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containedcritical

Malicious code in @antv/gi-assets-algorithm (npm)

The npm account `atool` was compromised and used to publish 631 malicious versions across 314 npm packages, including @antv/gi-assets-algorithm, in an automated 22-minute attack. 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
npmOther
Attack vectors
Account takeoverCompromised packageMalicious commit
Threat actor
Mini Shai Hulud
Affected entities
  • @antv/gi-assets-algorithmnpm package compromised with malicious preinstall hook

A threat actor compromised the npm account atool and executed a large-scale supply chain attack dubbed "Mini Shai-Hulud," publishing 631 malicious versions across 314 npm packages in a rapid 22-minute burst. The @antv/gi-assets-algorithm package was among those compromised.

Each malicious version includes a preinstall hook that executes a 498KB obfuscated Bun script. This script 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. Exfiltration occurs via the GitHub API to attacker-controlled repositories following Dune-themed naming patterns (e.g., harkonnen-melange-742).

Beyond credential theft, the malicious payload establishes persistence through multiple mechanisms: CI/CD workflow injection (a GitHub Actions workflow named Run Copilot that dumps all secrets via toJSON(secrets)), AI agent session hooks, and a system daemon named kitty-monitor.

The incident was detected and reported by Amazon Inspector and Google Open Source Security, indicating the attack has been identified and contained.

Indicators of compromise

Packages
  • @antv/gi-assets-algorithm

Remediation

  • Immediately revoke all credentials (AWS keys, GitHub PATs, npm tokens, GCP service accounts, Azure credentials, Kubernetes tokens, SSH keys, Docker auth configs, database credentials, Stripe keys, Slack tokens) that may have been exposed
  • Remove or downgrade @antv/gi-assets-algorithm to a known-clean version prior to the compromise
  • Audit npm account `atool` and all packages it maintains for additional malicious versions
  • Review CI/CD workflows and GitHub Actions for unauthorized `Run Copilot` workflows or other suspicious automation
  • Scan systems for the `kitty-monitor` daemon and remove if present
  • Monitor for unauthorized access to exfiltrated credentials and services
  • Implement npm package verification and integrity checks in build pipelines
  • Enable 2FA and review access controls on npm accounts and GitHub repositories

Sources

  1. GitHub Advisory GHSA-4cw9-4w5q-cv9v · GitHub Advisory Database

Cite this entry

"Malicious code in @antv/gi-assets-algorithm (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 27, 2026; last updated July 27, 2026. https://supplychainattack.org/incident/malicious-code-in-antv-gi-assets-algorithm-npm-11j2zd

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