Fire Ant Packet-Triggered Backdoor Magic String Activation

Arnold Chan@slaz

•updated Sep 4, 2026•0•0•1

Detects incoming TCP and UDP traffic containing the 'sxcdewqaz!@#' magic string. This pattern is characteristic of a packet-triggered backdoor (often referred to as 'Fire Ant'), which uses custom packet payloads to activate malicious functionality on a listening host.