{"id":"ddbbe845-1d74-43a8-8231-2156d180234d","title":"FortiGate - New Local User Created","description":"Detects the creation of a new local user on a Fortinet FortiGate Firewall.\nThe new local user could be used for VPN connections.\n","author":"Marco Pedrinazzi @pedrinazziM (InTheCyber)","status":"experimental","level":"medium","date":"2025-11-01","modified":"","tags":["attack.persistence","attack.t1136.001"],"technique_ids":["T1136.001"],"logsource":{"product":"fortigate","service":"event"},"falsepositives":["A local user can be created for legitimate purposes. Investigate the user details to determine if it is authorized."],"references":["https://www.fortiguard.com/psirt/FG-IR-24-535","https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/398/event","https://docs.fortinet.com/document/fortigate/7.6.4/cli-reference/109120963/config-user-local","https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr"],"source_path":"rules/network/fortinet/fortigate/fortinet_fortigate_new_local_user_created.yml","source_sha256":"e4af3e66b590041d027944daa344ad50e5aff0500c9217117e4893a8e8e766b8","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/network/fortinet/fortigate/fortinet_fortigate_new_local_user_created.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: FortiGate - New Local User Created\nid: ddbbe845-1d74-43a8-8231-2156d180234d\nstatus: experimental\ndescription: |\n    Detects the creation of a new local user on a Fortinet FortiGate Firewall.\n    The new local user could be used for VPN connections.\nreferences:\n    - https://www.fortiguard.com/psirt/FG-IR-24-535\n    - https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/398/event\n    - https://docs.fortinet.com/document/fortigate/7.6.4/cli-reference/109120963/config-user-local\n    - https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr\nauthor: Marco Pedrinazzi @pedrinazziM (InTheCyber)\ndate: 2025-11-01\ntags:\n    - attack.persistence\n    - attack.t1136.001\nlogsource:\n    product: fortigate\n    service: event\ndetection:\n    selection:\n        action: 'Add'\n        cfgpath: 'user.local'\n    condition: selection\nfalsepositives:\n    - A local user can be created for legitimate purposes. Investigate the user details to determine if it is authorized.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1136.001","id":"T1136.001","name":"Local Account","page":"techniques/enterprise/T1136.001/"}],"data_path":"data/detection-rules/ddbbe845-1d74-43a8-8231-2156d180234d.json","kind":"sigma"}