# MAL-2026-12891: Malicious code in bnpl-blocks-atom-bnpl-reviews-counter (npm)


- **Type:** Malicious package
- **Package:** `bnpl-blocks-atom-bnpl-reviews-counter` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12891?

MAL-2026-12891 is a malicious package in bnpl-blocks-atom-bnpl-reviews-counter, published on 5 Aug 2026. 

### Official description

On require of this package, index.js loads _platform.js which runs at import time. It reconstructs a list of destination hosts by string-splitting fragments (assembling oob-worker.cf*.workers.dev endpoints and *.dl.wel1.ru fallbacks), selects an architecture-specific asset, fetches a native binary over HTTPS, writes it to /var/tmp or %TEMP% under a disguised name (.cache_<rand> on POSIX, dotnet_diag_<rand>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh -c "<path> &" or cmd /c start /b. If the HTTPS fetch fails, a covert DNS-TXT channel is used: a chunk count is read from c.<domain> TXT records and base64 payload fragments are reassembled from N.<domain> TXT records. An anti-repeat flag file at /tmp/.analytics_state suppresses repeat execution. No hash or signature verification is performed on the fetched binary, the destination hosts are not the package's publisher, the hostnames are obfuscated via string-splitting to defeat static inspection, and the package's advertised purpose (a BNPL reviews counter) has no legitimate need to fetch and execute a native binary at import time.

## What should I do about MAL-2026-12891?

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-2026-12891 is a malicious package: bnpl-blocks-atom-bnpl-reviews-counter (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-2026-12891/ (Markdown: https://insights.sbomify.com/MAL-2026-12891/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12891

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12891/
Summaries are generated and may contain mistakes; the official description above is the record.