GAC DLL Loaded Via Office Applications
Detects any GAC DLL being loaded by an Office Product
Detection logic
selection
Image|endswith:
- \excel.exe
- \mspub.exe
- \onenote.exe
- \onenoteim.exe
- \outlook.exe
- \powerpnt.exe
- \winword.exe
ImageLoaded|startswith: C:\Windows\Microsoft.NET\assembly\GAC_MSILCondition
selectionRaw YAML
title: GAC DLL Loaded Via Office Applications
id: 90217a70-13fc-48e4-b3db-0d836c5824ac
status: test
description: Detects any GAC DLL being loaded by an Office Product
references:
- https://medium.com/threatpunter/detecting-adversary-tradecraft-with-image-load-event-logging-and-eql-8de93338c16
author: Antonlovesdnb
date: 2020-02-19
modified: 2023-02-10
tags:
- attack.execution
- attack.t1204.002
logsource:
category: image_load
product: windows
detection:
selection:
Image|endswith:
- '\excel.exe'
- '\mspub.exe'
- '\onenote.exe'
- '\onenoteim.exe' # Just in case
- '\outlook.exe'
- '\powerpnt.exe'
- '\winword.exe'
ImageLoaded|startswith: 'C:\Windows\Microsoft.NET\assembly\GAC_MSIL'
condition: selection
falsepositives:
- Legitimate macro usage. Add the appropriate filter according to your environment
level: highFalse positives
- Legitimate macro usage. Add the appropriate filter according to your environment