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PowerShell Downgrade Attack - PowerShell

Detects PowerShell downgrade attack by comparing the host versions with the actually used engine version 2.0

MITRE ATT&CK

defense-evasionexecution

Detection Query

selection:
  Data|contains: EngineVersion=2.
filter_main:
  Data|contains: HostVersion=2.
condition: selection and not filter_main

Author

Florian Roth (Nextron Systems), Lee Holmes (idea), Harish Segar (improvements)

Created

2017-03-22

Data Sources

windowsps_classic_start

Platforms

windows

References

http://www.leeholmes.com/blog/2017/03/17/detecting-and-preventing-powershell-downgrade-attacks/

Tags

attack.defense-evasionattack.executionattack.t1059.001

Raw Content

title: PowerShell Downgrade Attack - PowerShell
id: 6331d09b-4785-4c13-980f-f96661356249
status: test
description: Detects PowerShell downgrade attack by comparing the host versions with the actually used engine version 2.0
references:
    - http://www.leeholmes.com/blog/2017/03/17/detecting-and-preventing-powershell-downgrade-attacks/
author: Florian Roth (Nextron Systems), Lee Holmes (idea), Harish Segar (improvements)
date: 2017-03-22
modified: 2023-10-27
tags:
    - attack.defense-evasion
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_classic_start
detection:
    selection:
        Data|contains: 'EngineVersion=2.'
    filter_main:
        Data|contains: 'HostVersion=2.'
    condition: selection and not filter_main
falsepositives:
    - Unknown
level: medium