The "Cisco Secure Firewall - Static Tundra Smart Install Abuse" rule aims to identify suspicious activities related to the exploitation of the Cisco Smart Install (SMI) protocol by the threat actor known as Static Tundra. Leveraging the Cisco Secure Firewall Threat Defense Intrusion Event logs, this analytic focuses on detecting patterns of activity that suggest attempts at executing a denial-of-service attack or triggering a buffer overflow in vulnerable Cisco hardware. The detection mechanism is triggered when a predefined set of Cisco Smart Install-related Snort signatures is matched multiple times from a single source IP within a 15-minute window, indicating potential active exploitation or reconnaissance efforts targeting Cisco devices that have the Smart Install feature enabled. The rule aims not only to enhance security monitoring but also to facilitate timely responses to emerging threats against Cisco infrastructure.