Sigma rule: Guest Users Invited To Tenant By Non Approved Inviters

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-909359252423, updated 2026-05-09T00:00:00.000Z.

Rule

Title
Guest Users Invited To Tenant By Non Approved Inviters
Status
test
Level
medium
Author
MikeDuddington, '@dudders1'
Date
2022-07-28
Modified
2026-05-09
File
rules-placeholder/cloud/azure/audit_logs/azure_ad_guest_users_invited_to_tenant_by_non_approved_inviters.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects guest users being invited to tenant by non-approved inviters

Log source

product
azure
service
auditlogs

Detection

selection:
    category: 'UserManagement'
    operationName: 'Invite external user'
filter_main_unapproved_inviters:
    properties.initiatedBy|contains|expand: '%Approved_Inviters%'
condition: selection and not 1 of filter_main_*

False positives (as the rule lists them)

  • Unlikely

Tags

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

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-placeholder/cloud/azure/audit_logs/azure_ad_guest_users_invited_to_tenant_by_non_approved_inviters.yml

Sources and licences

  • SigmaHQ

    "Guest Users Invited To Tenant By Non Approved Inviters" by MikeDuddington, '@dudders1' (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-placeholder/cloud/azure/audit_logs/azure_ad_guest_users_invited_to_tenant_by_non_approved_inviters.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 Users Invited To Tenant By Non Approved Inviters",
entity page, dataset version ref-909359252423, updated 2026-05-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4ad97bf5-a514-41a4-abd3-4f3455ad4865 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4ad97bf5-a514-41a4-abd3-4f3455ad4865, 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.