Detection rules › Sigma
Microsoft VBA For Outlook Addin Loaded Via Outlook
Detects outlvba (Microsoft VBA for Outlook Addin) DLL being loaded by the outlook process
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: Microsoft VBA For Outlook Addin Loaded Via Outlook
id: 9a0b8719-cd3c-4f0a-90de-765a4cb3f5ed
status: test
description: Detects outlvba (Microsoft VBA for Outlook Addin) DLL being loaded by the outlook process
references:
- https://speakerdeck.com/heirhabarov/hunting-for-persistence-via-microsoft-exchange-server-or-outlook?slide=58
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-02-08
modified: 2024-03-12
tags:
- attack.execution
- attack.t1204.002
logsource:
category: image_load
product: windows
detection:
selection:
Image|endswith: '\outlook.exe'
ImageLoaded|endswith: '\outlvba.dll'
condition: selection
falsepositives:
- Legitimate macro usage. Add the appropriate filter according to your environment
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith: '\outlook.exe'
ImageLoaded|endswith: '\outlvba.dll'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Image | ends_with |
| field:"Image" kind:ends_with value:"\outlook.exe" |
ImageLoaded | ends_with |
| field:"ImageLoaded" kind:ends_with value:"\outlvba.dll" |