rules/windows/process_creation/win_susp_powershell_encoded_param.yml

title: PowerShell Encoded Character Syntax
id: e312efd0-35a1-407f-8439-b8d434b438a6
status: test
description: Detects suspicious encoded character syntax often used for defense evasion
author: Florian Roth
references:
  - https://twitter.com/0gtweet/status/1281103918693482496
date: 2020/07/09
modified: 2021/11/27
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    CommandLine|contains: '(WCHAR)0x'
  condition: selection
falsepositives:
  - Unknown
level: high
tags:
  - attack.execution
  - attack.t1059.001
  - attack.t1086        # an old one
  - attack.defense_evasion
  - attack.t1027
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`title: PowerShell Encoded Character Syntax`
			`id: e312efd0-35a1-407f-8439-b8d434b438a6`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`status: test`
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`description: Detects suspicious encoded character syntax often used for defense evasion`
			`author: Florian Roth`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`references:`
			`- https://twitter.com/0gtweet/status/1281103918693482496`
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`date: 2020/07/09`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`modified: 2021/11/27`
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`logsource:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`category: process_creation`
			`product: windows`
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`detection:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`selection:`
			`CommandLine\|contains: '(WCHAR)0x'`
			`condition: selection`
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`falsepositives:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`- Unknown`
rule: PowerShell encoded character syntax 2020-07-09 08:52:32 +02:00			`level: high`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`tags:`
			`- attack.execution`
			`- attack.t1059.001`
			`- attack.t1086 # an old one`
			`- attack.defense_evasion`
			`- attack.t1027`