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SOC 247
ITSP.10.17198
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33 controls

CC7.2Monitoring for anomalies and security eventsSOC 2System Operations

Official Requirement

The entity monitors system components and the operation of those components for anomalies that are indicative of malicious acts, natural disasters, and errors affecting the entity's ability to meet its objectives; anomalies are analyzed to determine whether they represent security events.

Source: AICPA Trust Services Criteria (2017), incorporating COSO principles

In Plain English

Your SIEM or monitoring stack ingests logs from all relevant systems, servers, network devices, identity providers, and has detection rules that surface anomalies worth investigating. Finding an anomaly isn't enough; you need a documented process for triaging it and deciding whether it rises to a security event. Auditors will ask to see alerts that fired AND evidence they were reviewed.

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The Trust Services Criteria referenced in this tool are published by the American Institute of Certified Public Accountants (AICPA) and incorporate principles from the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Criteria descriptions are reproduced for reference purposes. All implementation guidance, evidence recommendations, and control language are original work by Truvo Cyber. ISO 27001 and ISO 42001 are standards published by the International Organization for Standardization (ISO). Framework and standard names are the property of their respective owners. This tool is not affiliated with, endorsed by, or certified by AICPA, COSO, or ISO.

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On-premises implementation and evidence

SIEM with centralized log aggregation and alert triage

Implementation steps

  1. Configure your SIEM/monitoring platform to ingest logs from all production servers, the firewall appliance (syslog), your IDS/network monitoring platform (IDS alerts), and Active Directory event logs
  2. Enable your SIEM/monitoring platform's built-in detection rules for authentication failures, privilege escalation, rootkit indicators, and web attack patterns; tune false positives by creating custom rule exclusions
  3. Set up your SIEM/monitoring platform email or webhook alerts for high-severity rules; the ISM must review and disposition each alert within a defined SLA
  4. Maintain a Security Monitoring Log: a running record of alerts reviewed, triage notes, and outcome, this is the primary audit artifact for CC7.2

Tools / systems

Evidence artifacts

Evidence frequency: Continuous ingestion; ISM reviews alerts daily; Security Monitoring Log updated per alert