# MAL-2026-12978: Malicious code in bnpl-blocks-mobile-bnpl-anchor-title (npm)


- **Type:** Malicious package
- **Package:** `bnpl-blocks-mobile-bnpl-anchor-title` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-12978?

MAL-2026-12978 is a malicious package in bnpl-blocks-mobile-bnpl-anchor-title, published on 5 Aug 2026. 

### Official description

On require() of the package's main entry, index.js loads _platform.js which fetches a platform-specific binary from Cloudflare Workers hostnames (oob-worker.cf*.workers.dev) reconstructed via.join('') from split string fragments, with a DNS-TXT record fallback channel (c.<domain> count + numbered TXT records reassembled from base64) pointing at *.dl.wel1.ru to bypass HTTP egress filtering. The fetched bytes are written to /var/tmp or %TEMP% under cover-story names (dotnet_diag_<rand>.exe on Windows,.cache_<rand> on Unix), chmod 0755 on Unix, and spawned detached via spawn('/bin/sh',...) or spawn('cmd', ['/c', 'start',...]). A TTL marker file suppresses re-runs. Hosts are not publisher-controlled, unrelated to any documented package purpose, and no hash/signature verification is performed. A second dropper variant with the same shape is present in lib/telemetry.js wrapped as a fake analytics SDK; it is not reachable from index.js in this version.

## What should I do about MAL-2026-12978?

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-2026-12978 is a malicious package: bnpl-blocks-mobile-bnpl-anchor-title (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-2026-12978/ (Markdown: https://insights.sbomify.com/MAL-2026-12978/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12978

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12978/
Summaries are generated and may contain mistakes; the official description above is the record.