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Introduction:
A sophisticated new supply chain attack has emerged targeting the Node Package Manager (npm) ecosystem, leveraging a malicious package named “undicy-http” to deploy a dual-purpose threat. This attack combines a screen-streaming Remote Access Trojan (RAT) with a browser injector, representing a dangerous evolution in software supply chain compromise, where seemingly legitimate dependencies become the vector for persistent surveillance and data theft.
Learning Objectives:
- Understand the mechanics of npm typosquatting attacks and how “undicy-http” mimics legitimate libraries.
- Learn to detect and analyze malicious npm packages using static analysis, dependency auditing, and network monitoring.
- Implement defensive strategies to prevent and respond to supply chain compromises in development environments.
You Should Know:
1. Anatomy of the “undicy-http” Malicious Package
The “undicy-http” package is a prime example of typosquatting, designed to resemble the popular “undici” HTTP client library. Upon installation, the package executes a multi-stage payload. The initial phase involves a post-install script that fetches a secondary payload from a remote server. This payload establishes persistence by creating scheduled tasks on Windows or cron jobs on Linux, ensuring the malware survives reboots. The final stage deploys a screen-streaming RAT that captures the victim’s screen at regular intervals and exfiltrates the data to a command-and-control (C2) server, alongside a browser injector that targets credential fields across multiple browsers.
Step‑by‑step guide: Manual Detection and Analysis
To analyze a suspicious npm package locally, follow these steps to inspect its behavior without executing it in a production environment.
1. Set up a sandboxed environment:
Using Docker to isolate the analysis docker run -it --rm node:18-slim bash
2. Download the package without installing:
npm pack undicy-http tar -xzf undicy-http-.tgz cd package
3. Inspect `package.json` for malicious scripts:
cat package.json | grep -A 5 "scripts"
Look for suspicious entries like "postinstall", "preinstall", or `”install”` that point to obfuscated JavaScript files or external URLs.
4. Examine network behavior statically:
grep -r "http://" . --include=".js" | grep -v "node_modules" grep -r "child_process" . --include=".js"
This reveals any hardcoded C2 URLs or attempts to execute system commands.
2. Detecting Compromised npm Dependencies
Identifying malicious packages in your existing projects requires a combination of audit tools and behavioral monitoring. The “undicy-http” attack highlights the need for proactive scanning beyond simple vulnerability databases.
Step‑by‑step guide: Auditing Your npm Dependencies
- Run npm audit to check for known vulnerabilities:
npm audit --json > audit_results.json
While this catches known issues, it may not detect novel typosquatting attacks, so additional steps are required.
-
Use `npm ls` to review the dependency tree:
npm ls --depth=5 | grep undicy-http
This command helps identify if the malicious package has been introduced as a transitive dependency.
3. Implement integrity checking with `npm ci`:
Use package-lock.json to ensure exact versions and hashes npm ci
This enforces that installed packages match the lock file, preventing unexpected version drift that could introduce malicious updates.
- Monitor outgoing network connections from Node.js processes (Windows & Linux):
Linux:
Monitor for connections from Node.js processes sudo netstat -tunap | grep node Or use lsof sudo lsof -i -P -n | grep node
Windows (PowerShell as Administrator):
Monitor active connections with process IDs
Get-NetTCPConnection | Where-Object {$_.OwningProcess -in (Get-Process node).Id}
Use netstat for a quick view
netstat -ano | findstr node
3. Mitigation and Hardening Against Supply Chain Attacks
Preventing these attacks requires a shift-left security approach, integrating checks at the development and build stages. The following steps outline how to harden your CI/CD pipelines and developer workstations against threats like the “undicy-http” package.
Step‑by‑step guide: Implementing Supply Chain Security Controls
1. Use private npm registries or a proxy:
Configure a private registry like Verdaccio or use npm’s `–registry` option to point to a curated proxy that blocks known malicious packages. This acts as a gatekeeper before packages reach your developers.
2. Enforce package signing and integrity:
Enable npm's package provenance (requires npm 9+) npm set provenance true
This ensures packages are signed and verified against the registry, though it’s more effective for publishing your own packages; for consumption, use npm audit signatures.
3. Deploy endpoint detection and response (EDR) rules:
Create custom rules to detect screen capture APIs or browser injection attempts. For example, on Windows, monitor for unusual calls to the Windows API functions like `BitBlt` (used for screen capture) from Node.js processes.
Windows PowerShell (Suspicious Process Monitoring):
Monitor for Node processes accessing screen capture APIs (example using Sysmon logs)
Get-WinEvent -FilterHashtable @{LogName='Microsoft-Windows-Sysmon/Operational'; ID=10} | Where-Object { $<em>.Message -match "node.exe" -and $</em>.Message -match "BitBlt" }
4. Leverage software bills of materials (SBOMs):
Generate an SBOM for your applications using tools like `syft` or cyclonedx-npm. This provides a complete inventory of dependencies, enabling rapid identification of new threats.
Generate an SBOM with CycloneDX npm install -g @cyclonedx/cyclonedx-npm cyclonedx-npm --sbom-version 1.4 --output bom.json
5. Implement runtime protection:
For high-risk applications, use a runtime security agent that can block unexpected behavior like file system writes to sensitive directories or unauthorized network connections from Node.js processes.
What Undercode Say:
- Typosquatting remains a highly effective attack vector. The “undicy-http” incident underscores how a one-character deviation from a popular library can compromise thousands of developers. Continuous education on verifying package names and sources is non-negotiable.
- Post-install scripts are a primary threat surface. The malicious behavior was triggered immediately after installation. Organizations should consider blocking or sandboxing npm install processes in build pipelines and mandating manual review of all `preinstall` and `postinstall` scripts.
Analysis: This attack combines traditional supply chain compromise with advanced persistence and surveillance capabilities. The screen-streaming RAT component elevates the threat from data theft to real-time intelligence gathering, potentially capturing sensitive credentials, intellectual property, or internal dashboards. The browser injector suggests a secondary objective of financial fraud or account takeover. The multi-stage payload delivery indicates a level of sophistication aimed at evading static analysis tools, as the core malicious logic is downloaded post-installation. For defenders, this means that signature-based detection alone is insufficient; behavioral monitoring and strict control over outbound network traffic from development environments are now critical. The use of legitimate Node.js features like `child_process` and `http` modules to perform malicious actions highlights the challenge of distinguishing between normal and malicious developer activity.
Prediction:
This attack marks a shift towards more invasive, surveillance-oriented malware within the software supply chain. We predict a rise in “blended” threats that combine credential theft with persistent monitoring capabilities, targeting not just individual developers but entire organizations through compromised build agents and CI/CD systems. As a result, security teams will increasingly adopt immutable build environments and enforce strict network segmentation for development and build infrastructure. Additionally, npm and other package registries will likely be forced to implement stronger pre-publication security checks, including automated behavioral analysis of new package submissions, to prevent such threats from ever reaching the ecosystem.
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IT/Security Reporter URL:
Reported By: Tushar Subhra – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
