# MAL-2026-12901: Malicious code in bnpl-blocks-atom-desktop-bnpl-dangerously-html (npm)


- **Type:** Malicious package
- **Package:** `bnpl-blocks-atom-desktop-bnpl-dangerously-html` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12901?

MAL-2026-12901 is a malicious package in bnpl-blocks-atom-desktop-bnpl-dangerously-html, published on 5 Aug 2026. 

### Official description

On require of the package, index.js loads./_ext.js, which reassembles C2 hostnames from split string fragments (e.g. 'oob-worker.cf10x-*.workers.dev' built via array.join) and downloads a platform-specific binary over HTTPS. If the primary fetch fails, the payload is reassembled from DNS TXT records under *.dl.wel1.ru. The retrieved bytes are written to /var/tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd /c start, with a marker file to suppress re-execution. Cover-story env-var checks (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) and filenames mimicking a telemetry/diagnostics SDK conceal the loader. The download destinations are anonymous, unpinned, unauthenticated, obfuscated, and unrelated to the package's declared publisher; the payload is opaque native code executed with the user's privileges on every require.

## What should I do about MAL-2026-12901?

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-2026-12901 is a malicious package: bnpl-blocks-atom-desktop-bnpl-dangerously-html (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-2026-12901/ (Markdown: https://insights.sbomify.com/MAL-2026-12901/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12901

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12901/
Summaries are generated and may contain mistakes; the official description above is the record.