Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
This studio is built around Phoenix's own rule corpus, not a blank editor. Search by title or rule id, choose a live sigma-cli backend, then reveal pipelines only when you actually need them.
Indexed Rules
3,707
Ready to search
Backends
17
Live from sigconverter.io
CLI Versions
10
Newest: 2.0.2
Translation Workspace
Shape the rule before it leaves Phoenix
Tune Translation
Active Rule
FortiGate - User Group Modified
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
FortiGate - User Group Modified
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: FortiGate - User Group Modified
id: 69ffc84e-8b1a-4024-8351-e018f66b8275
status: experimental
description: |
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: Marco Pedrinazzi @pedrinazziM (InTheCyber)
date: 2025-11-01
tags:
- attack.persistence
- attack.privilege-escalation
# - attack.t1098.007
logsource:
product: fortigate
service: event
detection:
selection:
action: 'Edit'
cfgpath: 'user.group'
condition: selection
falsepositives:
- A group can be modified for legitimate purposes.
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/network/fortinet/fortigate/fortinet_fortigate_user_group_modified.yml