# MAL-2026-12253: Malicious code in tinkoff-statist-browser-typed-client-art.apps.reporegistry (npm)


- **Type:** Malicious package
- **Package:** `tinkoff-statist-browser-typed-client-art.apps.reporegistry` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-3h58-7m84-65h5

## What is MAL-2026-12253?

MAL-2026-12253 is a malicious package in tinkoff-statist-browser-typed-client-art.apps.reporegistry, published on 5 Aug 2026. 

### Official description

On require of the package, _adapter.js executes a top-level bootstrap that downloads a platform-specific binary from hardcoded Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, cf99-9b3.workers.dev, cf101-adf.workers.dev, cf102-baf.workers.dev) with DNS-TXT fallback to tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The destination hostnames and the child_process module name are assembled at runtime via array.join to evade static inspection. The fetched bytes are written to /var/tmp/.cache_<rand> on Unix or %TEMP%\dotnet_diag_<rand>.exe on Windows, chmod'd to 0755, and detach-spawned via /bin/sh -c or cmd /c start. A second module, lib/telemetry.js, contains the same dropper pattern (base64 chunk assembly, string-concatenated fs.chmodSync, cp.spawn('/bin/sh', ['-c', filePath + ' &'], {detached:true})) as a staged/redundant payload. Package naming and the analytics-SDK framing do not match the observed behavior, which is a runtime fetch-and-execute of attacker-controlled bytes on the installer's host.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

## What should I do about MAL-2026-12253?

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-2026-12253 is a malicious package: tinkoff-statist-browser-typed-client-art.apps.reporegistry (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-2026-12253/ (Markdown: https://insights.sbomify.com/MAL-2026-12253/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12253

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12253/
Summaries are generated and may contain mistakes; the official description above is the record.