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 to their objective.
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: 100 (version history)
Added (Elastic Stack release): 7.10.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
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 by unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Investigation guide
editRule query
editevent.dataset:azure.activitylogs and azure.activitylogs.operation_name :"MICROSOFT.NETWORK/FIREWALLPOLICIES/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/
Rule version history
edit- Version 100 (8.5.0 release)
-
- Formatting only
- Version 8 (8.4.0 release)
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- Formatting only
- Version 6 (8.1.0 release)
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- Formatting only
- Version 5 (7.13.0 release)
-
- Formatting only
- Version 4 (7.12.0 release)
-
-
Updated query, changed from:
event.dataset:azure.activitylogs and azure.activitylogs.operation_name :MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE and event.outcome:(Success or success)
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- Version 3 (7.11.2 release)
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- Formatting only
- Version 2 (7.11.0 release)
-
-
Updated query, changed from:
event.dataset:azure.activitylogs and azure.activitylogs.operation_name :MICROSOFT.NETWORK/FIREWALLPOLICIES/DELETE and event.outcome:Success
-