https://israel-fernandez.com/blog Long-form notes on systems programming, embedded firmware, and Android security research. en-us Thu, 07 May 2026 01:48:10 GMT https://israel-fernandez.com/blog/building-a-c2-framework https://israel-fernandez.com/blog/building-a-c2-framework Sun, 15 Mar 2026 00:00:00 GMT A deep dive into building a multi-transport Remote Access Trojan for educational security research covering TCP binary framing, mutual TLS, and a beacon/callback architecture. SecurityPythonCNetworkingRed Team