openllmapi@4.0.2
Malicious code in openllmapi (npm)
T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1059.003 · Windows Command ShellT1218.005 · MshtaT1105 · Ingress Tool Transfer
Analysis
Package openllmapi@4.0.2 is a trojanized impersonation of an LLM API client. During npm install, its preinstall hook executes mshta.exe with a remote URL (hxxp://fixars[.]top), causing Windows systems to silently download and execute an arbitrary HTA payload from that domain. The main source file is a decoy boilerplate API client; the malicious behaviour is in the preinstall script only.
- analyzed by
- Leitwacht
- first seen
- Jun 24, 2026, 02:11 AM
- analyzed
- Jun 24, 2026, 02:11 AM
Related advisories
- easyllmai@3.0.1
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- textify-kit@1.0.0
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- optional-cpu-features@1.0.3
- @ethers-js/contracts@6.9.0
- sme-rko-finance-front-operations-domain@35.8.1
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.