Azure Firewall Policy Deletion
editAzure Firewall Policy Deletion
editIdentifies 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 in carrying out their initiative.
Rule type: query
Rule indices:
- filebeat-*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-25m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- Azure
- Continuous Monitoring
- SecOps
- Network Security
Version: 1
Added (Elastic Stack release): 7.10.0
Rule authors: Elastic
Rule license: Elastic License
Potential false positives
editFirewall 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 from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Investigation guide
editThe Azure Filebeat module must be enabled to use this rule.
Rule query
editevent.dataset:azure.activitylogs and azure.activitylogs.operation_name :MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE and event.outcome:Success
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Disabling Security Tools
- ID: T1089
- Reference URL: https://attack.mitre.org/techniques/T1089/