Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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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
Remove Immutable File Attribute
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Remove Immutable File Attribute
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: Remove Immutable File Attribute
id: 34979410-e4b5-4e5d-8cfb-389fdff05c12
related:
- id: a5b977d6-8a81-4475-91b9-49dbfcd941f7
type: derived
status: test
description: Detects usage of the 'chattr' utility to remove immutable file attribute.
references:
- https://www.trendmicro.com/en_us/research/22/i/how-malicious-actors-abuse-native-linux-tools-in-their-attacks.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-09-15
tags:
- attack.defense-evasion
- attack.t1222.002
logsource:
product: linux
category: process_creation
detection:
selection:
Image|endswith: '/chattr'
CommandLine|contains: ' -i '
condition: selection
falsepositives:
- Administrator interacting with immutable files (e.g. for instance backups).
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_chattr_immutable_removal.yml