
title: Suspicious XOR Encoded PowerShell Command Line
author: Sami Ruohonen, Harish Segar (improvement)
date: 2018/09/05
description: Detects suspicious powershell process which includes bxor command, alternative
  obfuscation method to b64 encoded commands.
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    Description: Windows PowerShell
  SELECTION_3:
    Product: PowerShell Core 6
  SELECTION_4:
    CommandLine:
    - '*bxor*'
    - '*join*'
    - '*char*'
  condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3) and SELECTION_4)
falsepositives:
- unknown
id: bb780e0c-16cf-4383-8383-1e5471db6cf9
level: medium
logsource:
  category: process_creation
  product: windows
modified: 2020/09/06
status: experimental
tags:
- attack.defense_evasion
- attack.t1086
- attack.t1059.001
- attack.t1140
- attack.t1027
ruletype: SIGMA
