Shai-Hulud Supply Chain Attack

Critical Security Alert: The Shai-Hulud worm represents one of the most aggressive npm supply chain attacks observed in 2025.

What is Shai-Hulud?

Shai-Hulud is a self-replicating worm that has compromised over 700 npm packages, affecting thousands of organizations worldwide. The attack uses sophisticated techniques to steal credentials and propagate through the JavaScript ecosystem.

Key Details

First Wave: September 2025 - Over 500 packages compromised
Second Wave: November 2025 - 700+ additional packages affected
Impact: 25,000+ malicious GitHub repositories created
Targets: GitHub tokens, npm credentials, AWS/GCP/Azure keys

Attack Method

The malware executes during the preinstall phase, even before package installation completes. It harvests credentials from the local filesystem and cloud environments, then exfiltrates them to public GitHub repositories labeled "Shai-Hulud: The Second Coming."

Notable Victims: Major packages from Zapier, PostHog, Postman, and ENS Domains were temporarily compromised.

Protection Measures

Audit your dependencies for compromised packages
Rotate all npm tokens, GitHub PATs, and cloud credentials
Enable phishing-resistant MFA
Pin dependencies to known clean versions
Restrict lifecycle scripts in CI/CD pipelines

URLs and Tokens

For Security Purposes, the URL and Token are shown via separate code

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