RFID Badge Cloning: Evolution and Modern Techniques

BLUF: RFID badge cloning has become significantly more accessible with tools like Flipper Zero, enabling security testers to bypass physical access controls through various covert methods that exploit vulnerabilities in both low and high-frequency badge systems.

Key Takeaways:

• RFID badges use either low frequency (125kHz, less secure) or high frequency (13.56MHz, more secure) protocols, both vulnerable to cloning with proper tools
• ESP RFID tool enables creation of covert badge readers that can be deployed as wall implants or clipboard cloners to capture credentials remotely
• Long-range "gooseneck" readers disguised as parking pedestals can capture badge data from up to 3 feet away without user interaction
• Binary data from captured badges must be converted to hex format to work with Flipper Zero, which can then emulate or write cloned credentials to blank cards
• Multiclass readers are particularly vulnerable to downgrade attacks where high-frequency encrypted data can be cloned onto low-frequency unencrypted cards
• Real-world testing demonstrates how these techniques allow unauthorized access to secure facilities, often enhanced by simple social engineering tactics

The presentation concludes with real-world stories demonstrating how these techniques allow security testers to gain unauthorized access to secure facilities, emphasizing the importance of proper security measures to prevent such attacks.