# MAL-2026-13067: Malicious code in boxy-micro-story (npm)


- **Type:** Malicious package
- **Package:** `boxy-micro-story` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13067?

MAL-2026-13067 is a malicious package in boxy-micro-story, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _platform.js which auto-executes an init() routine that selects a platform-specific payload, fetches an opaque binary over HTTPS from hardcoded Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT fallback under dl.wel1.ru, writes it to /var/tmp or %TEMP% under a hidden/obfuscated filename (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Destination hostnames are reconstructed via array-join to defeat static string search, and a fake telemetry opt-out cover (DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK, cache marker named 'analytics_state') disguises the dropper as diagnostics. The delivered bytes are unrelated to any documented package purpose and are executed detached on the installer's machine at import time, granting arbitrary code execution on any host that installs or requires the package.

## What should I do about MAL-2026-13067?

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-2026-13067 is a malicious package: boxy-micro-story (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-2026-13067/ (Markdown: https://insights.sbomify.com/MAL-2026-13067/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13067

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13067/
Summaries are generated and may contain mistakes; the official description above is the record.