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 local pySigma backend, then reveal pipelines only when you actually need them.

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Indexed Rules

3,731

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Backends

Loaded from pysigma-node

pySigma Versions

Newest: 1.3.3

Translation Workspace

Shape the rule before it leaves Phoenix

Tune Translation

Active Rule

Webshell Remote Command Execution

pySigma version

Backend

Format

Target Profile

Splunk

Splunk through pysigma-backend-splunk.

Format Mode

Default

Default pySigma output mode for this backend.

Conversion Output

Webshell Remote Command Execution

Using Splunk · Default · pySigma 1.3.3

Translation controls

Adjust the rule on the left, then regenerate when you want a fresh backend-native query.

BackendSplunkFormatDefaultVersion1.3.3

title: Webshell Remote Command Execution
id: c0d3734d-330f-4a03-aae2-65dacc6a8222
status: test
description: Detects possible command execution by web application/web shell
references:
    - Personal Experience of the Author
    - https://www.vaadata.com/blog/what-is-command-injection-exploitations-and-security-best-practices/
author: Ilyas Ochkov, Beyu Denis, oscd.community
date: 2019-10-12
modified: 2025-12-05
tags:
    - attack.persistence
    - attack.t1505.003
logsource:
    product: linux
    service: auditd
    definition: |
        Required auditd configuration:
        -a always,exit -F arch=b32 -S execve -F euid=33 -k detect_execve_www
        -a always,exit -F arch=b64 -S execve -F euid=33 -k detect_execve_www
        -a always,exit -F arch=b32 -S execveat -F euid=33 -k detect_execve_www
        -a always,exit -F arch=b64 -S execveat -F euid=33 -k detect_execve_www
        Change the number "33" to the ID of your WebServer user. Default: www-data:x:33:33
detection:
    selection:
        type: 'SYSCALL'
        SYSCALL:
            - 'execve'
            - 'execveat'
        euid: 33
    condition: selection
falsepositives:
    - Admin activity
    - Crazy web applications
level: critical

CLI command

Copy the exact command to reproduce this translation locally.

sigma convert --without-pipeline -t splunk -f default rules/linux/auditd/syscall/lnx_auditd_web_rce.yml