Malicious code in @antv/g-pattern (npm)
A threat actor compromised the npm account `atool` and published 631 malicious versions across 314 npm packages, including @antv/g-pattern, 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 theft affecting AWS, GitHub, npm, GCP, Azure, Kubernetes, SSH, Docker, databases, Stripe, and Slack
- Attack vectors
- Threat actor
- Affected entities
- @antv/g-patternMalicious preinstall hook injected; part of Mini Shai-Hulud campaign
As part of the "Mini Shai-Hulud" supply chain attack campaign, a threat actor compromised the npm account atool and published 631 malicious versions across 314 npm packages in an automated 22-minute burst. The @antv/g-pattern package was among those affected, modified to include a malicious preinstall hook.
Each malicious version executes a 498KB obfuscated Bun script that uses the GitHub API as a covert exfiltration channel. The script steals a broad range of 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 credentials are committed to attacker-controlled repositories following Dune-themed naming patterns (e.g., harkonnen-melange-742).
Beyond credential theft, the malicious packages establish 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 multi-layered persistence approach suggests intent for long-term access and continued data exfiltration.
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/g-pattern
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/g-pattern and other affected packages from npm; update to patched versions if available
- Inspect CI/CD workflows for unauthorized `Run Copilot` or similar workflows and remove them
- Check system processes for the `kitty-monitor` daemon and remove if present
- Review git commit history for suspicious commits to attacker-controlled repositories with Dune-themed names
- Implement npm package pinning and integrity verification to prevent installation of malicious versions
- Enable 2FA on npm and GitHub accounts to prevent account takeover
- Monitor for unauthorized access to exfiltrated credentials and rotate all secrets
Sources
- GitHub Advisory GHSA-6vp6-xhxc-hjcf · GitHub Advisory Database
Cite this entry
"Malicious code in @antv/g-pattern (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-g-pattern-npm-694p93
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