# MAL-2026-13120: Malicious code in bpm-foundation-tcs-configs (npm)


- **Type:** Malicious package
- **Package:** `bpm-foundation-tcs-configs` (npm)
- **Published:** 5 Aug 2026

## What is MAL-2026-13120?

MAL-2026-13120 is a malicious package in bpm-foundation-tcs-configs, published on 5 Aug 2026. 

### Official description

On require() of the package, index.js loads _adapter.js which downloads a platform-specific executable from obfuscated Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) and *.dl.wel1.ru, writes it to /tmp or %TEMP% under disguised names (.cache_<hex>,.analytics_state, dotnet_diag_<hex>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe start /b. Destination hostnames are reconstructed at runtime by splitting the domain into fragments and joining them with.join('') to defeat static URL scanners, and code comments falsely label the behavior as telemetry/CDN negotiation. A DNS-over-TXT fallback channel reassembles a base64 payload from numbered TXT records when HTTP fetch fails. There is no version pin or hash verification on the downloaded binary, a TTL cache suppresses repeat downloads to reduce detection, and DISABLE_TELEMETRY-style environment variables act as an evasion switch. The dropped filenames impersonate system components (dotnet diagnostics, analytics cache).

## What should I do about MAL-2026-13120?

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-2026-13120 is a malicious package: bpm-foundation-tcs-configs (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-2026-13120/ (Markdown: https://insights.sbomify.com/MAL-2026-13120/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13120

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13120/
Summaries are generated and may contain mistakes; the official description above is the record.