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
Audio Capture
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Audio Capture
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: Audio Capture
id: a7af2487-9c2f-42e4-9bb9-ff961f0561d5
status: test
description: Detects attempts to record audio using the arecord and ecasound utilities.
references:
- https://linux.die.net/man/1/arecord
- https://linuxconfig.org/how-to-test-microphone-with-audio-linux-sound-architecture-alsa
- https://manpages.debian.org/unstable/ecasound/ecasound.1.en.html
- https://ecasound.seul.org/ecasound/Documentation/examples.html#fconversions
author: Pawel Mazur, Milad Cheraghi
date: 2021-09-04
modified: 2025-12-05
tags:
- attack.collection
- attack.t1123
logsource:
product: linux
service: auditd
detection:
selection_execve:
type: EXECVE
a0: arecord
a1: '-vv'
a2: '-fdat'
selection_syscall_memfd_create:
type: SYSCALL
exe|endswith: "/ecasound"
SYSCALL: 'memfd_create'
condition: 1 of selection_*
falsepositives:
- Unknown
level: low
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/linux/auditd/lnx_auditd_audio_capture.yml