{"id":"ad720b90-25ad-43ff-9b5e-5c841facc8e5","title":"User Added to Local Administrators Group","description":"Detects addition of users to the local administrator group via \"Net\" or \"Add-LocalGroupMember\".","author":"Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"medium","date":"2022-08-12","modified":"2023-03-02","tags":["attack.privilege-escalation","attack.persistence","attack.t1098"],"technique_ids":["T1098"],"logsource":{"category":"process_creation","product":"windows"},"falsepositives":["Administrative activity"],"references":["https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1"],"source_path":"rules/windows/process_creation/proc_creation_win_susp_add_user_local_admin_group.yml","source_sha256":"941afeea9e5d0c53b8178500668c761d4836964057e7dc763071babce3a95bd8","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_creation/proc_creation_win_susp_add_user_local_admin_group.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: User Added to Local Administrators Group\nid: ad720b90-25ad-43ff-9b5e-5c841facc8e5\nrelated:\n    - id: ffa28e60-bdb1-46e0-9f82-05f7a61cc06e # Remote Desktop groups\n      type: similar\n    - id: 10fb649c-3600-4d37-b1e6-56ea90bb7e09 # Privileged groups\n      type: similar\nstatus: test\ndescription: Detects addition of users to the local administrator group via \"Net\" or \"Add-LocalGroupMember\".\nreferences:\n    - https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1\nauthor: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems)\ndate: 2022-08-12\nmodified: 2023-03-02\ntags:\n    - attack.privilege-escalation\n    - attack.persistence\n    - attack.t1098\nlogsource:\n    category: process_creation\n    product: windows\ndetection:\n    selection_main:\n        - CommandLine|contains|all:\n              # net.exe\n              - 'localgroup '\n              - ' /add'\n        - CommandLine|contains|all:\n              # powershell.exe\n              - 'Add-LocalGroupMember '\n              - ' -Group '\n    selection_group:\n        CommandLine|contains:\n            - ' administrators '\n            - ' administrateur' # Typo without an 'S' so we catch both\n    condition: all of selection_*\nfalsepositives:\n    - Administrative activity\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1098","id":"T1098","name":"Account Manipulation","page":"techniques/enterprise/T1098/"}],"data_path":"data/detection-rules/ad720b90-25ad-43ff-9b5e-5c841facc8e5.json","kind":"sigma"}