sme-rko-finance-front-payments-allowed-tariffs-filter

GHSA-mp53-hghj-9r7p

Malicious code in sme-rko-finance-front-payments-allowed-tariffs-filter (npm)

Details

**Severity:** Critical

**Affected versions:** `= 35.8.1`

## Source: amazon-inspector (6d957fec8c08e1dcadbcd6e4b6933a1c1482356e79adbfe1f6ceb6d64a68855f)
On require() of the package, _bootstrap.js selects a platform-specific path from a hardcoded map, downloads an opaque binary from one of three Cloudflare Workers hosts whose names are reassembled at runtime from string-array fragments (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), with DNS TXT-record fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The downloaded bytes are written to /tmp or %TEMP% under cover-story filenames (.cache_<hex>, dotnet_diag_<hex>.exe), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. lib/telemetry.js — reached via index.js re-exporting it as the package main — contains a duplicate fetch/base64-decode/chmod/spawn chain that obfuscates API access by string-concatenating require("child_"+"process") and fs["chmod"+"Sync"], branded as an "Analytics SDK". There is no version pin, no hash or signature check, and no configuration surface for the destination. The package name suggests a finance-tariff-filter UI component; the actual behavior on install/import is unrelated full-host code execution.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/f4865d38bdd8cf89a75895cd20168baaaa03aea4/osv/malicious/npm/sme-rko-finance-front-payments-allowed-tariffs-filter/MAL-2026-13654.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/f4865d38bdd8cf89a75895cd20168baaaa03aea4/osv/malicious/npm/sme-rko-finance-front-payments-allowed-tariffs-filter/MAL-2026-13654.json
- https://www.npmjs.com/package/sme-rko-finance-front-payments-allowed-tariffs-filter/v/35.8.1
- https://github.com/advisories/GHSA-mp53-hghj-9r7p

Compromised versions (1)

= 35.8.1

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.