New Outlook Macro Created

Description

Detects the creation of a macro file for Outlook.

Query · sigma

selection:
  Image|endswith: \outlook.exe
  TargetFilename|endswith: \Microsoft\Outlook\VbaProject.OTM
condition: selection

Known false positives

  • User genuinely creates a VB Macro for their email
Raw source New Outlook Macro Created · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: New Outlook Macro Created
id: 8c31f563-f9a7-450c-bfa8-35f8f32f1f61
related:
    - id: 117d3d3a-755c-4a61-b23e-9171146d094c
      type: derived
status: test
description: Detects the creation of a macro file for Outlook.
references:
    - https://www.mdsec.co.uk/2020/11/a-fresh-outlook-on-mail-based-persistence/
author: '@ScoubiMtl'
date: 2021-04-05
modified: 2023-02-08
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.command-and-control
    - attack.t1137
    - attack.t1008
    - attack.t1546
logsource:
    category: file_event
    product: windows
detection:
    selection:
        Image|endswith: '\outlook.exe'
        TargetFilename|endswith: '\Microsoft\Outlook\VbaProject.OTM'
    condition: selection
falsepositives:
    - User genuinely creates a VB Macro for their email
level: medium

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