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
Network Connection Initiated To Cloudflared Tunnels Domains
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Network Connection Initiated To Cloudflared Tunnels Domains
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: Network Connection Initiated To Cloudflared Tunnels Domains
id: 7cd1dcdc-6edf-4896-86dc-d1f19ad64903
related:
- id: a1d9eec5-33b2-4177-8d24-27fe754d0812
type: derived
status: test
description: |
Detects network connections to Cloudflared tunnels domains initiated by a process on the system.
Attackers can abuse that feature to establish a reverse shell or persistence on a machine.
references:
- https://defr0ggy.github.io/research/Abusing-Cloudflared-A-Proxy-Service-To-Host-Share-Applications/
- https://www.guidepointsecurity.com/blog/tunnel-vision-cloudflared-abused-in-the-wild/
- Internal Research
author: Kamran Saifullah, Nasreddine Bencherchali (Nextron Systems)
date: 2024-05-27
tags:
- attack.exfiltration
- attack.command-and-control
- attack.t1567
- attack.t1572
logsource:
category: network_connection
product: windows
detection:
selection:
Initiated: 'true'
DestinationHostname|endswith:
- '.v2.argotunnel.com'
- 'protocol-v2.argotunnel.com'
- 'trycloudflare.com'
- 'update.argotunnel.com'
condition: selection
falsepositives:
- Legitimate use of cloudflare tunnels will also trigger this.
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/network_connection/net_connection_win_domain_cloudflared_communication.yml