Sigma rule: Guest User Invited By Non Approved Inviters

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-d4591a6e0a6d, updated 2022-08-10T00:00:00.000Z.

Rule

Title
Guest User Invited By Non Approved Inviters
Status
test
Level
medium
Author
Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H'
Date
2022-08-10
File
rules/cloud/azure/audit_logs/azure_guest_invite_failure.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when a user that doesn't have permissions to invite a guest user attempts to invite one.

Log source

product
azure
service
auditlogs

Detection

selection:
    properties.message: Invite external user
    Status: failure
condition: selection

False positives (as the rule lists them)

  • A non malicious user is unaware of the proper process

Tags

  • attack.privilege-escalation
  • attack.initial-access
  • attack.persistence
  • attack.stealth
  • attack.t1078.004

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/audit_logs/azure_guest_invite_failure.yml

Sources and licences

  • SigmaHQ

    "Guest User Invited By Non Approved Inviters" by Mark Morowczynski '@markmorow', Yochana Henderson, '@Yochana-H' (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/audit_logs/azure_guest_invite_failure.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Guest User Invited By Non Approved Inviters",
entity page, dataset version ref-d4591a6e0a6d, updated 2022-08-10T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0b4b72e3-4c53-4d5b-b198-2c58cfef39a9 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0b4b72e3-4c53-4d5b-b198-2c58cfef39a9, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.