Suspicious FortiGate - New VPN SSL Web Portal Added (via event)

title: Suspicious FortiGate - New VPN SSL Web Portal Added (via event)
id: ddb46d12-1812-55a6-b500-d34ba7eee7cd
status: stable
description: This rule detects the addition of a VPN SSL Web Portal on a Fortinet FortiGate Firewall. This behavior was observed in pair with modification of VPN SSL settings.
references:
    - https://attack.mitre.org/techniques/T1133/
    - 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/113121765/config-vpn-ssl-web-portal
    - https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr
author: Huntrule Team
date: 2026-06-24
tags:
    - attack.persistence
    - attack.initial-access
    - attack.t1133
logsource:
    product: fortigate
    service: event
detection:
    selection:
        action: 'Add'
        cfgpath: 'vpn.ssl.web.portal'
    condition: selection
falsepositives:
    - Unknown
level: medium