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containedcritical

Malware in userbotjs-jun

The npm package userbotjs-jun was found to contain malware, potentially providing full system compromise to attackers. Any computer with this package installed or running should be considered fully compromised and all secrets and keys rotated immediately from a different machine.

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Last updated
Blast radius
Any system with the package installed or running
Ecosystems
Attack vectors
Affected entities
  • userbotjs-junnpm package containing malware

The npm package userbotjs-jun was identified as containing malware. According to the GitHub advisory, any computer that has this package installed or running should be considered fully compromised.\n\nThe advisory recommends that all secrets and keys stored on affected computers be rotated immediately from a different, uncompromised computer. While the malicious package should be removed, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the initial compromise, given that the attacker may have gained full control of the system.\n\nAffected users should treat any system that ran this package as potentially fully compromised and take appropriate incident response measures.

Indicators of compromise

Packages
  • userbotjs-jun

Remediation

  • Immediately remove the userbotjs-jun package from all systems
  • Rotate all secrets, API keys, and credentials from a different, uncompromised computer
  • Treat any computer that had this package installed as fully compromised and perform forensic analysis
  • Review system logs and network traffic for signs of unauthorized access or data exfiltration
  • Consider full system reimaging or replacement if the package was installed on production systems

Sources

  1. GitHub Advisory GHSA-hvvr-852c-qpw8 · GitHub Advisory Database

Cite this entry

"Malware in userbotjs-jun." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 17, 2026; last updated August 17, 2026. https://supplychainattack.org/incident/malware-in-userbotjs-jun-3t06wz

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