Identifies 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
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
- Continuous Monitoring
- Network Security
Added (Elastic Stack release): 7.16.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Azure 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.
## Config The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
event.dataset:azure.activitylogs and azure.activitylogs.operation_name :"MICROSOFT.NETWORK/FRONTDOORWEBAPPLICATIONFIREWALLPOLICIES/DELETE" and event.outcome:(Success or success)
Framework: MITRE ATT&CKTM
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/
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