Detective controls in the FedRAMP High baseline are not just checkboxes. They are the constant eyes and ears of your system, tracking, alerting, and preserving evidence so you can prove compliance and spot threats in time. If you want your environment authorized, you need them stable, automated, and verifiable.
The High baseline is designed for systems handling the most sensitive unclassified data. That means strict monitoring, detailed event logging, and reporting mechanisms that can stand up to scrutiny from the toughest assessors. The detective controls here go far beyond light-touch logging—they demand comprehensive coverage across infrastructure, applications, and network boundaries.
Every action and change must be recorded. Audit logs must be time-synced, immutable, and preserved according to retention requirements. Alerts have to trigger on suspicious patterns or activity tied to privileged accounts, failed logins, and unauthorized configuration changes. The system must give you evidence in minutes, not days.
NIST SP 800-53 often drives these controls, mapping to FedRAMP High with categories like AU (Audit and Accountability), SI (System and Information Integrity), and CA (Security Assessment and Authorization). Implementation means pulling data from across your environment into a centralized, secured location where it can be analyzed and reported in real-time. If you cannot trust the accuracy, availability, and security of that data, it will not meet the High baseline.