ATT&CK T1134 - Kerberos TGT Request Anomaly

Darshan Thummar@Mighty

•updated Jun 10, 2026•0•0•1

This rule detects an anomaly in Kerberos Ticket Granting Ticket (TGT) requests. Specifically, it triggers an alert if more than 50 UDP Kerberos TGT requests are observed from a single source IP address within a 10-second window to the home network on port 88. This behavior could indicate an attempt to enumerate valid user accounts or perform credential stuffing/brute-force attacks against the Kerberos authentication system, potentially as part of a privilege escalation attempt (ATT&CK T1134).