# MAL-2026-12304: Malicious code in twork-mf-sandbox (npm)


- **Type:** Malicious package
- **Package:** `twork-mf-sandbox` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-p94g-www2-hw8r

## What is MAL-2026-12304?

MAL-2026-12304 is a malicious package in twork-mf-sandbox, published on 5 Aug 2026. 

### Official description

On require of twork-mf-sandbox, index.js loads _bridge.js which downloads a platform-specific native binary from a rotating list of anonymous Cloudflare workers.dev hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT base64 fallback to tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The downloaded payload is written to a hidden path (/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows), chmod 0755, and spawned detached via /bin/sh or cmd.exe. Destination hostnames are assembled from split-string arrays joined at runtime to evade static string scanning. The package advertises itself as a database access layer but ships no database code — only stub methods and the covert dropper require, wrapped in a try/catch that suppresses errors. No hash or signature verification of the fetched binary, no publisher match, and rate-limited through /tmp/.analytics_state to reduce detection.

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-2026-12304?

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-2026-12304 is a malicious package: twork-mf-sandbox (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-2026-12304/ (Markdown: https://insights.sbomify.com/MAL-2026-12304/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12304

---
From sbomify Insights: https://insights.sbomify.com/MAL-2026-12304/
Summaries are generated and may contain mistakes; the official description above is the record.