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
Failed Logon From Public IP
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Failed Logon From Public IP
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: Failed Logon From Public IP
id: f88e112a-21aa-44bd-9b01-6ee2a2bbbed1
status: test
description: Detects a failed logon attempt from a public IP. A login from a public IP can indicate a misconfigured firewall or network boundary.
references:
- https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-4625
author: NVISO
date: 2020-05-06
modified: 2024-03-11
tags:
- attack.privilege-escalation
- attack.defense-evasion
- attack.initial-access
- attack.persistence
- attack.t1078
- attack.t1190
- attack.t1133
logsource:
product: windows
service: security
detection:
selection:
EventID: 4625
filter_main_ip_unknown:
IpAddress|contains: '-'
filter_main_local_ranges:
IpAddress|cidr:
- '::1/128' # IPv6 loopback
- '10.0.0.0/8'
- '127.0.0.0/8'
- '172.16.0.0/12'
- '192.168.0.0/16'
- '169.254.0.0/16'
- 'fc00::/7' # IPv6 private addresses
- 'fe80::/10' # IPv6 link-local addresses
condition: selection and not 1 of filter_main_*
falsepositives:
- Legitimate logon attempts over the internet
- IPv4-to-IPv6 mapped IPs
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/builtin/security/account_management/win_security_susp_failed_logon_source.yml