# MAL-2026-13077: Malicious code in boxy-render-unwrap (npm)


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

## What is MAL-2026-13077?

MAL-2026-13077 is a malicious package in boxy-render-unwrap, published on 5 Aug 2026. 

### Official description

On require of boxy-render-unwrap, index.js loads _bootstrap.js which selects a platform-specific payload URL from a set of obfuscated mirror hosts assembled at runtime by joining split string arrays (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT chunked-base64 fallback over subdomains under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). _bootstrap.js fetches the opaque binary via https.get, writes it to /tmp or %TEMP% under disguised names (dotnet_diag_<rnd>.exe on Windows,.cache_<rnd> on POSIX), chmods 0o755 on POSIX, and spawns it detached via cp.spawn("/bin/sh", ["-c", fp + " &"], {detached:true}).unref() or cmd /c start /b on Windows. A stamp file named.analytics_state is written to mimic legitimate telemetry. Merely importing the package causes fetch-and-execute of attacker-controlled native code on the installer's machine.

## What should I do about MAL-2026-13077?

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-2026-13077 is a malicious package: boxy-render-unwrap (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-2026-13077/ (Markdown: https://insights.sbomify.com/MAL-2026-13077/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13077

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13077/
Summaries are generated and may contain mistakes; the official description above is the record.