# MAL-2026-13661: Malicious code in sme-rko-finance-front-payments-feed-adapter (npm)


- **Type:** Malicious package
- **Package:** `sme-rko-finance-front-payments-feed-adapter` (npm)
- **Published:** 8 Aug 2026

## What is MAL-2026-13661?

MAL-2026-13661 is a malicious package in sme-rko-finance-front-payments-feed-adapter, published on 8 Aug 2026. 

### Official description

The package is advertised as a finance/payments adapter but on require() reaches a staged loader. `_adapter.js` reconstructs destination hostnames from split array literals (e.g., `['oob-worker.','cf101-adf.workers.d','ev'].join('')`) to hide `oob-worker.cf101-adf.workers.dev`, `oob-worker.cf103-070.workers.dev`, `oob-worker.cf100-416.workers.dev`, and `oob-worker.cf99-9b3.workers.dev`, with a DNS TXT chunked-fallback channel to `sdk.dl.wel1.ru`, `ext.dl.wel1.ru`, `pkg.dl.wel1.ru`, and `net.dl.wel1.ru`. A platform-specific asset (`/pkg/package`, `/pkg/package.exe`, or `/pkg/package_mac`) is downloaded, written to `/var/tmp/.cache_<hex>` or Windows TEMP `dotnet_diag_<hex>.exe` to masquerade as a system diagnostic, chmod 0755, and spawned detached via `cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}).unref()`. A stamp file gates re-runs. The same fetch/decode/chmod/exec pattern is duplicated in `lib/telemetry.js` — the module exposed as `index.js`'s public API — using `require('child_' + 'process')`, `Buffer.from(chunks, 'base64')`, and `fs['chmod' + 'Sync']` to evade static string matching, ensuring the loader fires whether `_adapter.js` or `telemetry.js` is loaded first. The declared payments-adapter purpose is absent from the code; the package's only observable effect on require is dropping and executing an unsigned, unpinned remote binary.

## What should I do about MAL-2026-13661?

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-2026-13661 is a malicious package: sme-rko-finance-front-payments-feed-adapter (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-2026-13661/ (Markdown: https://insights.sbomify.com/MAL-2026-13661/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-13661

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-13661/
Summaries are generated and may contain mistakes; the official description above is the record.