registry / nebula-llm / 1.0.0

nebula-llm@1.0.0

OSV Malicious Advisory

imported 11d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-17227 confirms this npm version as malicious. The npm package nebula-llm@1.0.0 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...

Advisory

MAL-2026-17227

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in nebula-llm (npm)

Details

The npm package nebula-llm@1.0.0 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.

Decision reason

OpenSSF Malicious Packages via OSV confirms nebula-llm@1.0.0 as malicious (MAL-2026-17227): Malicious code in nebula-llm (npm)

References

OSV advisory PACKAGE

Source & flagged code

0 flagged

No flagged code excerpts are attached to this scan.

Source & flagged code

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Findings

1 High

HighOsv Malicious Advisory

Affected versions and remediation

This report applies to nebula-llm@1.0.0.

See version security history for other recorded verdicts.

Avoid installing nebula-llm@1.0.0. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-09-28 18:30:05.546Z (UTC).

Source advisory published: 2026-09-28 18:07:36.000Z (UTC).

This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.