huntrule

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

Alerts when more.com starts vbc.exe on Windows, matching a known stealer execution pattern.

FreeReviewedSigma · High · v5
Product
windows
Category
process_creation
Author
Joseliyo Sanchez, @Joseliyo_Jstnk (SigmaHQ), DRL 1.1
Published
2024-12-19
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Priv Esc → Defense Evasion

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. 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

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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
  1. v5
    Candidate ingested via manual entry.2026-07-31
  2. v4
    Candidate ingested via manual entry.2026-07-31
  3. v3
    Candidate ingested via manual entry.2026-07-31
  4. v2
    Candidate ingested via manual entry.2026-07-31
  5. 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.