App Granted Privileged Delegated Or App Permissions

Status: test
Severity: high
Log source: product azure, service auditlogs
Author: Bailey Bercik '@baileybercik', Mark Morowczynski '@markmorow'
Source: github.com/SigmaHQ/sigma

Detects when administrator grants either application permissions (app roles) or highly privileged delegated permissions

Known false positives

When the permission is legitimately needed for the app

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1098.003` Account Manipulation: Additional Cloud Roles
Privilege Escalation	`T1098.003` Account Manipulation: Additional Cloud Roles

Telemetry coverage

Platform	Record / event type
Azure	Add app role assignment to service principal

Rules detecting the same action

These rules filter on the same operation.

Rule body

title: App Granted Privileged Delegated Or App Permissions
id: 5aecf3d5-f8a0-48e7-99be-3a759df7358f
related:
    - id: ba2a7c80-027b-460f-92e2-57d113897dbc
      type: obsolete
status: test
description: Detects when administrator grants either application permissions (app roles) or highly privileged delegated permissions
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-applications#application-granted-highly-privileged-permissions
author: Bailey Bercik '@baileybercik', Mark Morowczynski '@markmorow'
date: 2022-07-28
modified: 2023-03-29
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1098.003
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        properties.message: Add app role assignment to service principal
    condition: selection
falsepositives:
    - When the permission is legitimately needed for the app
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    properties.message: Add app role assignment to service principal

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`properties.message`	eq	`Add app role assignment to service principal`	`field:"properties.message" kind:eq value:"Add app role assignment to service principal"`