QuestionQ19

Detection engineering

Your Google Security Operations (SecOps) instance is producing a high volume of alerts for an IP address that recently appeared in a threat-intelligence feed. Multiple vendors flag the IP address as a known command-and-control (C2) server. The IP address is present in repeated DNS queries from a sandboxing system and test environment used by your malware-analysis team. You want to prevent alert fatigue while retaining visibility if the IOC appears again in real production telemetry. What should you do?

  • A Temporarily disable the rule to avoid unnecessary alerts until the IOC expires in the threat feed.
  • B Add the IP address to a Google SecOps reference list, and configure the rule to suppress alerts for that list.
  • C Reduce the severity score in the rule configuration when the IOC match occurs in any internal IP address range.
  • D Add an exception in the detection rule to exclude matches originating from specific asset groups.
Explanation

A detection-rule exception that excludes matches from the specific sandboxing and test asset groups suppresses the known benign analysis activity without suppressing the same C2 IOC when it appears in production telemetry. Google SecOps rule exclusions can prevent specified events from being evaluated by a particular rule or rule set.

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