detection.wiki

Detection rules › Sigma

Azure Application Gateway Modified or Deleted

Status
test
Severity
medium
Log source
product azure, service activitylogs
Author
Austin Songer
Source
github.com/SigmaHQ/sigma

Identifies when a application gateway is modified or deleted.

Known false positives

  • Application gateway 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.
  • Application gateway modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

MITRE ATT&CK coverage

TacticTechniques
ImpactNo specific technique

Telemetry coverage

PlatformRecord / event type
AzureActivity Log event Microsoft.Network/applicationGateways/delete: Deletes an application gateway
AzureActivity Log event Microsoft.Network/applicationGateways/write: Creates an application gateway or updates an application gateway

Rule body

title: Azure Application Gateway Modified or Deleted
id: ad87d14e-7599-4633-ba81-aeb60cfe8cd6
status: test
description: Identifies when a application gateway is modified or deleted.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
author: Austin Songer
date: 2021-08-16
modified: 2022-08-23
tags:
    - attack.impact
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName:
            - MICROSOFT.NETWORK/APPLICATIONGATEWAYS/WRITE
            - MICROSOFT.NETWORK/APPLICATIONGATEWAYS/DELETE
    condition: selection
falsepositives:
    - Application gateway 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.
    - Application gateway 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

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    operationName:
        - MICROSOFT.NETWORK/APPLICATIONGATEWAYS/WRITE
        - MICROSOFT.NETWORK/APPLICATIONGATEWAYS/DELETE

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
operationNameeq
  • MICROSOFT.NETWORK/APPLICATIONGATEWAYS/DELETE
  • MICROSOFT.NETWORK/APPLICATIONGATEWAYS/WRITE
field:"operationName" kind:eq