QuestionQ33

Detection engineering

You are creating a new detection rule in Google Security Operations (SecOps). You are defining YARA-L logic that contains complex event, match, and condition sections. You need to develop and test the rule to ensure detections are accurate before migrating it to production, while minimizing impact on production processes. What should you do?

  • A Develop the rule logic in the UDM search, review the search output to inform changes to filters and logic, and copy the rule into the Rules Editor.
  • B Use Gemini in Google SecOps to develop the rule by providing a description of the parameters and conditions, and transfer the rule into the Rules Editor.
  • C Develop the rule in the Rules Editor, define the sections the rule logic, and test the rule using the test rule feature.
  • D Develop the rule in the Rules Editor, define the sections of the rule logic, and test the rule by setting it to live but not alerting. Run a YARA-L retrohunt from the rules dashboard.
Explanation

The Google SecOps Rules Editor is designed to create and refine YARA-L detection rules and includes the Run test feature for executing a custom rule against historical events in a selected time range. Test detections are not persisted and do not create alerts, allowing safe iteration without affecting production processes.

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