MAL-2026-17227

    Dashboard / Malicious Package / MAL-2026-17227

    MAL-2026-17227

    Published: 28 Sept 2026Last Modified: 28 Sept 2026

    Summary: Malicious code in nebula-llm (npm)

    Details: Source: amazon-inspector (b33da6aef41209f654f8f76cc56074a7b827599f42f941e3917326da1f4d2566) The npm package [email protected] ships a preinstall lifecycle script (preinstall.cjs) that embeds a ~257KB Windows PE binary as a base64+zlib-compressed string literal. On `npm install` on Windows, the script decompresses the blob, writes it to %LOCALAPPDATA%\Microsoft\Conhost\conhost.exe — impersonating the legitimate Windows Console Host binary — and spawns it detached with stdio ignored and windowsHide:true, then unrefs the child so it survives the install process. The decoded PE contains a.kntrat section and references github.com/syskiel/kntrat-e and IP 65.87.7.132, consistent with a persistent remote-access implant. Installation therefore executes an opaque author-supplied executable on the installer's host with no user interaction and no purpose related to any documented package function.

    References: https://www.npmjs.com/package/nebula-llm/v/1.0.0

    Affected packages

    Package

    Name: nebula-llm

    Purl: pkg:npm/nebula-llm

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    1.0.0