Less Praying More Relaying – Enumerating EPA Enforcement for MSSQL and HTTPS
SpecterOps released RelayInformer, a Python tool and Cobalt Strike BOF suite that enumerates Extended Protection for Authentication (EPA) enforcement across MSSQL, HTTP/S, and LDAPS services. The research demonstrates methodologies for detecting all three EPA enforcement levels (Disabled, Allowed/When Supported, Required) by manipulating NTLM AV pairs and analyzing server responses, enabling attackers to determine relay feasibility before investing in coercion and tunneling infrastructure.