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
Modifying Crontab
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Modifying Crontab
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: Modifying Crontab
id: af202fd3-7bff-4212-a25a-fb34606cfcbe
status: test
description: Detects suspicious modification of crontab file.
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1053.003/T1053.003.md
author: Pawel Mazur
date: 2022-04-16
tags:
- attack.privilege-escalation
- attack.execution
- attack.persistence
- attack.t1053.003
logsource:
product: linux
service: cron
detection:
keywords:
- 'REPLACE'
condition: keywords
falsepositives:
- Legitimate modification of crontab
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/linux/builtin/cron/lnx_cron_crontab_file_modification.yml