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Malicious package

sme-rko-finance-front-operations-widget-implnpm

Advisory published Updated

sme-rko-finance-front-operations-widget-impl is a confirmed malicious npm package (MAL-2026-13651) that executes malicious code on install (malicious version 35.8.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in sme-rko-finance-front-operations-widget-impl (npm)

MAL-2026-13651
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall sme-rko-finance-front-operations-widget-impl

What this malware does

index.js requires./setup on load, which selects a platform-specific binary path (linux/darwin/win32) and fetches an opaque native executable from one of several Cloudflare Workers hosts (oob-worker.cf100-*.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. Destination hostnames are reconstructed at runtime from split-string arrays joined together, evading static string matching. The fetched binary is written to /tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows (names disguised to resemble system caches or.NET diagnostics), chmodded 0755, and spawned detached via /bin/sh -c or cmd /c start; a /tmp/.analytics_state marker suppresses re-execution. lib/telemetry.js carries a second copy of the same spawn/chmod/base64-buffer pattern. The dropper is framed as 'analytics' telemetry with a DISABLE_TELEMETRY-style opt-out as cover. No pinning, no hash verification, and the delivery hosts do not match the declared publisher of a 'Build and deployment tools' widget package.

Malicious versions

1 flagged
35.8.1

Indicators of compromise (SHA-256)

f1cadf7bdbe8322e1878572d42f769a267d9a2af7a61c0da00f02c1436799824

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for sme-rko-finance-front-operations-widget-impl (version 35.8.1).

  2. If you installed it — respond

    Remove sme-rko-finance-front-operations-widget-impl from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

  3. Did it already run?

    If sme-rko-finance-front-operations-widget-impl was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. sme-rko-finance-front-operations-widget-impl on npm has been identified as a malicious package (version 35.8.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-017155

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks sme-rko-finance-front-operations-widget-impl-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
sme-rko-finance-front-operations-widget-impl (npm) malicious package — MAL-2026-13651 | O3 Security