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MediumSigmaHQ Austin Songer @austinsonger

Google Cloud Firewall Modified or Deleted

Detects when a firewall rule is modified or deleted in Google Cloud Platform (GCP).

Detection logic

Detection requirements

Platform: Containers ESXi IaaS Linux macOS Network Devices Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: gcp
Log source service: gcp_audit

Known benign triggers

Exceptions can be added to this rule to filter expected behavior.
Firewall rules being modified or deleted may be performed by a system administrator. Verify that the firewall configuration change was expected.

References

Links the source published beside this detection. Reference is the link the source wrote, unmodified. Class is decided by this catalogue from the host and path, not stated by the source. Cited by counts published detections citing the same resource, including this one, and the sources beneath it count the repositories this catalogue ingests, which is not the same as independent research.
Reference	Class	Cited by
cloud.google.com/kubernetes-engine/docs/how-to/audit-logging	Product documentation	12from 2 sources
developers.google.com/resources/api-libraries/documentation/compute/v1/java/latest/com/google/api/services/compute/Compute.Firewalls.html	Unclassified	Only this detection cites it

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