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
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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
Potential KDC RC4-HMAC Downgrade Exploit - CVE-2022-37966
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential KDC RC4-HMAC Downgrade Exploit - CVE-2022-37966
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: Potential KDC RC4-HMAC Downgrade Exploit - CVE-2022-37966
id: e6f81941-b1cd-4766-87db-9fc156f658ee
status: test
description: Detects the exploitation of a security bypass and elevation of privilege vulnerability with Authentication Negotiation by using weak RC4-HMAC negotiation
references:
- https://support.microsoft.com/en-us/topic/kb5021131-how-to-manage-the-kerberos-protocol-changes-related-to-cve-2022-37966-fd837ac3-cdec-4e76-a6ec-86e67501407d
author: Florian Roth (Nextron Systems)
date: 2022-11-09
modified: 2025-11-03
tags:
- attack.privilege-escalation
- detection.emerging-threats
- cve.2022-37966
logsource:
product: windows
service: system
detection:
selection:
EventID: 42
Provider_Name:
- 'Kerberos-Key-Distribution-Center'
- 'Microsoft-Windows-Kerberos-Key-Distribution-Center'
Level: 2 # Error
condition: selection
falsepositives:
- Unknown
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2022/Exploits/CVE-2022-37966/win_system_exploit_cve_2022_37966_kdcsvc_rc4_downgrade.yml