Detection rules › Sigma
Guest User Invited By Non Approved Inviters
Detects when a user that doesn't have permissions to invite a guest user attempts to invite one.
Known false positives
- A non malicious user is unaware of the proper process
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | |
| Persistence | |
| Privilege Escalation | |
| Stealth |
Telemetry coverage
| Platform | Record / event type |
|---|---|
| Azure | Invite external user |
Rules detecting the same action
These rules filter on the same operation.
- [Entra ID] Authentication Method Changed for Privileged Account (Kusto)
- Account Created and Deleted in Short Timeframe (Kusto)
- Account Created And Deleted Within A Close Time Frame (Sigma)
- Account created from non-approved sources (Kusto)
- Account created or deleted by non-approved user (Kusto)
- Addition of a Temporary Access Pass to a Privileged Account (Kusto)
- Authentication Method Changed for Privileged Account (Kusto)
- Authentication Methods Changed for Privileged Account (Kusto)
Rule body
title: Guest User Invited By Non Approved Inviters
id: 0b4b72e3-4c53-4d5b-b198-2c58cfef39a9
status: test
description: Detects when a user that doesn't have permissions to invite a guest user attempts to invite one.
references:
- https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts#things-to-monitor
author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
date: 2022-08-10
tags:
- attack.privilege-escalation
- attack.initial-access
- attack.persistence
- attack.stealth
- attack.t1078.004
logsource:
product: azure
service: auditlogs
detection:
selection:
properties.message: Invite external user
Status: failure
condition: selection
falsepositives:
- A non malicious user is unaware of the proper process
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
properties.message: Invite external user
Status: failure
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Status | eq |
| field:"Status" kind:eq value:"failure" |
properties.message | eq |
| field:"properties.message" kind:eq value:"Invite external user" |