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MediumSplunk security contentRod Soto +1

O365 Add App Role Assignment Grant User

The following analytic detects the addition of an application role assignment grant to a user in Office 365. It leverages data from the `o365_management_activity` dataset, specifically monitoring the "Add app role…

Description

The following analytic detects the addition of an application role assignment grant to a user in Office 365. It leverages data from the `o365_management_activity` dataset, specifically monitoring the "Add app role assignment grant to user" operation. This activity is significant as it can indicate unauthorized privilege escalation or the assignment of sensitive roles to users. If confirmed malicious, this could allow an attacker to gain elevated permissions, potentially leading to unauthorized access to critical resources and data within the Office 365 environment.

Detection logic

Detection requirements

Platform
IaaSIdentity ProviderOffice SuiteSaaS

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
o365_add_app_role_assignment_grant_to_user

Known benign triggers

  • The creation of a new Federation is not necessarily malicious, however this events need to be followed closely, as it may indicate federated credential abuse or backdoor via federated identities at a different cloud provider.

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