Sigma rule: New Root Certificate Authority Added

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-f536f0412dea, updated 2024-03-26T00:00:00.000Z.

Rule

Title
New Root Certificate Authority Added
Status
test
Level
medium
Author
Harjot Shah Singh, '@cyb3rjy0t'
Date
2024-03-26
File
rules/cloud/azure/audit_logs/azure_ad_new_root_ca_added.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects newly added root certificate authority to an AzureAD tenant to support certificate based authentication.

Log source

product
azure
service
auditlogs

Detection

selection:
    OperationName: 'Set Company Information'
    TargetResources.modifiedProperties.newValue|contains: 'TrustedCAsForPasswordlessAuth'
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.credential-access
  • attack.persistence
  • attack.privilege-escalation
  • attack.defense-impairment
  • attack.t1556

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_ad_new_root_ca_added.yml

Sources and licences

  • SigmaHQ

    "New Root Certificate Authority Added" by Harjot Shah Singh, '@cyb3rjy0t' (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/audit_logs/azure_ad_new_root_ca_added.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: New Root Certificate Authority Added",
entity page, dataset version ref-f536f0412dea, updated 2024-03-26T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4bb80281-3756-4ec8-a88e-523c5a6fda9e (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4bb80281-3756-4ec8-a88e-523c5a6fda9e, 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.