Suspicious FortiGate - New Administrator Account Created (via event)

title: Suspicious FortiGate - New Administrator Account Created (via event)
id: d5a1ff7c-29e0-5877-8d72-1a67c4c0c4b8
status: stable
description: This rule detects the creation of an administrator account on a Fortinet FortiGate Firewall.
references:
    - https://attack.mitre.org/techniques/T1136/001/
    - 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/390485493/config-system-admin
    - https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr
author: Huntrule Team
date: 2026-07-04
tags:
    - attack.persistence
    - attack.t1136.001
logsource:
    product: fortigate
    service: event
detection:
    selection:
        action: 'Add'
        cfgpath: 'system.admin'
    condition: selection
falsepositives:
    - Unknown
level: medium