Data Prevalence: The Game Changer in Threat Detection & IR

The article advocates using data prevalence and baselining to improve threat detection and incident response, shifting from static rules to prevalence-aware logic that reduces noise. It highlights Microsoft Defender XDR’s FileProfile global prevalence and provides a KQL template that combines behavior patterns with low-prevalence constraints (e.g., DLL loads by rare userland executables) for resilient, high-fidelity detections. It also encourages detection product teams to embed prevalence features into UX to unlock greater value.