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containedcritical

Malicious code in @antv/word-scale-chart (npm)

A threat actor compromised the npm account `atool` and published 631 malicious versions across 314 npm packages, including @antv/word-scale-chart, as part of the "Mini Shai-Hulud" supply chain attack campaign. Each malicious version injects a preinstall hook executing an obfuscated Bun script that exfiltrates credentials and establishes persistence via CI/CD workflow injection and system daemons.

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Disclosed
Last updated
Blast radius
631 malicious versions across 314 npm packages; widespread credential theft affecting AWS, GitHub, npm, GCP, Azure, Kubernetes, SSH, Docker, databases, Stripe, and Slack
Ecosystems
npm
Attack vectors
Compromised packageAccount takeover
Threat actor
Mini Shai Hulud
Affected entities
  • @antv/word-scale-chartMalicious preinstall hook injected

The npm account atool was compromised and used to publish 631 malicious versions across 314 npm packages in an automated 22-minute burst. This incident is part of the "Mini Shai-Hulud" supply chain attack campaign.

Each malicious version injects a preinstall hook that executes a 498KB obfuscated Bun script. The script uses the GitHub API as a covert exfiltration channel and steals a broad range of credentials: AWS keys, GitHub PATs, npm tokens, GCP service accounts, Azure credentials, Kubernetes service account tokens, SSH keys, Docker auth configs, database connection strings, Stripe keys, and Slack tokens. Stolen credentials are committed to attacker-controlled repositories following Dune-themed naming patterns (e.g., harkonnen-melange-742).

The malicious packages establish persistence through multiple mechanisms: CI/CD workflow injection (a GitHub Actions workflow named Run Copilot dumps all secrets via toJSON(secrets)), AI agent session hooks, and a system daemon named kitty-monitor.

The package @antv/word-scale-chart was confirmed to contain the malicious preinstall hook by both Amazon Inspector and Google Open Source Security sources.

Indicators of compromise

Packages
  • @antv/word-scale-chart

Remediation

  • Immediately remove or downgrade @antv/word-scale-chart to a version prior to the malicious release
  • Audit npm account `atool` and revoke all access tokens and credentials
  • Rotate all credentials that may have been exposed (AWS keys, GitHub PATs, npm tokens, GCP service accounts, Azure credentials, Kubernetes tokens, SSH keys, Docker auth, database credentials, Stripe keys, Slack tokens)
  • Inspect CI/CD workflows for unauthorized `Run Copilot` workflows and remove them
  • Check system processes for the `kitty-monitor` daemon and remove if present
  • Review git commit history in repositories for suspicious commits with Dune-themed names
  • Monitor npm account activity and enable multi-factor authentication
  • Scan all systems that installed affected packages for persistence mechanisms

Sources

  1. GitHub Advisory GHSA-wrw9-4r4g-qjmh · GitHub Advisory Database

Cite this entry

"Malicious code in @antv/word-scale-chart (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 27, 2026; last updated July 28, 2026. https://supplychainattack.org/incident/malicious-code-in-antv-word-scale-chart-npm-mdk30n

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