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containedcritical

Malicious code in @antv/s2-react-components (npm)

The npm account `atool` was compromised and used to publish 631 malicious versions across 314 npm packages, including @antv/s2-react-components, in an automated 22-minute burst. 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 exfiltration 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/s2-react-componentsnpm package compromised with malicious preinstall hook

A threat actor compromised the npm account atool and published 631 malicious versions across 314 npm packages in a coordinated 22-minute attack campaign dubbed "Mini Shai-Hulud." The @antv/s2-react-components package was among those affected.

Each malicious version includes a preinstall hook that executes a 498KB obfuscated Bun script. This script uses the GitHub API as a covert exfiltration channel to steal 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. Stolen data is committed to attacker-controlled repositories following Dune-themed naming patterns.

Beyond credential theft, the malicious code 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 identified by both Amazon Inspector and Google Open Source Security, confirming the presence of malicious code in the affected packages.

Indicators of compromise

Packages
  • @antv/s2-react-components

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/s2-react-components and other affected packages from your dependency tree
  • Inspect CI/CD workflows for unauthorized `Run Copilot` workflows or other suspicious GitHub Actions
  • Check system processes for the `kitty-monitor` daemon and remove if present
  • Review git commit history for unexpected commits to attacker-controlled repositories
  • Rotate all secrets and credentials used in development and production environments
  • Update to patched versions of affected packages once available from maintainers
  • Monitor for unauthorized access to AWS, GitHub, npm, GCP, Azure, Kubernetes, Docker, and other services

Sources

  1. GitHub Advisory GHSA-fm6r-v262-pv5x · GitHub Advisory Database

Cite this entry

"Malicious code in @antv/s2-react-components (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-s2-react-components-npm-c6beaj

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