Azure Virtual Network Device Modified or Deletededit

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 positivesedit

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 guideedit


Rule queryedit

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 mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

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)