# MAL-2026-17624: Malicious code in documenclient (npm)


- **Type:** Malicious package
- **Package:** `documenclient` (npm)
- **Published:** 5 Oct 2026
- **Also known as:** GHSA-648r-w4vm-vvvp

## What is MAL-2026-17624?

MAL-2026-17624 is a malicious package in documenclient, published on 5 Oct 2026. 

### Official description

documenclient@1.0.5 publishes an npm package whose only shipped content is a heavily obfuscated PowerShell script embedded in the README. The script hides its console window via ShowWindow(hWnd, 0), positions the window off-screen at (-32000, -32000) via SetWindowPos, sleeps a randomized interval, concatenates ~140 string fragments into a base64 blob, XOR-decodes it with key 89, and executes the resulting payload via reflective [ScriptBlock]::Create invocation assembled from char-code type and method names. The declared main (index.js) is absent and files is empty, so the artifact has no legitimate JavaScript functionality — the dropper script is the entire payload. Console hiding, off-screen window placement, randomized sleep jitter, dynamic type/method resolution, and XOR+base64 layering have no legitimate purpose in an npm README and are canonical dropper and anti-analysis techniques. The decoded payload is not inspectable from the obfuscated form shipped, so the final behavior on a Windows host executing the script is unknown but attacker-controlled.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-17624?

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-2026-17624 is a malicious package: documenclient (npm). 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-2026-17624/ (Markdown: https://insights.sbomify.com/MAL-2026-17624/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-17624

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-17624/
Summaries are generated and may contain mistakes; the official description above is the record.