Sigma rule: User Added to Local Administrators Group

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-976d35893874, updated 2023-03-02T00:00:00.000Z.

Rule

Title
User Added to Local Administrators Group
Status
test
Level
medium
Author
Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)
Date
2022-08-12
Modified
2023-03-02
File
rules/windows/process_creation/proc_creation_win_susp_add_user_local_admin_group.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects addition of users to the local administrator group via "Net" or "Add-LocalGroupMember".

Log source

product
windows
category
process_creation

Detection

selection_main:
    - CommandLine|contains|all:
          # net.exe
          - 'localgroup '
          - ' /add'
    - CommandLine|contains|all:
          # powershell.exe
          - 'Add-LocalGroupMember '
          - ' -Group '
selection_group:
    CommandLine|contains:
        - ' administrators '
        - ' administrateur' # Typo without an 'S' so we catch both
condition: all of selection_*

False positives (as the rule lists them)

  • Administrative activity

Tags

  • attack.privilege-escalation
  • attack.persistence
  • attack.t1098

MITRE ATT&CK ids this rule names

Related rules

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/windows/process_creation/proc_creation_win_susp_add_user_local_admin_group.yml

Sources and licences

  • SigmaHQ

    "User Added to Local Administrators Group" by Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_susp_add_user_local_admin_group.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: User Added to Local Administrators Group",
entity page, dataset version ref-976d35893874, updated 2023-03-02T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/ad720b90-25ad-43ff-9b5e-5c841facc8e5 (accessed 2026-11-03).
Underlying source: SigmaHQ rule ad720b90-25ad-43ff-9b5e-5c841facc8e5, 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.