What it is
Security Information and Event Management (SIEM) platforms combine log management, event correlation, and real-time monitoring into a centralized security analytics system. They aggregate data from firewalls, servers, applications, endpoints, and network devices, allowing analysts to detect anomalies and coordinate response activities.
SIEM tools use correlation rules, machine learning, and behavior analytics to identify suspicious activity such as brute-force attempts, privilege escalations, or lateral movement. They also provide dashboards, alerting, and audit trails for compliance with frameworks like ISO 27001, SOC 2, and PCI DSS.
Why it matters
Without centralized visibility, security teams struggle to identify complex attacks that span multiple systems. SIEM bridges that gap, enabling faster detection and evidence gathering during incidents. It forms the backbone of modern Security Operations Centers (SOCs), integrating with endpoint detection and response, threat intelligence, and security orchestration automation and response tools.
How to reduce risk
- Integrate logs from all critical assets into the SIEM.
- Continuously tune correlation rules to reduce false positives.
- Combine SIEM with SOAR tooling for automated responses.
- Regularly review log retention and compliance policies.
- Train analysts to interpret SIEM alerts efficiently.