Azure Frontdoor Web Application Firewall (WAF) Policy Deleted
editAzure Frontdoor Web Application Firewall (WAF) Policy Deleted
editIdentifies the deletion of a Frontdoor Web Application Firewall (WAF) Policy in Azure. An adversary may delete a Frontdoor Web Application Firewall (WAF) Policy in an attempt to evade defenses and/or to eliminate barriers in carrying out their initiative.
Rule type: query
Rule indices:
- filebeat-*
- logs-azure*
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): 7.16.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Potential false positives
editAzure Front Web Application Firewall (WAF) 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. Azure Front Web Application Firewall (WAF) 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
edit## Config The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
Rule query
editevent.dataset:azure.activitylogs and azure.activitylogs.operation_name :"MICROSOFT.NETWORK/FRONTDOORWEBAPPLICATIONFIREWALLPOLICIES/DELETE" and event.outcome:(Success or success)
Threat mapping
editFramework: 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/