Detection rules › Sigma
VBA DLL Loaded Via Office Application
Detects VB DLL's loaded by an office application. Which could indicate the presence of VBA Macros.
Known false positives
- Legitimate macro usage. Add the appropriate filter according to your environment
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 7: Image loaded |
Rule body
title: VBA DLL Loaded Via Office Application
id: e6ce8457-68b1-485b-9bdd-3c2b5d679aa9
status: test
description: Detects VB DLL's loaded by an office application. Which could indicate the presence of VBA Macros.
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|endswith:
- '\VBE7.DLL'
- '\VBEUI.DLL'
- '\VBE7INTL.DLL'
condition: selection
falsepositives:
- Legitimate macro usage. Add the appropriate filter according to your environment
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith:
- '\excel.exe'
- '\mspub.exe'
- '\onenote.exe'
- '\onenoteim.exe'
- '\outlook.exe'
- '\powerpnt.exe'
- '\winword.exe'
ImageLoaded|endswith:
- '\VBE7.DLL'
- '\VBEUI.DLL'
- '\VBE7INTL.DLL'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with |
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with |