sme-rko-finance-front-operations-overnight

Details

**Severity:** Critical

**Affected versions:** `= 35.8.1`

## Source: amazon-inspector (bcd5c58bd9b678ac91c87dbb7f9a1d2318c67cd3754d643550c7674c903186de)
On require, this package loads _ext.js and lib/telemetry.js which fetch a platform-specific opaque binary from a rotating list of attacker-controlled Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT chunked-base64 fallback via *.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under a disguised name (`.cache_<hex>`, `dotnet_diag_<hex>.exe`), chmodded to 0o755, and spawned detached via `/bin/sh -c "<path> &"` or `cmd.exe` with stdio ignored. Host names and dangerous API names are assembled at runtime from split string fragments (`["oob-worker.cf100-416.wo","rkers",".de","v"].join("")`, `require("child_" + "process")`, `fs["chmod"+"Sync"](...)`) to evade static scanners. A mtime-based stamp file at /tmp/.analytics_state and DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK env checks gate execution to at most once per TTL, reducing repeat-analysis and sandbox detection. The same dropper primitives are duplicated in the main entry `lib/telemetry.js` under an 'Analytics SDK' cover story so the payload fires even if _ext.js is removed. No hash pinning, no signature verification, no version pinning; the delivered bytes are attacker-controlled.

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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-operations-overnight/MAL-2026-13643.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/f4865d38bdd8cf89a75895cd20168baaaa03aea4/osv/malicious/npm/sme-rko-finance-front-operations-overnight/MAL-2026-13643.json
- https://www.npmjs.com/package/sme-rko-finance-front-operations-overnight/v/35.8.1
- https://github.com/advisories/GHSA-c9vg-pfhf-qxw9

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.