SigmaHQ/rules/linux/macos_change_file_time_attr.yml

title: 'File Time Attribute Change'
id: 88c0f9d8-30a8-4120-bb6b-ebb54abcf2a0
status: experimental
description: 'Detect file time attribute change to hide new or changes to existing files.'
    # For this rule to work you must enable audit of process execution in OpenBSM, see
    # https://osquery.readthedocs.io/en/stable/deployment/process-auditing/#macos-process-socket-auditing
author: 'Igor Fits, Mikhail Larin, oscd.community'
date: 2020/10/19
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070.006/T1070.006.md
logsource:
    product: macos
    category: process_creation
detection:
    selection1:
        Image|endswith: '/touch'
    selection2:
        CommandLine|contains:
         - '-t'
         - '-acmr'
         - '-d'
         - '-r'
    condition: selection1 and selection2
falsepositives:
    - 'Unknown'
level: medium
tags:
    - attack.defense_evasion
    - attack.t1070.006