# MAL-2026-13534: Malicious code in ded-pwa-c-boxy-di (npm)


- **Type:** Malicious package
- **Package:** `ded-pwa-c-boxy-di` (npm)
- **Published:** 7 Aug 2026

## What is MAL-2026-13534?

MAL-2026-13534 is a malicious package in ded-pwa-c-boxy-di, published on 7 Aug 2026. 

### Official description

On require('ded-pwa-c-boxy-di'), index.js loads _loader.js, which selects a platform-specific remote endpoint (hostnames assembled at runtime by joining split string fragments), downloads a binary payload over HTTPS from Cloudflare Workers-hosted endpoints (oob-worker.cf100-416.workers.dev and siblings) with a DNS-TXT base64 fallback channel via sdk.dl.wel1.ru, writes the bytes to a temporary path under a disguised name (e.g. dotnet_diag_*.exe,.cache_*), chmods the file to 0755, and spawns it detached via /bin/sh -c or cmd. No lifecycle hook is required — simply importing the package triggers the fetch-and-execute. Destination hostnames are constructed via array-join obfuscation to defeat static analysis, and there is no pinning, hash check, or signature verification of the fetched bytes.

## What should I do about MAL-2026-13534?

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-2026-13534 is a malicious package: ded-pwa-c-boxy-di (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-2026-13534/ (Markdown: https://insights.sbomify.com/MAL-2026-13534/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13534

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13534/
Summaries are generated and may contain mistakes; the official description above is the record.