Incident Response

Incident response (IR) is a structured methodology for managing the aftermath of a security breach or cyberattack. It aims to limit damage, reduce recovery time, and minimize cost. IR typically follows the framework defined in NIST SP 800-61, which organizes activities into four phases: Preparation; Detection and Analysis; Containment, Eradication, and Recovery; and Post-Incident Activity.

Without a defined IR process, organizations react chaotically to breaches — destroying evidence, failing to contain lateral movement, and prolonging attacker dwell time. A well-executed IR process reduces business impact, satisfies regulatory notification requirements, and produces actionable findings to harden defenses.

IR teams triage alerts to confirm incidents, then move through containment (isolating affected systems), eradication (removing malware or attacker footholds), and recovery (restoring normal operations). Throughout, forensic evidence is collected to understand the full attack chain. Findings feed post-incident reports and detection improvements.