Router IOS Image Patched via Remote SSH

Darshan Thummar@Mighty

•updated Jun 11, 2026•0•0•5

This rule detects attempts to patch a Cisco IOS router image remotely via SSH. It specifically looks for the string "copy tftp flash" within TCP traffic destined for port 22 (SSH) on the home network, indicating a potential attempt to modify the router's operating system image from a TFTP server.