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
Persistence Via Cron Files
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Persistence Via Cron Files
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: Persistence Via Cron Files
id: 6c4e2f43-d94d-4ead-b64d-97e53fa2bd05
status: test
description: Detects creation of cron file or files in Cron directories which could indicates potential persistence.
references:
- https://github.com/microsoft/MSTIC-Sysmon/blob/f1477c0512b0747c1455283069c21faec758e29d/linux/configs/attack-based/persistence/T1053.003_Cron_Activity.xml
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), MSTIC
date: 2021-10-15
modified: 2022-12-31
tags:
- attack.privilege-escalation
- attack.execution
- attack.persistence
- attack.t1053.003
logsource:
product: linux
category: file_event
detection:
selection1:
TargetFilename|startswith:
- '/etc/cron.d/'
- '/etc/cron.daily/'
- '/etc/cron.hourly/'
- '/etc/cron.monthly/'
- '/etc/cron.weekly/'
- '/var/spool/cron/crontabs/'
selection2:
TargetFilename|contains:
- '/etc/cron.allow'
- '/etc/cron.deny'
- '/etc/crontab'
condition: 1 of selection*
falsepositives:
- Any legitimate cron file.
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/linux/file_event/file_event_lnx_persistence_cron_files.yml