The Cybersecurity and Infrastructure Security Agency (CISA) published an advisory detailing lessons from red team assessments conducted for two critical infrastructure organizations. The assessments, which simulated adversarial cyber operations, revealed stark differences in defensive responses. In one case, the red team remained undetected after gaining access to systems and moving laterally. In another, initial access was detected and quarantined, forcing the team to shift tactics. CISA emphasizes the need for robust baselines, improved alert filtering, elimination of organizational silos, and proper security controls for cloud environments. The advisory highlights that effective threat detection and response require more than tools, stressing the importance of monitoring and streamlined processes. CISA encourages organizations to review the findings and implement recommended mitigations to enhance resilience against cyber threats.
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