Malicious code in @antv/f2-wordcloud (npm)
The npm account `atool` was compromised and used to publish 631 malicious versions across 314 npm packages, including @antv/f2-wordcloud, in a 22-minute automated 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.
- 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
- Attack vectors
- Threat actor
- Affected entities
- @antv/f2-wordcloudPart of Mini Shai-Hulud campaign affecting 314 packages
A threat actor compromised the npm account atool and launched the "Mini Shai-Hulud" supply chain attack campaign, publishing 631 malicious versions across 314 npm packages in an automated 22-minute burst. The @antv/f2-wordcloud package was among those compromised.
Each malicious version injects a preinstall hook that executes a 498KB obfuscated Bun script. The 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.
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. Stolen data is committed to attacker-controlled repositories following Dune-themed naming patterns (e.g., harkonnen-melange-742).
The incident was identified by multiple security sources including Amazon Inspector and Google Open Source Security, confirming the package's compromise as part of the ongoing "Mini Shai-Hulud is back" worm campaign.
Indicators of compromise
- Packages
- @antv/f2-wordcloud
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/f2-wordcloud and other affected packages from your dependency tree
- Inspect CI/CD workflows for unauthorized `Run Copilot` workflows or other suspicious workflow modifications
- Check system processes for the `kitty-monitor` daemon and remove if present
- Review git commit history for unexpected commits to attacker-controlled repositories with Dune-themed names
- Upgrade to patched versions of affected packages once available
- Implement package signature verification and integrity checks in your supply chain
- Monitor npm account activity and enable multi-factor authentication on all npm accounts
Sources
- GitHub Advisory GHSA-3hvp-cf8c-5w96 · GitHub Advisory Database
Cite this entry
"Malicious code in @antv/f2-wordcloud (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-f2-wordcloud-npm-7yzm93
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