cd00r - S1204 (00936d7a-451d-4a9c-88fc-05b141aa2d3f)
cd00r is an open-source backdoor for UNIX and UNIX-variant operating systems that was orginally released in 2000. cd00r source code is primarily based on a packet-capturing program as it utilizes a sniffer to listen for specific sequences of network traffic or "secret knock" before executing the attacker's code.(Citation: Hartrell cd00r 2002)(Citation: Lumen J-Magic JAN 2025)