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containedcritical

Malicious code in @antv/g-plugin-canvaskit-renderer (npm)

The npm account `atool` was compromised and used to publish 631 malicious versions across 314 packages, including @antv/g-plugin-canvaskit-renderer, 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 workflows 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
Account takeoverCompromised package
Threat actor
Mini Shai Hulud
Affected entities
  • @antv/g-plugin-canvaskit-rendererMalicious preinstall hook injected; part of Mini Shai-Hulud campaign

A threat actor compromised the npm account atool and launched an automated attack publishing 631 malicious versions across 314 npm packages in a 22-minute burst. This incident is part of the "Mini Shai-Hulud" supply chain attack campaign.

The @antv/g-plugin-canvaskit-renderer package was among those compromised, with a malicious preinstall hook injected into affected versions. The hook executes a 498KB obfuscated Bun script that exfiltrates sensitive credentials including 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. Data is exfiltrated via the GitHub API to attacker-controlled repositories following Dune-themed naming patterns.

Beyond credential theft, the malicious code establishes persistence through CI/CD workflow injection (a GitHub Actions workflow named Run Copilot that dumps all secrets), AI agent session hooks, and a system daemon named kitty-monitor. The attack was detected by Amazon Inspector and Google Open Source Security.

Indicators of compromise

Packages
  • @antv/g-plugin-canvaskit-renderer

Remediation

  • Immediately audit and revoke all credentials (AWS keys, GitHub PATs, npm tokens, GCP service accounts, Azure credentials, Kubernetes tokens, SSH keys, Docker configs, database credentials, Stripe keys, Slack tokens) that may have been exposed
  • Remove all malicious versions of @antv/g-plugin-canvaskit-renderer and any other affected packages from production environments
  • Inspect CI/CD workflows for the injected `Run Copilot` GitHub Actions workflow and remove it
  • Check for and remove the `kitty-monitor` system daemon from affected systems
  • Review git commit history and attacker-controlled repositories (Dune-themed naming patterns) for exfiltrated data
  • Update to patched versions of affected packages once available from npm maintainers
  • Monitor for unauthorized access using stolen credentials across all affected services

Sources

  1. GitHub Advisory GHSA-gcx5-qgpf-g372 · GitHub Advisory Database

Cite this entry

"Malicious code in @antv/g-plugin-canvaskit-renderer (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 26, 2026; last updated July 26, 2026. https://supplychainattack.org/incident/malicious-code-in-antv-g-plugin-canvaskit-renderer-npm-d2e3jv

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