# MAL-2026-12273: Malicious code in tinkoff-statist-browser-typed-client-sme.rko.authorization.common (npm)


- **Type:** Malicious package
- **Package:** `tinkoff-statist-browser-typed-client-sme.rko.authorization.common` (npm)
- **Published:** 5 Aug 2026
- **Also known as:** GHSA-8q7h-2qw7-c3cr

## What is MAL-2026-12273?

MAL-2026-12273 is a malicious package in tinkoff-statist-browser-typed-client-sme.rko.authorization.common, published on 5 Aug 2026. 

### Official description

The package typosquats an internal Tinkoff scope name. On require(), index.js loads _init.js, which builds attacker hostnames at runtime from string-fragment arrays joined via.join("") (e.g., ["oob-wor","ker.cf100","-416.wor","kers",".dev"].join("")), downloads an opaque binary from one of four Cloudflare Workers mirrors (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev) with DNS TXT fallback via tin.dl.well1.site / tina.dl.well1.site / ldr.dl.well1.site / win.dl.well1.site, writes it to /tmp or %TEMP% under names mimicking Microsoft diagnostics (dotnet_diag_<hex>.exe /.cache_<hex>), applies executable permissions via fs["chmod"+"Sync"], and spawns it detached via cp.spawn("/bin/sh", ["-c", filePath + " &"], {detached:true}) or cmd.exe. Dangerous APIs are split-string-obfuscated (require("child_"+"process"), os["host"+"name"]) to evade string scanners. lib/telemetry.js contains a redundant WorkerHost download-and-execute path with base64 payload decoding and the same spawn/chmod primitives. An opt-out env-var check (DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK) and a /tmp/.analytics_state stamp gate limit re-execution to roughly once per six hours, characteristic of dropper anti-analysis rather than legitimate telemetry. The declared "shared primitives" purpose is inconsistent with fetching and executing a native binary.

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-2026-12273?

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-2026-12273 is a malicious package: tinkoff-statist-browser-typed-client-sme.rko.authorization.common (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-2026-12273/ (Markdown: https://insights.sbomify.com/MAL-2026-12273/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/MAL-2026-12273

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From sbomify Insights: https://insights.sbomify.com/MAL-2026-12273/
Summaries are generated and may contain mistakes; the official description above is the record.