Houdini / H-Worm (also known as Houdini, H-Worm, Dunihi, WSH RAT) is a VBScript-based remote access trojan active since 2013. VBS-based worm RAT. Key capabilities include: USB propagation, keylogging, file manager, command execution, VBS/WSH-based delivery.
Overview & Background
VBS-based worm RAT. First observed in 2013, Houdini is attributed to eCrime. The malware is written in VBScript and provides operators with comprehensive remote access capabilities.
Houdini continues to be actively distributed and used in campaigns targeting organizations worldwide. Its capabilities include: USB propagation, keylogging, file manager, command execution, VBS/WSH-based delivery.
- Language: VBScript
- Active since: 2013
- Attribution: eCrime
- Also known as: Houdini, H-Worm, Dunihi, WSH RAT
Technical Capabilities
- Usb Propagation: Core Houdini capability T1059
- Keylogging: Core Houdini capability T1059
- File Manager: Core Houdini capability T1059
- Command Execution: Core Houdini capability T1059
- Vbs/Wsh-Based Delivery: Core Houdini capability T1059
Distribution Methods
Houdini is typically distributed through phishing emails with malicious attachments, cracked software downloads, and malvertising campaigns. Common delivery mechanisms include Office macros, ISO/IMG containers, and script-based downloaders.
- Phishing emails: Malicious attachments and links T1566.001
- Malvertising: SEO poisoning and malicious ads T1189
- Cracked software: Bundled with pirated applications
MITRE ATT&CK Mapping
| Tactic | Technique | Usage |
|---|---|---|
| Initial Access | T1566.001 Phishing Attachment | Malicious email attachments |
| Execution | T1204.002 Malicious File | User executes RAT payload |
| Persistence | T1547.001 Registry Run Keys | Autostart persistence |
| Defense Evasion | T1027 Obfuscated Files | Payload obfuscation |
| Credential Access | T1056.001 Keylogging | Keystroke capture |
| Collection | T1113 Screen Capture | Screenshot collection |
| Collection | T1125 Video Capture | Webcam access |
| C2 | T1071.001 Web Protocols | HTTP/HTTPS C2 communication |
Detection & Defense
- Endpoint detection: Monitor for VBScript processes with network connections from unusual locations
- Network monitoring: Detect C2 traffic patterns associated with Houdini
- Email security: Block malicious attachments and links in phishing campaigns
- Application whitelisting: Restrict execution of unauthorized binaries
- YARA rules: Deploy detection signatures for known Houdini variants
Protect Against Remote Access Trojans
Mjolnir Security provides comprehensive detection and response capabilities against Houdini and similar RAT threats.
- RAT Detection & Removal Identify and remediate Houdini infections including persistence mechanisms and lateral movement artifacts.
- Threat Intelligence Continuous monitoring for Houdini campaigns and infrastructure targeting your organization.
- 24/7 Incident Response Rapid containment and forensic investigation. Call +1 833 403 5875.
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