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ITSP.10.17198
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33 controls

CC7.3Evaluation of security events as security incidentsSOC 2System Operations

Official Requirement

The entity evaluates security events to determine whether they could or have resulted in a failure of the entity to meet its objectives (security incidents) and, if so, takes actions to prevent or address such failures.

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

In Plain English

Not every alert is an incident, but you need a documented decision process for making that call. When an alert fires, someone evaluates it, decides whether it's a security incident, and if so, triggers the incident response process. The evaluation itself needs to be recorded, auditors want to see that triage happened and that the criteria for 'incident' are defined, not ad-hoc.

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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

Documented incident classification and triage process

Implementation steps

  1. Document incident severity tiers in the Incident Response Plan with concrete examples (e.g., P1: ransomware active on a production server; P2: unauthorized admin account created; P3: repeated failed SSH logins from external IP)
  2. For each your SIEM/monitoring platform or your IDS/network monitoring platform alert the ISM reviews, log the assessment in the Security Monitoring Log: alert ID, severity, analyst assessment, escalated Y/N, and if escalated, the IR ticket number
  3. Maintain an Incident Register: a running list of all confirmed security incidents during the audit period with date, classification, and resolution summary
  4. Ensure the IR Plan defines the decision criteria for when to notify leadership, legal, or customers, auditors will ask whether you have escalation thresholds

Tools / systems

Evidence artifacts

Evidence frequency: Per-alert logging; Incident Register maintained continuously; IR Plan reviewed annually