frack113
28 lines
741 B
YAML
28 lines
741 B
YAML
title: Suspicious XOR Encoded PowerShell Command Line
|
|
id: 812837bb-b17f-45e9-8bd0-0ec35d2e3bd6
|
|
description: Detects suspicious powershell process which includes bxor command, alternative obfuscation method to b64 encoded commands.
|
|
status: experimental
|
|
author: Teymur Kheirkhabarov, Harish Segar (rule)
|
|
date: 2020/06/29
|
|
modified: 2021/10/16
|
|
tags:
|
|
- attack.execution
|
|
- attack.t1059.001
|
|
- attack.t1086 #an old one
|
|
logsource:
|
|
product: windows
|
|
category: ps_classic_start
|
|
definition: fields have to be extract from event
|
|
detection:
|
|
selection:
|
|
HostName: "ConsoleHost"
|
|
filter:
|
|
HostApplication|contains:
|
|
- "bxor"
|
|
- "join"
|
|
- "char"
|
|
condition: selection and filter
|
|
falsepositives:
|
|
- unknown
|
|
level: medium
|