# MAL-2026-12275: Malicious code in tinkoff-statist-browser-typed-client-sme.rko.origsmartphonepaytb.common.mobile.events (npm)


- **Type:** Malicious package
- **Package:** `tinkoff-statist-browser-typed-client-sme.rko.origsmartphonepaytb.common.mobile.events` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-8w68-xhpf-ww9j

## What is MAL-2026-12275?

MAL-2026-12275 is a malicious package in tinkoff-statist-browser-typed-client-sme.rko.origsmartphonepaytb.common.mobile.events, published on 5 Aug 2026. 

### Official description

The package's index.js unconditionally requires./_loader, which on load fetches a platform-specific executable from Cloudflare Workers endpoints (oob-worker.cf10{0-3}-*.workers.dev) with a DNS TXT fallback under *.dl.well1.site. Destination hostnames are reconstructed at runtime from arrays of substrings joined together to evade static analysis. The fetched binary is written to /tmp or %TEMP% under decoy names (dotnet_diag_*.exe, analytics_state), chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe, granting the remote operator arbitrary code execution on any host that installs or imports this package. The package name is a long typosquat-shaped identifier impersonating internal Tinkoff namespacing.

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-2026-12275?

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-2026-12275 is a malicious package: tinkoff-statist-browser-typed-client-sme.rko.origsmartphonepaytb.common.mobile.events (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-2026-12275/ (Markdown: https://insights.sbomify.com/MAL-2026-12275/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12275

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12275/
Summaries are generated and may contain mistakes; the official description above is the record.