Remove Immutable File Attribute

Title: Remove Immutable File Attribute
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
modified:None
Tags:

• -'attack.defense-impairment'
• -'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