Which versions of nebula-llm are malicious?

The following npm versions of nebula-llm are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate nebula-llm if I installed it?

nebula-llm is a typosquat — you almost certainly intended a legitimately-named package. Remove nebula-llm, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

I already installed nebula-llm — how do I know if it already compromised me?

If nebula-llm 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.

Is nebula-llm part of a known attack campaign?

Yes — nebula-llm is associated with the IN-MAL-2026-020605 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find nebula-llm across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for nebula-llm (version 1.0.0).

Malicious package

nebula-llmnpm

Advisory published Sep 28, 2026Updated Sep 28, 2026

nebula-llm is a confirmed malicious npm package (MAL-2026-17227) that typosquats a legitimate package to trick installs (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in nebula-llm (npm)

MAL-2026-17227

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall nebula-llm

What this malware does

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.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

b33da6aef41209f654f8f76cc56074a7b827599f42f941e3917326da1f4d2566

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for nebula-llm (version 1.0.0).
If you installed it — respond
nebula-llm is a typosquat — you almost certainly intended a legitimately-named package. Remove nebula-llm, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If nebula-llm 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

No. nebula-llm on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020605

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks nebula-llm-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.

Malware detection Runtime egress monitoring

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