IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elastic Security Solution [7.16] ›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 being 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

Version: 1

Added (Elastic Stack release): 7.16.0

Rule authors: Austin Songer

Rule license: Elastic License v2

Potential false positives

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Virtual Network Device being modified or deleted 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 modified or deleted from 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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## Config

The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.

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

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