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.

t1562
gcp
elastic

Techniques

T1562

Sample rules

GCP Firewall Rule Deletion

source: elastic
technicques:
- T1562

Description

Identifies when a firewall rule is deleted in Google Cloud Platform (GCP) for Virtual Private Cloud (VPC) or App Engine. These firewall rules can be configured to allow or deny connections to or from virtual machine (VM) instances or specific applications. An adversary may delete a firewall rule in order to weaken their target’s security controls.

Detection logic

event.dataset:gcp.audit and event.action:(*.compute.firewalls.delete or google.appengine.*.Firewall.Delete*Rule)