Azure Diagnostic Settings Deletion

Identifies the deletion of diagnostic settings in Azure, which send platform logs and metrics to different destinations. An adversary may delete diagnostic settings in an attempt to evade defenses.

Rule type: query

Rule indices:

filebeat-*
logs-azure*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-25m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://docs.microsoft.com/en-us/azure/azure-monitor/platform/diagnostic-settings

Tags:

Elastic
Cloud
Azure
Continuous Monitoring
SecOps
Monitoring

Version: 7

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

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

Framework: MITRE ATT&CK^TM

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/
Sub-technique:
- Name: Disable or Modify Tools
- ID: T1562.001
- Reference URL: https://attack.mitre.org/techniques/T1562/001/

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