Cross-Domain Trust Kerberos Authentication Abuse
This rule detects potential Kerberos authentication abuse related to cross-domain trusts. It specifically looks for TCP traffic on port 88 (Kerberos) to the home network, containing the byte '6b' at the first position of the payload. A threshold of 20 occurrences within 10 seconds from the same source IP is set to trigger an alert, indicating a potential brute-force or rapid authentication attempt.
Suricata
