Fukusuke Takahashi
587da70c94
update: Suspicious XOR Encoded PowerShell Command Line - PowerShell update: Uncommon PowerShell Hosts update: Delete Volume Shadow Copies Via WMI With PowerShell update: PowerShell Downgrade Attack - PowerShell update: PowerShell Called from an Executable Version Mismatch update: Netcat The Powershell Version update: Remote PowerShell Session (PS Classic) update: Renamed Powershell Under Powershell Channel update: Suspicious PowerShell Download update: Use Get-NetTCPConnection update: Zip A Folder With PowerShell For Staging In Temp - PowerShell update: Tamper Windows Defender - PSClassic update: Suspicious Non PowerShell WSMAN COM Provider update: Suspicious XOR Encoded PowerShell Command Line - PowerShell --------- Co-authored-by: Nasreddine Bencherchali <8741929+nasbench@users.noreply.github.com>
26 lines
821 B
YAML
26 lines
821 B
YAML
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
|