mirror of
https://github.com/valitydev/SigmaHQ.git
synced 2024-11-09 02:26:48 +00:00
38 lines
1.4 KiB
YAML
Executable File
38 lines
1.4 KiB
YAML
Executable File
title: In-memory PowerShell
|
|
id: 092bc4b9-3d1d-43b4-a6b4-8c8acd83522f
|
|
status: experimental
|
|
description: Detects loading of essential DLL used by PowerShell, but not by the process powershell.exe. Detects meterpreter's "load powershell" extension.
|
|
author: Tom Kern, oscd.community
|
|
date: 2019/11/14
|
|
modified: 2019/11/30
|
|
references:
|
|
- https://adsecurity.org/?p=2921
|
|
- https://github.com/p3nt4/PowerShdll
|
|
tags:
|
|
- attack.t1086 # an old one
|
|
- attack.t1059.001
|
|
- attack.execution
|
|
logsource:
|
|
category: image_load
|
|
product: windows
|
|
detection:
|
|
selection:
|
|
ImageLoaded|endswith:
|
|
- '\System.Management.Automation.Dll'
|
|
- '\System.Management.Automation.ni.Dll'
|
|
filter:
|
|
Image|endswith:
|
|
- '\powershell.exe'
|
|
- '\powershell_ise.exe'
|
|
- '\WINDOWS\System32\sdiagnhost.exe'
|
|
- '\mscorsvw.exe' # c:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorsw.exe for instance
|
|
- '\WINDOWS\System32\RemoteFXvGPUDisablement.exe' # on win10
|
|
# User: 'NT AUTHORITY\SYSTEM' # if set, matches all powershell processes not launched by SYSTEM
|
|
condition: selection and not filter
|
|
falsepositives:
|
|
- Used by some .NET binaries, minimal on user workstation.
|
|
level: high
|
|
enrichment:
|
|
- EN_0001_cache_sysmon_event_id_1_info # http://bit.ly/314zc6x
|
|
- EN_0003_enrich_other_sysmon_events_with_event_id_1_data # http://bit.ly/2ojW7fw
|