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FortiGate - Firewall Address Object Added — Sigma Rule

Sigma rule 5c8d7b41-3812-432f-a0bb-4cfb7c31827e. FortiGate - Firewall Address Object Added — Sigma Rule. Detects the addition of firewall address objects on a Fortinet FortiGate Firewall.

Rule metadata and linked tags

experimentalmediumfortigateeventattack.defense-impairmentattack.t1685

Author: Marco Pedrinazzi @pedrinazziM (InTheCyber). Source status: experimental; severity: medium. Source dates: 2025-11-01 / not supplied.

{
  "product": "fortigate",
  "service": "event"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 9376ecc403ced3da261401e38b88f2cdab7805995013e19a89f05223414614d1

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: FortiGate - Firewall Address Object Added
id: 5c8d7b41-3812-432f-a0bb-4cfb7c31827e
status: experimental
description: Detects the addition of firewall address objects on a Fortinet FortiGate Firewall.
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/306021697/config-firewall-address
    - https://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr
author: Marco Pedrinazzi @pedrinazziM (InTheCyber)
date: 2025-11-01
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: fortigate
    service: event
detection:
    selection:
        action: 'Add'
        cfgpath: 'firewall.address'
    condition: selection
falsepositives:
    - An address could be added or deleted for legitimate purposes.
level: medium

Original YAML and metadata in JSON

False positives

  • An address could be added or deleted for legitimate purposes.

Source references

Connected ecosystem references

Exact source-tagged techniques

Telemetry review

Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.

Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.