A backdoor that makes no noise is hard to catch, and that’s the point of BPFDoor. The Linux malware waits for a special “magic packet” before it acts. In this interview with Help Net Security, Christiaan Beek, VP of Rapid7 Intelligence, explains why its operators go after mail gateways and other edge devices that can’t run endpoint agents, and why a hacked telecom network can put a whole nation at…