Suspicious FortiGate - User Group Modified (via event)

title: Suspicious FortiGate - User Group Modified (via event)
id: 794d7098-f24f-5ebb-8ae2-f25154b544d1
status: stable
description: This rule detects the modification of a user group on a Fortinet FortiGate Firewall. The group could be used to grant VPN access to a network.
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/328136827/config-user-group
    - https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr
author: Huntrule Team
date: 2026-06-15
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1098
logsource:
    product: fortigate
    service: event
detection:
    selection:
        action: 'Edit'
        cfgpath: 'user.group'
    condition: selection
falsepositives:
    - Unknown
level: medium