Identifies when a firewall rule is modified in Google Cloud Platform (GCP). Virtual Private Cloud (VPC) firewall rules can be configured to allow or deny connections to or from virtual machine (VM) instances. An adversary may modify a firewall rule in order to weaken their target’s security controls.
Rule type: query
Risk score: 47
Runs every: 5 minutes
Maximum alerts per execution: 100
- Continuous Monitoring
- Configuration Audit
Version: 3 (version history)
Added (Elastic Stack release): 7.10.0
Last modified (Elastic Stack release): 7.11.2
Rule authors: Elastic
Rule license: Elastic License
Firewall rules may be modified by system administrators. Verify that the firewall configuration change was expected. Exceptions can be added to this rule to filter expected behavior.
The GCP Filebeat module must be enabled to use this rule.
event.dataset:(googlecloud.audit or gcp.audit) and event.action:v*.compute.firewalls.patch
Framework: MITRE ATT&CKTM
- Version 3 (7.11.2 release)
- Formatting only
- Version 2 (7.11.0 release)
Updated query, changed from:
event.dataset:googlecloud.audit and event.action:v*.compute.firewalls.patch