LoFP / firewall policy deletions may be done by a system or network administrator. verify whether the username, hostname, and/or resource name should be making changes in your environment. firewall policy deletions by unfamiliar users or hosts should be investigated. if known behavior is causing false positives, it can be exempted from the rule.

Techniques

• T1562

Sample rules

Azure Firewall Policy Deletion

• source: elastic
• technicques:
  • T1562

Description

Identifies the deletion of a firewall policy in Azure. An adversary may delete a firewall policy in an attempt to evade defenses and/or to eliminate barriers to their objective.

Detection logic

event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE" and event.outcome:(Success or success)