Malware in @gocortexio/npmgremlinbox-simpl-2-0
The npm package @gocortexio/npmgremlinbox-simpl-2-0 contained malware that grants full system compromise to attackers. Systems with this package installed should be considered fully compromised and all credentials rotated immediately.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- @gocortexio/npmgremlinbox-simpl-2-0
A malicious npm package, @gocortexio/npmgremlinbox-simpl-2-0, was identified as containing malware. The package grants attackers full control of any computer on which it is installed or running.\n\nAffected systems should be treated as fully compromised. All secrets, keys, and credentials stored on affected computers must be rotated immediately from a different, uncompromised system. While the package should be removed, complete removal of all malicious artifacts cannot be guaranteed due to the level of system access the malware obtained.\n\nThe advisory was published on 2026-07-20 via GitHub Security Advisory GHSA-r8xp-4267-6m36.
Indicators of compromise
- Packages
- @gocortexio/npmgremlinbox-simpl-2-0
Remediation
- Immediately remove the @gocortexio/npmgremlinbox-simpl-2-0 package from all systems
- Rotate all secrets, API keys, credentials, and tokens from a different, uncompromised computer
- Assume full system compromise and conduct forensic analysis or rebuild affected systems
- Audit all access logs and activity on affected systems for signs of unauthorized access or data exfiltration
- Monitor for any lateral movement or secondary compromises from affected systems
Sources
- GitHub Advisory GHSA-r8xp-4267-6m36 · GitHub Advisory Database
Cite this entry
"Malware in @gocortexio/npmgremlinbox-simpl-2-0." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-gocortexio-npmgremlinbox-simpl-2-0-0jgyxs
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