Guest User Invited By Non Approved Inviters

calendar Oct 23, 2025 · attack.privilege-escalation attack.initial-access attack.persistence attack.defense-evasion attack.t1078.004  ·
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Detects when a user that doesn't have permissions to invite a guest user attempts to invite one.

Sigma rule (View on GitHub)

 1title: Guest User Invited By Non Approved Inviters
 2id: 0b4b72e3-4c53-4d5b-b198-2c58cfef39a9
 3status: test
 4description: Detects when a user that doesn't have permissions to invite a guest user attempts to invite one.
 5references:
 6    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-privileged-accounts#things-to-monitor
 7author: Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
 8date: 2022-08-10
 9tags:
10    - attack.privilege-escalation
11    - attack.initial-access
12    - attack.persistence
13    - attack.defense-evasion
14    - attack.t1078.004
15logsource:
16    product: azure
17    service: auditlogs
18detection:
19    selection:
20        properties.message: Invite external user
21        Status: failure
22    condition: selection
23falsepositives:
24    - A non malicious user is unaware of the proper process
25level: medium

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