ISO 27001 Annex : A.12.7 Information Systems Audit Considerations

A.12.7.1  Information Systems Audit Controls

Control- The audit criteria and activities related to operating system verification should be carefully prepared and decided in order to reduce business process disturbance.

Implementation Guidance – It is necessary to follow the following guidance:

1. audit standards for access to systems and data should be negotiated with appropriate management;
2. Scope should be agreed and controlled on the technical audit tests;
3. Audit processing should be restricted to read-only access to applications and data;
4. Access, rather than read-only, should only be permitted for isolated copies of system files, which should be deleted when the audit is completed, or provided with adequate security where such files are needed to be held in accordance with the documenting audit requirements;
5. The criteria for special or additional processing should be defined and decided upon;
6. Audit tests that could affect the availability of the system should be carried out outside business hours;
7. To create a reference trail, all access should be controlled and logged.

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