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Azure Event Hub Deletion

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Azure Event Hub Deletion

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Identifies an Event Hub deletion in Azure. An Event Hub is an event processing service that ingests and processes large volumes of events and data. An adversary may delete an Event Hub in an attempt to evade detection.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-azure*

Severity: medium

Risk score: 47

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
  • Log Auditing

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

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Event Hub 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. Event Hub 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

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Rule query
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event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:"MICROSOFT.EVENTHUB/NAMESPACES/EVENTHUBS/DELETE" and
event.outcome:(Success or success)











Threat mapping
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Framework: MITRE ATT&CKTM














Rule version history
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Version 100 (8.5.0 release)








    

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Version 8 (8.4.0 release)








    

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Version 6 (8.1.0 release)








    

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Version 5 (7.13.0 release)








    

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Version 4 (7.12.0 release)








    

  • 

    Updated query, changed from:
    

    

    

    event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:MICROSOFT.EVENTHUB/NAMESPACES/EVENTHUBS/DELETE and
event.outcome:(Success or success)
    

    

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Version 3 (7.11.2 release)








    

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Formatting only

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Version 2 (7.11.0 release)








    

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    Updated query, changed from:
    

    

    

    event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:MICROSOFT.EVENTHUB/NAMESPACES/EVENTHUBS/DELETE and
event.outcome:Success
    

    

    • 




















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