Assessment and decision on information security events
The organization should assess information security events and decide if they are to be categorized as information security incidents.
Purpose
To ensure consistent evaluation and appropriate response to security events.
Implementation Guidance
Define criteria for classifying events as incidents
Establish triage procedures for security events
Document decision-making processes and outcomes
Maintain logs of all security events and assessments
Train personnel on event classification
Recommended Tools
Wazuh
Open-source SIEM and XDR platform. Best free option for comprehensive security monitoring.
Datadog
Comprehensive monitoring and security platform. Great for teams that need unified observability.
BetterStack
Modern uptime monitoring and incident management. Great UX and affordable pricing for startups.
AWS GuardDuty
Managed threat detection service for AWS. Automatically monitors for malicious activity.
ISO 27001 Services from the Directory
These providers can help you implement A.5.25 and achieve ISO 27001 certification.

Advisera
Provider of ISO 27001 documentation, training, and consultancy services to help businesses achieve compliance.

Anecdotes
Enterprise agentic GRC platform with 230+ integrations and 40+ pre-mapped frameworks for Fortune 500 compliance programs.

Arrow Cyber Advisors
Arrow Cyber Advisors enables organizations to build measurable cybersecurity maturity and resilience. We specialize in governance, risk and compliance advisory, providing clear security direction, maturity benchmarking, and execution support tailored to regulated and high-risk environments.

Atoro
Atoro offers specialized ISO 27001 certification services for SaaS companies, simplifying compliance with expert tools.

AuditBoard
Enterprise connected risk platform trusted by over 50% of the Fortune 500 for audit, risk, and compliance management.

Bitsecura
*** Helping Businesses Achieve Compliance & Certification Success *** Bitsecura is a IT governance, risk, and compliance (GRC) firm specialising in helping organisations protect their critical assets, navigate complex regulatory landscapes, and build sustainable cybersecurity frameworks. With over 20 years of industry experience, we offer strategic guidance, bespoke solutions, and operational support that align seamlessly with your business objectives. Our commitment to practical innovation and long-term partnerships ensures that working with Bitsecura not only strengthens your current security posture, but also builds a lasting foundation for future resilience.
Related Controls
Other controls in Organizational Controls
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