts files and appends the ".crynox" extension. For instance, "1.jpg" becomes "1.jpg.crynox," and "2.png" changes to "2.png.crynox." This process renders files unusable without the decryption key.

Ransom Note Details

The ransom note claims:

• Files have been encrypted using RSA and AES encryption.
• Decryption is only possible with a private key stored on the attackers' server.
• Victims must pay a ransom in Bitcoin to retrieve their files.

The attackers provide contact information, including an email address (crynoxWARE@proton.me) and a website link for further instructions.

Additional Variants

Some Crynox variants display different desktop wallpapers or slightly altered ransom notes, but the core operation remains the same.

The Threat of Ransomware

Ransomware, including Crynox, poses significant risks:

• Data Loss: Files become inaccessible unless decrypted.
• Financial Loss: Victims may pay ransoms without any guarantee of file recovery.
• Further Infections: Ransomware often spreads across networks and may install additional malware, such as password stealers or trojans.

Prominent ransomware examples include Black (Prince), X101, and Starcat.

How Crynox Infects Computers

Common Distribution Methods

• Phishing Emails: Malicious attachments or links trick users into downloading ransomware.
• Pirated Software: Cracking tools and key generators often come bundled with ransomware.
• Malicious Ads: Clickbait ads redirect users to compromised websites.
• Infected USB Drives: External drives with preloaded malware.
• Exploited Vulnerabilities: Outdated operating systems and software provide entry points.
• Torrent Websites: Peer-to-peer networks often harbor ransomware-laden files.

Symptoms of a Crynox Infection

Victims of Crynox ransomware may notice:

• Files encrypted with the ".crynox" extension.
• A ransom note (“read_it.txt”) on the desktop.
• Altered desktop wallpaper displaying ransom information.
• Inability to open previously accessible files.
• Demands for Bitcoin payments to restore files.

Removing Crynox Ransomware

Step 1: Isolate the Infected Device

Disconnect the infected computer from the internet and any network connections to prevent further spread of the ransomware.

Step 2: Boot into Safe Mode

1. Restart your computer.
2. Press the appropriate key (e.g., F8, F12) during startup to access Advanced Boot Options.
3. Select Safe Mode with Networking.

Step 3: Use Anti-Malware Software

• Install a reputable anti-malware tool, such as SpyHunter.
• Run a full system scan to detect and remove Crynox and other malware components.

Step 4: Delete Suspicious Files

Manually check for and remove any suspicious files or programs:

1. Press Win + R and type appwiz.cpl to open Programs and Features.
2. Uninstall recently installed unknown programs.
3. Navigate to C:\Users\[Your Username]\AppData and delete suspicious folders/files.

Step 5: Restore System

If you have backups:

1. Restore encrypted files from an external or cloud backup.
2. Ensure the device is malware-free before restoration.

Step 6: Professional Decryption Assistance

Currently, there is no free decryption tool available for Crynox ransomware. Victims may:

• Monitor trusted cybersecurity websites for updates.
• Avoid paying the ransom, as attackers may not deliver the decryption key.

Preventing Future Infections

Regular Backups

• Maintain backups on remote servers or offline devices.
• Use automated backup tools to simplify the process.

Stay Updated

• Regularly update your operating system and software to patch vulnerabilities.
• Enable automatic updates for essential programs.

Use Robust Security Software

• Install reputable anti-virus and anti-malware tools.
• Enable real-time protection and conduct regular scans.

Practice Email Caution

• Avoid opening emails from unknown senders.
• Do not download attachments or click on links from suspicious sources.

Avoid Pirated Content

• Download software only from official or verified sources.
• Avoid using cracking tools and key generators.

Network Security

• Use a strong, unique password for your Wi-Fi network.
• Enable a firewall to block unauthorized access.

Educate Yourself

• Stay informed about the latest cybersecurity threats.
• Teach employees or family members about safe online practices.

Conclusion

Crynox ransomware is a formidable threat that encrypts files and demands payment for their restoration. While paying the ransom is discouraged, users can protect themselves by practicing robust cybersecurity measures, maintaining regular backups, and using reliable anti-malware software. Victims should act swiftly to remove the malware and prevent further damage.

Text Presented on Crynox's website (and the "read_it.txt" File)

CRYNOX Ransomware
=======================================
Oh No! Your files has been encrypted.

What happened to my files ?

All of your files were protected by a strong encryption with RSA & AES 
More information about the encryption keys using RSA4096 can be found here:

RSA : hxxp://en.wikipedia.org/wiki/RSA_(cryptosystem)
AES : hxxps://en.wikipedia.org/wiki/Advanced_Encryption_Standard

How did this happen ?

Specially for your PC was generated personal RSA & AES, both public and private.
ALL YOUR FILES were encrypted with High grade cryption.
Decrypting of your files is only possible with the help of the key and decryptor, which is on our Secret Server

What should I do ?

So, there are two ways you can choose: leave your data encrypted, or start obtaining BITCOIN NOW! , and restore your data easy way.
If You have really valuable data, you better not waste your time, because there is no other way to get your files, except make a payment.
For more specific instructions, please visit your personal home page, there are a few different addresses pointing to your page below:

1. -

If for some reasons the addresses are not available, follow these steps:
1. Open your email application. After opening the email application :
2. Contact me at : crynoxWARE@proton.me
3. Write an email about the ransomware and send it to us.
4. Wait until we replied to you about the decryptor application.

---------------- IMPORTANT INFORMATION------------------------
Support Email : crynoxWARE@proton.me

Crynox's Desktop Wallpaper

Your Device has been encrypted
Your files, photo, videos, document, music etc.
Has been encrypted with AES 256 & RSA encryption

There should be an HTML file to open automaticly. If not visit this link:
-
-

DO NOT CHANGE FILE EXTENSION / USE 3rd PARTY APPS! DATA LOSS GUARANTEE!
DON'T DO ANYTHING STUPID! FOLLOW THE RANSOM NOTE IF YOU WANT YOUR FILES BACK!

Crynox. Cry More