GCP Firewall Rule Deletionedit
Identifies when a firewall rule is deleted 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 delete a firewall rule in order to weaken their target’s security controls.
Rule type: query
Rule indices:
- filebeat-*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- GCP
- Continuous Monitoring
- SecOps
- Configuration Audit
Version: 1
Added (Elastic Stack release): 7.10.0
Rule authors: Elastic
Rule license: Elastic License
Potential false positivesedit
Firewall rules may be deleted by system administrators. Verify that the firewall configuration change was expected. Exceptions can be added to this rule to filter expected behavior.
Investigation guideedit
The GCP Filebeat module must be enabled to use this rule.
Rule queryedit
event.dataset:googlecloud.audit and event.action:v*.compute.firewalls.delete
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/