Azure Application Gateway Modified or Deleted via Activity Logs
Alerts on Azure Activity Log operations that modify or delete Application Gateway resources.
FreeReviewedSigma · Medium · v5
- Product
- azure
- Service
- activitylogs
- Author
- Austin Songer (SigmaHQ), DRL 1.1
- Published
- 2021-08-16
- Updated
- 2026-07-31
What it detects
This rule flags Azure Activity Log events where an Application Gateway is modified or deleted. Such changes can indicate malicious intent to disrupt traffic, alter configurations, or remove the gateway entirely. Detection relies on Activity Logs operation names for Application Gateway write and delete actions. Investigations should focus on the initiating identity and context around the change.
Reporting behind it
Changelog
v5- v5Candidate ingested via manual entry.2026-07-31
- v4Candidate ingested via manual entry.2026-07-31
- v3Candidate ingested via manual entry.2026-07-31
- v2Candidate ingested via manual entry.2026-07-31
- v1No changelog recorded for this version.2026-07-30
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
azure-application-gateway-modified-or-deleted-via-activity-logs-ad87d14e
title: Azure Application Gateway Modified or Deleted via Activity Logs
id: bd65ae05-3bf4-4be7-8046-84cf8b25b08f
status: test
description: This rule flags Azure Activity Log events where an Application Gateway is modified or deleted. Such changes can indicate malicious intent to disrupt traffic, alter configurations, or remove the gateway entirely. Detection relies on Activity Logs operation names for Application Gateway write and delete actions. Investigations should focus on the initiating identity and context around the change.
references:
- https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
- https://github.com/SigmaHQ/sigma/blob/master/rules/cloud/azure/activity_logs/azure_application_gateway_modified_or_deleted.yml
author: Austin Songer, Huntrule Team
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
license: DRL-1.1
related:
- id: ad87d14e-7599-4633-ba81-aeb60cfe8cd6
type: derived