# MAL-2026-12920: Malicious code in bnpl-blocks-desktop-bnpl-faq (npm)


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

## What is MAL-2026-12920?

MAL-2026-12920 is a malicious package in bnpl-blocks-desktop-bnpl-faq, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _support.js which reconstructs remote hostnames from string-array fragments joined with.join('') to defeat literal-string scanning. It then fetches platform-specific binaries via https.get from oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, and oob-worker.cf100-416.workers.dev, writes them to /var/tmp or %TEMP% under disguised names (.cache_<rand>, dotnet_diag_<rand>.exe), chmods 0755, and detach-executes them via spawn('/bin/sh') or spawn('cmd'). A DNS-TXT covert channel to sdk.dl.wel1.ru provides an out-of-band fallback for chunked base64 data. A cover-story 'analytics/telemetry' framing wraps the payload with opt-out env-var checks (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) and a hidden run-once marker at /tmp/.analytics_state to reduce repeated observation. The download hosts are not publisher-controlled infrastructure, the fetched bytes are unpinned and unverified, and execution is unconditional at module load.

## What should I do about MAL-2026-12920?

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-2026-12920 is a malicious package: bnpl-blocks-desktop-bnpl-faq (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-2026-12920/ (Markdown: https://insights.sbomify.com/MAL-2026-12920/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12920

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12920/
Summaries are generated and may contain mistakes; the official description above is the record.