Open-Source Security Operations Center (SOC)

3Security Incident Response

The Incident Response Lifecycle

Responding effectively to cybersecurity incidents requires a comprehensive, systematic process for moving from initial detection through containment, remediation, and recovery. The incident response lifecycle defines the key phases that incident responders and security operations centers navigate to efficiently manage all aspects of a breach or attack. Proper execution of each step strengthens defenses while minimizing operational disruption.

Triage

Triage entails assessing alerts from various detection systems like endpoints, firewalls, and security information and event management (SIEM) to validate potential incidents requiring investigation. Analysts apply experience, threat intelligence, and malware analysis skills to rapidly separate true positives from false alarms and prioritize likely threats (Sukianto 2023).

Prioritization considers factors like compromised account usage, attempted lateral movement, and other indicators of compromise (IoCs). Escalating confirmed events for a full response while designating remaining alerts for follow-up monitoring optimizes resources. Effective triage prevents overload from noise.

Investigation and Analysis

Once triaged, the deeper forensic investigation aims to thoroughly understand attack mechanics and impacts. Responders conduct host and network-based data collection, preserve full disk/memory images as evidence, and extensively analyze all related artifacts and behaviors. ...