Sigma rule: FortiGate - New VPN SSL Web Portal Added

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-85d3a372ae56, updated 2025-11-01T00:00:00.000Z.

Rule

Title
FortiGate - New VPN SSL Web Portal Added
Status
experimental
Level
medium
Author
Marco Pedrinazzi (@pedrinazziM) (InTheCyber)
Date
2025-11-01
File
rules/network/fortinet/fortigate/fortinet_fortigate_new_vpn_ssl_web_portal.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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.

Log source

product
fortigate
service
event

Detection

selection:
    action: 'Add'
    cfgpath: 'vpn.ssl.web.portal'
condition: selection

False positives (as the rule lists them)

  • A VPN SSL Web Portal can be added for legitimate purposes.

Tags

  • attack.persistence
  • attack.initial-access
  • attack.t1133

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/network/fortinet/fortigate/fortinet_fortigate_new_vpn_ssl_web_portal.yml

Sources and licences

  • SigmaHQ

    "FortiGate - New VPN SSL Web Portal Added" by Marco Pedrinazzi (@pedrinazziM) (InTheCyber) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/network/fortinet/fortigate/fortinet_fortigate_new_vpn_ssl_web_portal.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: FortiGate - New VPN SSL Web Portal Added",
entity page, dataset version ref-85d3a372ae56, updated 2025-11-01T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/2bfb6216-0c31-4d20-8501-2629b29a3fa2 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 2bfb6216-0c31-4d20-8501-2629b29a3fa2, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.