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
User Has Been Deleted Via Userdel
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
User Has Been Deleted Via Userdel
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: User Has Been Deleted Via Userdel
id: 08f26069-6f80-474b-8d1f-d971c6fedea0
status: test
description: Detects execution of the "userdel" binary. Which is used to delete a user account and related files. This is sometimes abused by threat actors in order to cover their tracks
references:
- https://linuxize.com/post/how-to-delete-group-in-linux/
- https://www.cyberciti.biz/faq/linux-remove-user-command/
- https://www.cybrary.it/blog/0p3n/linux-commands-used-attackers/
- https://linux.die.net/man/8/userdel
author: Tuan Le (NCSGroup)
date: 2022-12-26
tags:
- attack.impact
- attack.t1531
logsource:
product: linux
category: process_creation
detection:
selection:
Image|endswith: '/userdel'
condition: selection
falsepositives:
- Legitimate administrator activities
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/linux/process_creation/proc_creation_lnx_userdel.yml