Wab Execution From Non Default Location

Description

Detects execution of wab.exe (Windows Contacts) and Wabmig.exe (Microsoft Address Book Import Tool) from non default locations as seen with bumblebee activity

Query · sigma

selection:
  Image|endswith:
  - \wab.exe
  - \wabmig.exe
filter:
  Image|startswith:
  - C:\Windows\WinSxS\
  - C:\Program Files\Windows Mail\
  - C:\Program Files (x86)\Windows Mail\
condition: selection and not filter

Known false positives

  • Unknown
Raw source Wab Execution From Non Default Location · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Wab Execution From Non Default Location
id: 395907ee-96e5-4666-af2e-2ca91688e151
status: test
description: Detects execution of wab.exe (Windows Contacts) and Wabmig.exe (Microsoft Address Book Import Tool) from non default locations as seen with bumblebee activity
references:
    - https://thedfirreport.com/2022/08/08/bumblebee-roasts-its-way-to-domain-admin/
    - https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/bumblebee-loader-cybercrime
    - https://thedfirreport.com/2022/09/26/bumblebee-round-two/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-12
modified: 2022-09-27
tags:
    - attack.execution
    - attack.stealth
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith:
            - '\wab.exe'
            - '\wabmig.exe'
    filter:
        Image|startswith:
            - 'C:\Windows\WinSxS\'
            - 'C:\Program Files\Windows Mail\'
            - 'C:\Program Files (x86)\Windows Mail\'
    condition: selection and not filter
falsepositives:
    - Unknown
level: high

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