"Ransomware attacks like WannaCry highlight the critical need for robust cybersecurity measures and regular data backups. They serve as a stark reminder of the vulnerabilities in our interconnected digital world."

Stockholm is a Python-based ransomware simulation tool designed for educational and cybersecurity training purposes. It encrypts files within a specified directory and provides functionality to decrypt them using a generated or provided key. The tool includes options for silent operation, version display, and help documentation.

• File Encryption: Encrypts all files in the specified directory using the cryptography library.
• File Decryption: Decrypts files using a provided decryption key.
• Silent Mode: Suppresses output to the terminal for a quieter operation.
• Help Menu: Displays usage instructions and available options.
• Version Information: Displays the current version of the tool and system information.

Run the script with the following options:

• --help or --h: Display the help menu with usage instructions.
• --version or --v: Show the current version of the tool and system information.
• --r <key>: Reverse the encryption process using the provided decryption key.
• --silent or --s: Suppress output to the terminal.

Tip: You can modify the target folder for encryption or decryption by changing the directory path in the script. In a real-world scenario, ransomware typically targets sensitive data or the user's home directory.

1. Encrypt Files:

   python3 stockholm.py

2. Decrypt Files:

   python3 stockholm.py --reverse <decryption_key>

Note: The make reverse option is included for educational and security training purposes. It uses the filekey.key generated and stored during encryption. In a real ransomware attack, the decryption key would typically be deleted or withheld, making recovery without the key impossible.

3. Display Help:

   python3 stockholm.py --help

4. Show Version:

   python3 stockholm.py --version

5. Silent Mode:

   python3 stockholm.py --silent

1. Encryption:

   • The tool generates a unique encryption key using the cryptography library.
   • All files in the specified directory (Folders_to_encrypt) are encrypted.
   • The encryption key is saved to a file named filekey.key.

2. Decryption:

   • The tool uses the provided decryption key to decrypt the files.
   • If the key is invalid, an error is raised.

3. File Crawling:

   • The tool recursively scans the specified directory to identify all files for encryption or decryption.

4. Output:

   • The tool displays the progress of encryption or decryption unless silent mode is enabled.

• Python 3.x
• Required Python libraries:
  • cryptography
  • art
  • scanf

Install the required libraries using pip: