Vxidl
Overview
Executive Summary
Vxidl (often detected as VBS/Vxidl or Virus.VBS.Vxidl) is a classification for legacy script-based viruses and worms, typically written in VBScript (Visual Basic Script) or utilizing Microsoft's Interface Definition Language (IDL) components. While less sophisticated than modern compiled malware, these scripts are highly destructive, designed to rapidly propagate across local networks and aggressively sabotage the host operating system.Infection Vector and Technical Capabilities
Vxidl variants primarily propagate through email (as malicious attachments pretending to be documents or images) or by copying themselves to mapped network drives and removable media (USB drives). Upon execution by the Windows Script Host (`wscript.exe`), the malware operates rapidly:- Mass Mailing (Worm Functionality): Similar to early macro viruses, Vxidl often accesses the Microsoft Outlook Address Book via COM objects, silently emailing copies of itself to all of the victim's contacts to fuel exponential spread.
- File Overwriting and Vandalism: The core payload is often purely destructive. The script recursively searches local and network drives for specific file types (like `.doc`, `.xls`, `.jpg`, or `.mp3`) and overwrites their contents with malicious VBScript code, effectively destroying the original data while turning the files into new infection vectors.
- System Instability: Vxidl frequently modifies the Windows Registry (e.g., altering `HKLM\Software\Microsoft\Windows\CurrentVersion\Run`) to ensure it executes on startup. It may also intentionally delete critical system files to render the OS unbootable.
Threat Assessment
While modern email gateways and hardened Windows configurations (which restrict the execution of unsigned VBScripts) mitigate the spread of Vxidl, an infection within an unpatched network is catastrophic. The file-overwriting payload causes permanent data loss that cannot be reversed without offline backups.Remediation and Eradication
- Script Execution Policies: The most effective defense against Vxidl and similar script-based threats is to enforce strict Group Policies that disable the Windows Script Host or restrict the execution of `.vbs`, `.js`, and `.wsh` files associated with `wscript.exe`.
- Network Containment: Immediately disconnect infected machines from the network to halt the worm's propagation via SMB shares and outbound email.
- Data Restoration: Because the malware overwrites file contents rather than simply hiding or encrypting them, files "infected" by Vxidl are generally destroyed and must be restored from a secure backup.
Known aliases
Threat reports may refer to this family under multiple names:
MITRE ATT&CK Techniques
This family has been observed using the following ATT&CK techniques: T1059.005 T1485 T1566.001 T1114.003
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1059.005: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.
- T1566.001: Scan email attachments for malicious macros, scripts, or suspicious archive files.
Generated Detections (Boilerplate)
These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.
YARA Rule
rule MALWARE_WIN_VXIDL {
meta:
description = "Detects Vxidl (advanced_threat)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "vxidl" ascii wide nocase
$s2 = "vbs.vxidl" ascii wide nocase
$s3 = "virus.vbs.vxidl" ascii wide nocase
$s4 = "worm.vbs" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Vxidl Activity
id: bbaa1024c4379b65b70b8dcc7aca555c
status: experimental
description: Detects generic indicators of the vxidl malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*vxidl*"
- "*vbs.vxidl*"
- "*virus.vbs.vxidl*"
- "*worm.vbs*"
condition: selection
level: mediumReferences & External Analysis
- Search "vxidl" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Vxidl Advanced_Threat from Windows?
Manual removal of Vxidl is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Vxidl a virus or a Advanced_Threat?
Vxidl is classified as a Advanced_Threat. Unlike traditional viruses that infect files, modern malware like Vxidl typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Vxidl infection?
Symptoms of Vxidl can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Related Families (Category: advanced_threat)
Explore other malware families in the same category:
Protect Your Network Against Advanced_Threats
Want to prevent Vxidl and similar threats from compromising your organization? Read our comprehensive defensive guide: Suspect an Infection? What to do.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/vxidl.json
Ecosystem & Interactive Environments
This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.