Windows Process Creation: Execution of vbc.exe Spawned from more.com

ATT&CK techniques

Priv Esc → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1055Process Injection
Defense Evasion
- T1055Process Injection
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule identifies when a process with a parent image ending in "more.com" launches a child process ending in "vbc.exe" (also matching OriginalFileName "vbc.exe"). This behavior is notable because it aligns with malware execution chains where the initial loader activity leads to a follow-on payload process. Telemetry required includes Windows process creation events containing ParentImage, Image, and OriginalFileName fields.

Reporting behind it

Related detections9 linkedT1055 — drag to rearrange

Suspicious Office Application Spawning Script Or Shell Interpreter

Suspicious Network Connection From wabmig.exe (Turian Injection)

Suspicious Outbound Network Connection from Explorer Process

Suspicious AppLaunch.exe Spawned As Injection Target (via process_creation)

Suspicious BugSleep Marker File in Public Directory

Suspicious CRAT Injection Named Pipe ChromeUpdatePipe (via pipe_created)

AsyncRAT Injector libPK.dll Written to Public Folder (via file_event)

FlawedGrace spawning threat injection target

In-Memory Ramnit Process Injection Target Spawned by WmiPrvSE in drIBAN Fraud Operation (via process_creation)

Windows Process Creation: Execution of vbc.exe Spawned from more.com

Pivot detection · T1055 · 9 related

Changelog

v5

v5
Candidate ingested via manual entry.2026-07-31
v4
Candidate ingested via manual entry.2026-07-31
v3
Candidate ingested via manual entry.2026-07-31
v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

windows-process-execution-more-com-spawning-vbc-exe-lummac-stealer-behavior-19b3806e

title: "Windows Process Creation: Execution of vbc.exe Spawned from more.com"
id: 59bfc4a5-6efa-4c27-9e64-d65ccbb86436
status: experimental
description: This rule identifies when a process with a parent image ending in "more.com" launches a child process ending in "vbc.exe" (also matching OriginalFileName "vbc.exe"). This behavior is notable because it aligns with malware execution chains where the initial loader activity leads to a follow-on payload process. Telemetry required includes Windows process creation events containing ParentImage, Image, and OriginalFileName fields.
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
  - https://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2024/Malware/Lummac-Stealer/proc_creation_win_malware_lummac_more_vbc.yml
author: Joseliyo Sanchez, @Joseliyo_Jstnk, Huntrule Team
date: 2024-12-19
tags:
  - attack.privilege-escalation
  - attack.stealth
  - attack.t1055
  - detection.emerging-threats
logsource:
  category: process_creation
  product: windows
detection:
  selection_parent:
    ParentImage|endswith: \more.com
  selection_child:
    - Image|endswith: \vbc.exe
    - OriginalFileName: vbc.exe
  condition: all of selection_*
falsepositives:
  - Unknown
level: high
license: DRL-1.1
related:
  - id: 19b3806e-46f2-4b4c-9337-e3d8653245ea
    type: derived

Convert

This rule as a query you can run. Uses no unlock credit.

SplunkSPL