The CredDefense Toolkit

This post introduces the free, open-source CredDefense Toolkit for detecting and preventing common credential-abuse techniques in Active Directory environments. It covers a Windows Password Filter to block weak choices (e.g., season-year patterns), a Password Auditing feature leveraging DSInternals to identify reuse and risky settings, Windows Event Forwarding consolidation, Kerberoasting detection using a honey account with SPN and Event ID 4769 parsing, ResponderGuard to discover NBNS/LLMNR spoofers and submit honey credentials for alerting, and password spraying detection via event-log analysis.