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
Katz Stealer Suspicious User-Agent
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Katz Stealer Suspicious User-Agent
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: Katz Stealer Suspicious User-Agent
id: 834c6d2f-5e98-4b2a-b453-0c4f234afedd
status: experimental
description: |
Detects network connections with a suspicious user-agent string containing "katz-ontop", which may indicate Katz Stealer activity.
references:
- Internal Research
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-05-22
tags:
- attack.command-and-control
- attack.t1071.001
- detection.emerging-threats
logsource:
product: zeek
service: http
detection:
selection:
user_agent|contains: 'katz-ontop'
condition: selection
falsepositives:
- Unlikely
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2025/Malware/Katz-Stealer/zeek_http_katz_stealer_susp_useragent.yml