Azure service principal assigned app role

Synopsis

Field	Value
Activation Period	14 Days
Training Period	30 Days
Test Period	N/A (single event)
Deduplication Period	1 Day
Required Data	AzureAD Audit Log
Detection Modules	Identity Threat Module, SaaS Threat Detection
ATT&CK Tactic	Privilege Escalation (TA0004)
ATT&CK Technique	Valid Accounts (T1078)
Severity	Informational

Description

An identity assigned an app role (permissions) to a service principal.

Attacker's Goals

• An attacker may add roles to service principals that will allow them to access sensitive information and perform other actions.

Investigative actions

• Check if the added service principle is new to the organization.
• Check whether the account that added the app role is supposed to perform such actions.
• Check for possible logins and actions from the service principle with the role.
• Follow further actions done by the application and the assigner.