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PowerShell Core DLL Loaded Via Office Application

Detects PowerShell core DLL being loaded by an Office Product

Detection Query

selection:
  Image|endswith:
    - \excel.exe
    - \mspub.exe
    - \outlook.exe
    - \onenote.exe
    - \onenoteim.exe
    - \powerpnt.exe
    - \winword.exe
  ImageLoaded|contains:
    - \System.Management.Automation.Dll
    - \System.Management.Automation.ni.Dll
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-06-01

Data Sources

windowsImage Load Events

Platforms

windows

References

Internal Research

Tags

attack.defense-evasion

Raw Content

title: PowerShell Core DLL Loaded Via Office Application
id: bb2ba6fb-95d4-4a25-89fc-30bb736c021a
status: test
description: Detects PowerShell core DLL being loaded by an Office Product
references:
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-06-01
tags:
    - attack.defense-evasion
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Image|endswith:
            - '\excel.exe'
            - '\mspub.exe'
            - '\outlook.exe'
            - '\onenote.exe'
            - '\onenoteim.exe' # Just in case
            - '\powerpnt.exe'
            - '\winword.exe'
        ImageLoaded|contains:
            - '\System.Management.Automation.Dll'
            - '\System.Management.Automation.ni.Dll'
    condition: selection
falsepositives:
    - Unknown
level: medium