sigmahighHunting

Wab/Wabmig Unusual Parent Or Child Processes

Detects unusual parent or children of the wab.exe (Windows Contacts) and Wabmig.exe (Microsoft Address Book Import Tool) processes as seen being used with bumblebee activity

Detection Query

selection_parent:
  ParentImage|endswith:
    - \WmiPrvSE.exe
    - \svchost.exe
    - \dllhost.exe
  Image|endswith:
    - \wab.exe
    - \wabmig.exe
selection_child:
  ParentImage|endswith:
    - \wab.exe
    - \wabmig.exe
condition: 1 of selection_*

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2022-08-12

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.executionattack.stealth

Raw Content

title: Wab/Wabmig Unusual Parent Or Child Processes
id: 63d1ccc0-2a43-4f4b-9289-361b308991ff
status: test
description: Detects unusual parent or children of the wab.exe (Windows Contacts) and Wabmig.exe (Microsoft Address Book Import Tool) processes as seen being used 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_parent:
        ParentImage|endswith:
            # Add more if known
            - \WmiPrvSE.exe
            - \svchost.exe
            - \dllhost.exe
        Image|endswith:
            - '\wab.exe'
            - '\wabmig.exe' # (Microsoft Address Book Import Tool)
    selection_child:
        # You can add specific suspicious child processes (such as cmd, powershell...) to increase the accuracy
        ParentImage|endswith:
            - '\wab.exe'
            - '\wabmig.exe' # (Microsoft Address Book Import Tool)
    condition: 1 of selection_*
falsepositives:
    - Unknown
level: high