# MAL-2026-13045: Malicious code in boxy-fixture-paperclip (npm)


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

## What is MAL-2026-13045?

MAL-2026-13045 is a malicious package in boxy-fixture-paperclip, published on 5 Aug 2026. 

### Official description

On any require/import, index.js loads _adapter.js, which selects a platform-specific asset and downloads an opaque binary from a rotating set of Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev). The hostnames are reassembled at runtime via array-join to defeat static string extraction. The downloaded bytes are written to a hidden dot-file under /var/tmp (POSIX) or %TEMP% (Windows), chmod 0755'd, and executed detached via spawn('/bin/sh', ['-c',...]) or spawn('cmd',...). A DNS-TXT covert channel under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru provides a fallback that chunk-reassembles a base64 payload from TXT records when the primary hosts are unreachable. The tarball also ships lib/telemetry.js, an ~81 KB parallel dropper module masquerading as a Sentry-like analytics SDK that is not referenced in this version but duplicates the _adapter.js payload-staging shape. Installing or importing this package results in execution of attacker-controlled code on the installer's machine.

## What should I do about MAL-2026-13045?

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-2026-13045 is a malicious package: boxy-fixture-paperclip (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-2026-13045/ (Markdown: https://insights.sbomify.com/MAL-2026-13045/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13045

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13045/
Summaries are generated and may contain mistakes; the official description above is the record.