Azure Virtual Network Device Modified or Deleted

title: Azure Virtual Network Device Modified or Deleted
id: 15ef3fac-f0f0-4dc4-ada0-660aa72980b3
status: test
description: |
    Identifies when a virtual network device is being modified or deleted.
    This can be a network interface, network virtual appliance, virtual hub, or virtual router.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
author: Austin Songer @austinsonger
date: 2021-08-08
modified: 2022-08-23
tags:
    - attack.impact
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName:
            - MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/WRITE
            - MICROSOFT.NETWORK/NETWORKINTERFACES/TAPCONFIGURATIONS/DELETE
            - MICROSOFT.NETWORK/NETWORKINTERFACES/WRITE
            - MICROSOFT.NETWORK/NETWORKINTERFACES/JOIN/ACTION
            - MICROSOFT.NETWORK/NETWORKINTERFACES/DELETE
            - MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/DELETE
            - MICROSOFT.NETWORK/NETWORKVIRTUALAPPLIANCES/WRITE
            - MICROSOFT.NETWORK/VIRTUALHUBS/DELETE
            - MICROSOFT.NETWORK/VIRTUALHUBS/WRITE
            - MICROSOFT.NETWORK/VIRTUALROUTERS/WRITE
            - MICROSOFT.NETWORK/VIRTUALROUTERS/DELETE
    condition: selection
falsepositives:
    - 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.
level: medium