NIST DE.CM-3: Personnel Activity Monitoring for Threat Detection

What this means

DE.CM-3 requires organizations to establish monitoring systems that track personnel activity across networks and systems to identify anomalies and potential security incidents. This includes monitoring user logins, privileged account usage, data access patterns, and system configuration changes. The goal is early detection of cybersecurity events, whether from malicious insiders, compromised credentials, or unauthorized access attempts. Effective monitoring balances security visibility with privacy and operational efficiency.

How to comply

1. 1.Deploy logging mechanisms on critical systems, applications, and network infrastructure to capture user activities and system events
2. 2.Define baseline activity patterns for normal user behavior to establish detection thresholds
3. 3.Implement real-time or near-real-time alerting for suspicious activities like failed login attempts, privilege escalation, or unusual data access
4. 4.Monitor privileged accounts and administrative activities with enhanced logging and review procedures
5. 5.Establish a centralized log management system to aggregate and correlate events across systems
6. 6.Conduct regular log reviews and analysis to identify anomalies and patterns indicative of security events
7. 7.Document monitoring policies, procedures, and retention requirements in your security policy
8. 8.Train personnel on monitoring procedures and ensure management approval of monitoring practices

Evidence auditors look for

• System and application logs showing user login attempts, timestamps, and authentication results
• Access control logs documenting file and resource access by user and privilege level
• Privileged account activity logs with administrative actions and configuration changes
• Security Information and Event Management (SIEM) dashboards and alert configurations
• Log retention policy documentation with defined retention periods
• Incident response records showing detected events and remediation actions
• Network monitoring reports showing unusual traffic patterns or data exfiltration attempts
• User activity reports from directory services or identity management systems

Frequently asked questions

GRCWatch automates personnel activity monitoring by centralizing logs from your systems and applications, configuring NIST-aligned alerts, and generating compliance reports—eliminating manual log reviews and reducing the time your team spends on DE.CM-3 evidence collection.

See how GRCWatch handles this control automatically

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