ISO/IEC 27001:2022·Annex A A.8.34·high·Component: Technological controls

What this control requires

Audit tests and other assurance activities involving assessment of operational systems shall be planned and agreed between the tester and appropriate management.
— ISO/IEC 27001:2022, Annex A A.8.34

In plain English

Audit tests and other assurance activities involving assessment of operational systems shall be planned and agreed between the tester and appropriate management. In practice, this means you can prove you policy information-level controls on a defined cadence.

Why it matters

ISO 27001 certification depends on showing each Annex A control is either implemented or explicitly justified for exclusion in the Statement of Applicability (SoA). Certification bodies sample controls during surveillance audits, and a missing SoA entry — or implementation that doesn't match the SoA wording — is a finding.

This control is rated high. Auditors expect a named owner, a remediation SLA, and a tooling artefact that evidences continuous operation.

What an auditor looks for

An ISO 27001 lead auditor looks for: (1) an SoA entry covering the control with justification, (2) a documented procedure or policy implementing it, (3) records that prove the procedure runs (logs, tickets, training records) and (4) management-review evidence that effectiveness is monitored.

Within Technological controls, the assessor will trace your implementation back to the catalogue reference (Annex A A.8.34) and look for objective evidence on the latest two assessment cycles.

How to implement

Code Review Testing

Pipeline. Require at least one human reviewer plus passing CI (lint, type, unit, security scan) before merge — protected branches enforce this.

Logging Monitoring

AWS. Org-trail CloudTrail to a central log archive account, GuardDuty in every region, and Security Hub for cross-source correlation.

Azure. Pipe every diagnostic setting into a central Log Analytics workspace; onboard Microsoft Sentinel for SIEM/SOAR.

GCP. Aggregate audit logs in a dedicated logging project with sink to BigQuery; enable Security Command Center Premium and route findings to Chronicle SIEM.

Policy Management

Docs. Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA.

Operational checklist

  • Policy. Document the trigger, the owner and the cadence.
  • Information. Document the trigger, the owner and the cadence.
  • Management. Document the trigger, the owner and the cadence.
  • Assessment. Document the trigger, the owner and the cadence.
  • Protection. Document the trigger, the owner and the cadence.
  • Scope: information, management.

Evidence to collect

  • Policy Document. A signed and version-controlled policy / standard / procedure document.
  • Ticketing Workflow. ticketing_workflow evidence
  • Infra Scan. Continuous infrastructure-posture telemetry — AWS Config, Azure Policy compliance, GCP Organisation Policy, Wiz / Prisma findings.

Planned audit test tickets and documented safeguards protect operational systems during assessments.

Common pitfalls

  • Per-account logging that nobody stitches together at the org level — incidents that cross accounts go undetected for days.
  • Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced.
  • Scans that hit only the perimeter; missing authenticated scans of OS, runtime libs and base images so most CVEs are invisible.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

Related controls in ISO/IEC 27001:2022

References

Topics: governance riskcode review testinglogging monitoringpolicy managementvulnerability management