SAM Database Accessed via Remote SMB

Darshan Thummar@Mighty

•updated Jun 11, 2026•0•0•5

This rule detects attempts to access the Security Account Manager (SAM) database remotely over Server Message Block (SMB). It specifically looks for TCP traffic on port 445 (SMB) directed to the home network, containing the string "\SAM" (case-insensitive) and "NtOpenFile" (case-insensitive). This combination suggests an attempt to open the SAM database file, which could indicate credential access attempts.