Suspicious Powershell Timestomp (via ps_script)

title: Suspicious Powershell Timestomp (via ps_script)
id: 7218026b-bc99-5c43-a7f6-cd5fea705640
status: stable
description: This rule detects threat actors may modify file time attributes to hide new or changes to existing files. Timestomping is a method that modifies the timestamps of a file (the modify, access, create, and change times), frequently to mimic files that are in the same folder.
references:
    - https://attack.mitre.org/techniques/T1070/006/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.006/T1070.006.md
    - https://www.offensive-security.com/metasploit-unleashed/timestomp/
author: Huntrule Team
date: 2026-01-04
tags:
    - attack.stealth
    - attack.t1070.006
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection_ioc:
        ScriptBlockText|contains:
            - '.CreationTime ='
            - '.LastWriteTime ='
            - '.LastAccessTime ='
            - '[IO.File]::SetCreationTime'
            - '[IO.File]::SetLastAccessTime'
            - '[IO.File]::SetLastWriteTime'
    condition: selection_ioc
falsepositives:
    - Unknown
level: medium