rules/windows/process_creation/win_powershell_b64_shellcode.yml

title: PowerShell Base64 Encoded Shellcode
id: 2d117e49-e626-4c7c-bd1f-c3c0147774c8
status: test
description: Detects Base64 encoded Shellcode
author: Florian Roth
references:
  - https://twitter.com/cyb3rops/status/1063072865992523776
date: 2018/11/17
modified: 2021/11/27
logsource:
  category: process_creation
  product: windows
detection:
  selection1:
    CommandLine|contains: 'AAAAYInlM'
  selection2:
    CommandLine|contains:
      - 'OiCAAAAYInlM'
      - 'OiJAAAAYInlM'
  condition: selection1 and selection2
falsepositives:
  - Unknown
level: critical
tags:
  - attack.defense_evasion
  - attack.t1027
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`title: PowerShell Base64 Encoded Shellcode`
Added UUIDs to rules 2019-11-12 23:12:27 +01:00			`id: 2d117e49-e626-4c7c-bd1f-c3c0147774c8`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`status: test`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`description: Detects Base64 encoded Shellcode`
			`author: Florian Roth`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`references:`
			`- https://twitter.com/cyb3rops/status/1063072865992523776`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`date: 2018/11/17`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`modified: 2021/11/27`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`logsource:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`category: process_creation`
			`product: windows`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`detection:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`selection1:`
			`CommandLine\|contains: 'AAAAYInlM'`
			`selection2:`
			`CommandLine\|contains:`
			`- 'OiCAAAAYInlM'`
			`- 'OiJAAAAYInlM'`
			`condition: selection1 and selection2`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`falsepositives:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`- Unknown`
Converted Sysmon/1 and Security/4688 to generic process creation rules 2019-01-16 23:36:31 +01:00			`level: critical`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`tags:`
			`- attack.defense_evasion`
			`- attack.t1027`