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
Bpfdoor TCP Ports Redirect
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Bpfdoor TCP Ports Redirect
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: Bpfdoor TCP Ports Redirect
id: 70b4156e-50fc-4523-aa50-c9dddf1993fc
status: test
description: |
All TCP traffic on particular port from attacker is routed to different port. ex. '/sbin/iptables -t nat -D PREROUTING -p tcp -s 192.168.1.1 --dport 22 -j REDIRECT --to-ports 42392'
The traffic looks like encrypted SSH communications going to TCP port 22, but in reality is being directed to the shell port once it hits the iptables rule for the attacker host only.
references:
- https://www.sandflysecurity.com/blog/bpfdoor-an-evasive-linux-backdoor-technical-analysis/
- https://www.elastic.co/security-labs/a-peek-behind-the-bpfdoor
author: Rafal Piasecki
date: 2022-08-10
tags:
- attack.defense-evasion
- attack.t1562.004
logsource:
product: linux
service: auditd
detection:
cmd:
type: 'EXECVE'
a0|endswith: 'iptables'
a1: '-t'
a2: 'nat'
keywords:
- '--to-ports 42'
- '--to-ports 43'
condition: cmd and keywords
falsepositives:
- Legitimate ports redirect
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/linux/auditd/execve/lnx_auditd_bpfdoor_port_redirect.yml