Azure DNS Zone Modified or Deleted

Description

Identifies when DNS zone is modified or deleted.

Query · sigma

selection:
  operationName|startswith: MICROSOFT.NETWORK/DNSZONES
  operationName|endswith:
  - /WRITE
  - /DELETE
condition: selection

Known false positives

  • DNS zone modified and 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.
  • DNS zone modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Raw source Azure DNS Zone Modified or Deleted · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Azure DNS Zone Modified or Deleted
id: af6925b0-8826-47f1-9324-337507a0babd
status: test
description: Identifies when DNS zone is modified or deleted.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes
author: Austin Songer @austinsonger
date: 2021-08-08
modified: 2022-08-23
tags:
    - attack.impact
    - attack.t1565.001
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName|startswith: 'MICROSOFT.NETWORK/DNSZONES'
        operationName|endswith:
            - '/WRITE'
            - '/DELETE'
    condition: selection
falsepositives:
    - DNS zone modified and 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.
    - DNS zone modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
level: medium

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