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blue-team-tools/rules/cloud/azure/azure_app_credential_modification.yml
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YAML

title: Azure Application Credential Modified
id: cdeef967-f9a1-4375-90ee-6978c5f23974
description: Identifies when a application credential is modified.
author: Austin Songer @austinsonger
status: experimental
date: 2021/09/02
references:
- https://www.cloud-architekt.net/auditing-of-msi-and-service-principals/
logsource:
product: azure
service: activitylogs
detection:
selection:
properties.message: 'Update application - Certificates and secrets management'
condition: selection
level: medium
tags:
- attack.impact
falsepositives:
- Application credential added 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 credential added from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.