# MAL-2026-18297: Malicious code in nebulallm (PyPI)


- **Type:** Malicious package
- **Package:** `nebulallm` (PyPI)
- **Published:** 25 Oct 2026

## What is MAL-2026-18297?

MAL-2026-18297 is a malicious package in nebulallm, published on 25 Oct 2026. 

### Official description

nebulallm 1.4.3 presents itself as an AI API client stub but ships a custom install command class in setup.py that executes on `pip install`. The install hook spawns regsvr32.exe with the squiblydoo LOLBin pattern (`regsvr32 -s -i:<url> scrobj.dll`) to fetch and execute a remote COM scriptlet from https://akinomoreno.pythonanywhere.com/faye on the installer's Windows host. The subprocess is launched with DETACHED_PROCESS and stdin/stdout/stderr redirected to DEVNULL, so the dropper runs silently and produces no output during pip install. The declared package functionality is unrelated to the install-time behavior, consistent with a dropper staged behind a cover-story package.

During installation package first downloads a JScript script, which then downloads the next malicious DLL.

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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-10-nebulallm

Reasons (based on the campaign):

 - typosquatting

 - The package overrides the install command in setup.py to execute malicious code during installation.

 - Downloads and executes a remote executable.

 - Downloads and executes a remote malicious script.

 - malware

## What should I do about MAL-2026-18297?

Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.

## Fix prompt for AI coding agents

```text
MAL-2026-18297 is a malicious package: nebulallm (PyPI). Every version was published to cause harm.

Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.

Reference: https://insights.sbomify.com/MAL-2026-18297/ (Markdown: https://insights.sbomify.com/MAL-2026-18297/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-18297

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-18297/
Summaries are generated and may contain mistakes; the official description above is the record.