Malicious code in nemo-jaws (npm)
The npm package 'nemo-jaws' contains malicious code that executes during installation. Its preinstall script collects various host system identifiers and sends them to an external attacker-controlled server. Systems with this package installed should be considered fully compromised, and all secrets and keys on those systems should be rotated immediately. Removal of the package does not guarantee complete remediation due to potential persistent compromise.
AI Analysis
Technical Summary
The 'nemo-jaws' npm package, specifically versions 3.99.99, 99.99.9, 28.0.0, and 25.0.0, contains a malicious preinstall hook that executes 'index.js'. This script gathers host information including hostname, platform, architecture, home directory, and DNS servers, then transmits this data via HTTP POST to a hardcoded Burp Collaborator subdomain controlled by an external party. This behavior indicates a supply chain compromise with potential full system compromise upon installation.
Potential Impact
Any system that installs or runs the affected versions of the 'nemo-jaws' package is considered fully compromised. Sensitive information such as system identifiers is exfiltrated to an attacker-controlled endpoint. The compromise may allow attackers to gain persistent control, making all stored secrets and keys on the affected system potentially exposed and requiring immediate rotation from a secure environment.
Mitigation Recommendations
Immediate removal of the 'nemo-jaws' package is recommended. However, due to the likelihood of full system compromise, all secrets and keys stored on the affected system should be rotated from a different, trusted machine. Comprehensive incident response and forensic analysis should be conducted to identify and remediate any persistent malicious presence. Patch status is not applicable as this is a malicious package rather than a vulnerability with an official fix.
Malicious code in nemo-jaws (npm)
Description
The npm package 'nemo-jaws' contains malicious code that executes during installation. Its preinstall script collects various host system identifiers and sends them to an external attacker-controlled server. Systems with this package installed should be considered fully compromised, and all secrets and keys on those systems should be rotated immediately. Removal of the package does not guarantee complete remediation due to potential persistent compromise.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The 'nemo-jaws' npm package, specifically versions 3.99.99, 99.99.9, 28.0.0, and 25.0.0, contains a malicious preinstall hook that executes 'index.js'. This script gathers host information including hostname, platform, architecture, home directory, and DNS servers, then transmits this data via HTTP POST to a hardcoded Burp Collaborator subdomain controlled by an external party. This behavior indicates a supply chain compromise with potential full system compromise upon installation.
Potential Impact
Any system that installs or runs the affected versions of the 'nemo-jaws' package is considered fully compromised. Sensitive information such as system identifiers is exfiltrated to an attacker-controlled endpoint. The compromise may allow attackers to gain persistent control, making all stored secrets and keys on the affected system potentially exposed and requiring immediate rotation from a secure environment.
Defensive Guidance
Immediate removal of the 'nemo-jaws' package is recommended. However, due to the likelihood of full system compromise, all secrets and keys stored on the affected system should be rotated from a different, trusted machine. Comprehensive incident response and forensic analysis should be conducted to identify and remediate any persistent malicious presence. Patch status is not applicable as this is a malicious package rather than a vulnerability with an official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-2785
- Osv Schema Version
- 1.7.4
- Aliases
- ["GHSA-w22h-mv8v-hqhc"]
- Ecosystems
- ["npm"]
Threat ID: 6a96f318acd9273b49e4956f
Added to database: 09/01/2026, 15:45:28 UTC
Last enriched: 09/08/2026, 11:23:43 UTC
Last updated: 09/08/2026, 11:23:43 UTC
Views: 4
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