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containedcritical

Malicious code in mcp-echarts (npm)

The npm account `atool` was compromised and used to publish 631 malicious versions across 314 npm packages, including mcp-echarts, 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
Affected entities
  • mcp-echartsnpm package compromised with malicious preinstall hook

The npm account atool was compromised as part of the "Mini Shai-Hulud" supply chain attack campaign attributed to the TeamPCP threat actor. In a single 22-minute automated burst, the attacker published 631 malicious versions across 314 npm packages, including mcp-echarts.

Each malicious version contains 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 mcp-echarts package specifically was modified to include the malicious preinstall hook executing the obfuscated payload. The incident was identified by Amazon Inspector and Google Open Source Security.

Indicators of compromise

Packages
  • mcp-echarts

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 audit all GitHub Actions workflows, particularly any named 'Run Copilot' or similar, for unauthorized secret exfiltration
  • Audit and remove any system daemons named 'kitty-monitor' or similar persistence mechanisms
  • Uninstall or downgrade mcp-echarts and all 314 affected packages to versions prior to the malicious publication
  • Review npm account security for the `atool` account and all related accounts for unauthorized access
  • Scan systems for the obfuscated Bun script payload and associated artifacts
  • Monitor for unauthorized access to exfiltrated credentials and implement alerting on their use

Sources

  1. GitHub Advisory GHSA-33m7-5xmx-p58p · GitHub Advisory Database

Cite this entry

"Malicious code in mcp-echarts (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 27, 2026; last updated July 28, 2026. https://supplychainattack.org/incident/malicious-code-in-mcp-echarts-npm-4lkhwg

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