36 lines
1.1 KiB
YAML
36 lines
1.1 KiB
YAML
|
|
title: Powershell Timestomp
|
|
ruletype: Sigma
|
|
author: frack113
|
|
date: 2021/08/03
|
|
description: Adversaries may modify file time attributes to hide new or changes to
|
|
existing files. Timestomping is a technique that modifies the timestamps of a file
|
|
(the modify, access, create, and change times), often to mimic files that are in
|
|
the same folder.
|
|
detection:
|
|
SELECTION_1:
|
|
ScriptBlockText:
|
|
- '*.CreationTime =*'
|
|
- '*.LastWriteTime =*'
|
|
- '*.LastAccessTime =*'
|
|
- '*[IO.File]::SetCreationTime*'
|
|
- '*[IO.File]::SetLastAccessTime*'
|
|
- '*[IO.File]::SetLastWriteTime*'
|
|
condition: SELECTION_1
|
|
falsepositives:
|
|
- legitime admin script
|
|
id: c6438007-e081-42ce-9483-b067fbef33c3
|
|
level: medium
|
|
logsource:
|
|
category: ps_script
|
|
definition: EnableScriptBlockLogging must be set to enable
|
|
product: windows
|
|
modified: 2021/10/16
|
|
references:
|
|
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1070.006/T1070.006.md
|
|
- https://www.offensive-security.com/metasploit-unleashed/timestomp/
|
|
status: experimental
|
|
tags:
|
|
- attack.defense_evasion
|
|
- attack.t1070.006
|