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containedcritical

Malicious code in @antv/f6-wx (npm)

The npm account `atool` was compromised and used to publish 631 malicious versions across 314 packages, including @antv/f6-wx. Each version injects a preinstall hook executing an obfuscated Bun script that exfiltrates credentials via the GitHub API and establishes persistence through 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
Account takeoverCompromised package
Threat actor
TeamPCPMini Shai Hulud
Affected entities
  • @antv/f6-wxMalicious 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. The @antv/f6-wx package was among those affected.

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. Stolen data is committed to attacker-controlled repositories following Dune-themed naming patterns (e.g., harkonnen-melange-742).

The attack establishes 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. This campaign is attributed to the TeamPCP threat actor and is part of the "Mini Shai-Hulud is back" worm.

Indicators of compromise

Packages
  • @antv/f6-wx

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 all malicious versions of affected packages from npm; audit package.json for @antv/f6-wx and other packages from the `atool` account
  • Audit CI/CD workflows for unauthorized `Run Copilot` workflow or similar suspicious workflows; remove any injected workflows
  • Search systems for the `kitty-monitor` daemon and remove it
  • Review git commit history for suspicious commits to attacker-controlled repositories with Dune-themed names
  • Implement npm package signing verification and consider using npm audit to detect compromised dependencies
  • Monitor for unauthorized access to repositories and CI/CD systems

Sources

  1. GitHub Advisory GHSA-g643-x2wj-c398 · GitHub Advisory Database

Cite this entry

"Malicious code in @antv/f6-wx (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-f6-wx-npm-54brav

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