What is Continuous Monitoring?

What is Continuous Monitoring?

Continuous monitoring is the practice of maintaining ongoing awareness of an organization's security posture, vulnerabilities, and threats through automated and manual observation of systems, controls, and processes. Rather than assessing security at periodic intervals, continuous monitoring provides real-time or near-real-time visibility into the effectiveness of security controls and the current threat landscape.

Why continuous monitoring matters

Traditional point-in-time assessments (such as annual audits or quarterly scans) provide snapshots of security posture but miss what happens between assessments. Continuous monitoring fills this gap by:

• Detecting threats and vulnerabilities as they emerge, not months later
• Verifying that controls remain effective on an ongoing basis
• Identifying configuration drift and unauthorized changes
• Providing evidence of sustained compliance for auditors
• Enabling faster response to security incidents
• Reducing the risk of surprises during audit cycles

What to monitor

Continuous monitoring spans multiple domains:

Security controls:

• Are access controls still properly configured?
• Are encryption mechanisms active and using current standards?
• Are security policies being followed?
• Are patches being applied within defined timeframes?

Systems and infrastructure:

• Are systems operating normally?
• Are there unauthorized configuration changes?
• Are there new vulnerabilities affecting your environment?
• Are all endpoints protected with current security agents?

User activity:

• Are there unusual access patterns or privilege escalations?
• Are terminated users' accounts being deactivated promptly?
• Are there failed authentication attempts indicating brute-force attacks?

Compliance status:

• Are all required controls implemented and operating?
• Is evidence being collected on schedule?
• Are policy reviews and updates happening as planned?
• Are vendor assessments current?

Continuous monitoring in compliance frameworks

• SOC 2 — CC4.1 and CC4.2 require ongoing monitoring of the internal control system and evaluation of deficiencies
• ISO 27001 — clause 9 (Performance evaluation) requires monitoring, measurement, analysis, and evaluation of the ISMS
• NIST CSF — DE.CM (Continuous Monitoring) specifically addresses monitoring information systems and assets for cybersecurity events
• NIST SP 800-137 provides detailed guidance on Information Security Continuous Monitoring (ISCM)

Implementing continuous monitoring

1. Define monitoring objectives — determine what needs to be monitored based on risk assessment and compliance requirements
2. Select monitoring tools — deploy appropriate technologies:
   • SIEM (Security Information and Event Management) for log aggregation and correlation
   • EDR (Endpoint Detection and Response) for endpoint monitoring
   • Vulnerability scanners for continuous vulnerability assessment
   • Configuration management tools for drift detection
   • GRC platforms for compliance monitoring
3. Establish baselines — define normal operating parameters so deviations can be detected
4. Configure alerts — set meaningful alert thresholds to balance detection with alert fatigue
5. Define response procedures — establish processes for responding to monitoring alerts
6. Review and improve — regularly assess monitoring effectiveness and adjust as needed

Continuous monitoring vs continuous compliance

While related, these concepts differ:

• Continuous monitoring focuses on security — detecting threats, vulnerabilities, and anomalies in real time
• Continuous compliance focuses on maintaining compliance posture — ensuring controls remain effective and evidence stays current

An effective program addresses both. Security monitoring feeds compliance evidence, and compliance monitoring ensures security controls do not degrade.

Common challenges

• Alert fatigue from too many low-priority notifications
• Gaps in monitoring coverage across all systems
• Insufficient resources to investigate and respond to alerts
• Monitoring tools that generate data but lack actionable insights
• Difficulty correlating events across disparate systems

How episki helps

episki provides continuous compliance monitoring by tracking control effectiveness, evidence collection status, and policy review schedules. The platform integrates with security tools to pull monitoring data into your compliance program and alerts you when controls need attention. Learn more on our compliance platform.