FortiGate Firewall Address Object Added (event action Add)
Alerts when a FortiGate firewall address object is added via configuration change events.
- Product
- fortigate
- Service
- event
- Author
- Marco Pedrinazzi (@pedrinazziM) (InTheCyber) (SigmaHQ), DRL 1.1
- Published
- 2025-11-01
- Updated
- 2026-07-31
ATT&CK techniques
Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule flags events on FortiGate where a firewall address object is added, based on an action of "Add" with configuration path "firewall.address." Attackers and administrators can use new address objects to change network targeting for subsequent firewall policy updates, so detecting object creation helps identify configuration manipulation. It relies on FortiGate event telemetry that includes the event action and the affected configuration path.
Reporting behind it
- fortiguard.comhttps://www.fortiguard.com/psirt/FG-IR-24-535
- docs.fortinet.comhttps://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/398/event
- docs.fortinet.comhttps://docs.fortinet.com/document/fortigate/7.6.4/cli-reference/306021697/config-firewall-address
- docs.fortinet.comhttps://docs.fortinet.com/document/fortigate/7.6.4/fortios-log-message-reference/44547/44547-logid-event-config-objattr
- github.comhttps://github.com/SigmaHQ/sigma/blob/master/rules/network/fortinet/fortigate/fortinet_fortigate_new_firewall_address_object.yml
Changelog
v2- v2Candidate ingested via manual entry.2026-07-31
- v1No changelog recorded for this version.2026-07-30
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
title: FortiGate Firewall Address Object Added (event action Add)
id: a6ae3b49-54ff-4a3d-be7e-d83243df20b0
status: experimental
description: This rule flags events on FortiGate where a firewall address object is added, based on an action of "Add" with configuration path "firewall.address." Attackers and administrators can use new address objects to change network targeting for subsequent firewall policy updates, so detecting object creation helps identify configuration manipulation. It relies on FortiGate event telemetry that includes the event action and the affected configuration path.
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
- https://github.com/SigmaHQ/sigma/blob/master/rules/network/fortinet/fortigate/fortinet_fortigate_new_firewall_address_object.yml
author: Marco Pedrinazzi (@pedrinazziM) (InTheCyber), Huntrule Team
date: 2025-11-01
modified: 2026-05-04
tags:
- attack.defense-impairment
- attack.t1686.002
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
license: DRL-1.1
related:
- id: 5c8d7b41-3812-432f-a0bb-4cfb7c31827e
type: derived