Reliably Detecting Pass the Hash Through Event Log Analysis

This blog post from Binary Defense explains how to detect Pass-the-Hash (PtH) activity by analyzing Windows security event logs, focusing on Event ID 4624 with Logon Type 3, Logon Process NtLmSsp, a session Key Length of 0, and filtering for local accounts to reduce false positives; it includes practical notes on GPO settings, common false positives (e.g., OWA), and investigative tips such as using source IP and hostname to track the origin of PtH attempts.