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Elastic Docs ›Elastic Security Solution [8.4] ›Detections and alerts ›Prebuilt rule reference

Azure Virtual Network Device Modified or Deleted

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Azure Virtual Network Device Modified or Deleted

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Identifies when a virtual network device is modified or deleted. This can be a network virtual appliance, virtual hub, or virtual router.

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
  • Impact

Version: 4 (version history)

Added (Elastic Stack release): 7.16.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Austin Songer

Rule license: Elastic License v2

Potential false positives

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Virtual Network Device modification or deletion may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Virtual Network Device modification or deletion by unfamiliar users 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.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/WRITE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/DELETE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/JOIN/ACTION" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/DELETE" or
"MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/DELETE" or
"MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/WRITE" or
"MICROSOFT.NETWORK/VIRTUALHUBS/DELETE" or
"MICROSOFT.NETWORK/VIRTUALHUBS/WRITE" or
"MICROSOFT.NETWORK/VIRTUALROUTERS/WRITE" or
"MICROSOFT.NETWORK/VIRTUALROUTERS/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 4 (8.4.0 release)








    

  • 

    Updated query, changed from:
    

    

    

    event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:("MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/WRITE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/DELETE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/JOIN/ACTION" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/DELETE" or
"MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/DELETE" or
"MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/WRITE" or
"MICROSOFT.NETWORK/VIRTUALHUBS/DELETE" or
"MICROSOFT.NETWORK/VIRTUALHUBS/WRITE" or
"MICROSOFT.NETWORK/VIRTUALROUTERS/WRITE" or
"MICROSOFT.NETWORK/VIRTUALROUTERS/DELETE") and event.outcome:(Success
or success)
    

    

    • 









Version 2 (8.1.0 release)








    

  • 

    Updated query, changed from:
    

    

    

    event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:("MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/WRITE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/DELETE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/JOIN/ACTION" or
"MICROSOFT.NETWORK/NETWORKINTERFACES/DELETE"or
"MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/DELETE" or
"MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/WRITE" or
"MICROSOFT.NETWORK/VIRTUALHUBS/DELETE" or
"MICROSOFT.NETWORK/VIRTUALHUBS/WRITE" or
"MICROSOFT.NETWORK/VIRTUALROUTERS/WRITE" or
"MICROSOFT.NETWORK/VIRTUALROUTERS/DELETE") and event.outcome:(Success
or success)
    

    

    • 




















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