title: Lummac Stealer Activity - Execution Of More.com And Vbc.exe
id: 19b3806e-46f2-4b4c-9337-e3d8653245ea
status: experimental
description: |
Detects the execution of more.com and vbc.exe in the process tree.
This behavior was observed by a set of samples related to Lummac Stealer.
The Lummac payload is injected into the vbc.exe process.
references:
- https://www.virustotal.com/gui/search/behaviour_processes%253A%2522C%253A%255C%255CWindows%255C%255CSysWOW64%255C%255Cmore.com%2522%2520behaviour_processes%253A%2522C%253A%255C%255CWindows%255C%255CMicrosoft.NET%255C%255CFramework%255C%255Cv4.0.30319%255C%255Cvbc.exe%2522/files
- https://www.virustotal.com/gui/file/14d886517fff2cc8955844b252c985ab59f2f95b2849002778f03a8f07eb8aef
- https://strontic.github.io/xcyclopedia/library/more.com-EDB3046610020EE614B5B81B0439895E.html
- https://strontic.github.io/xcyclopedia/library/vbc.exe-A731372E6F6978CE25617AE01B143351.html
author: Joseliyo Sanchez, @Joseliyo_Jstnk
date: 2024-12-19
tags:
- attack.privilege-escalation
- attack.stealth
- attack.t1055
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
# VT Query: behaviour_processes:"C:\\Windows\\SysWOW64\\more.com" behaviour_processes:"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\vbc.exe"
selection_parent:
ParentImage|endswith: '\more.com'
selection_child:
- Image|endswith: '\vbc.exe'
- OriginalFileName: 'vbc.exe'
condition: all of selection_*
falsepositives:
- Unknown
level: high