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Malicious package

sme-rko-finance-front-operations-penaltynpm

Advisory published Updated

sme-rko-finance-front-operations-penalty is a confirmed malicious npm package (MAL-2026-13645) 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-penalty (npm)

MAL-2026-13645
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall sme-rko-finance-front-operations-penalty

What this malware does

On require() of the package, runtime.js and lib/telemetry.js reassemble Cloudflare Workers hostnames (oob-worker.cf103-07/cf99-9b3/cf100-416/cf101-adf.workers.dev) from split string arrays, fetch a platform-specific binary from /pkg/package[-arm64|.exe|loader_mac], write it to /var/tmp/.cache<uid> on Unix or %TEMP%\dotnet_diag_<uid>.exe on Windows, chmod 0755, and spawn it detached via /bin/sh -c or cmd.exe. A DNS TXT chunked-base64 fallback channel to .dl.wel1.ru is used when HTTPS fails. Obfuscation techniques include string-split concatenation of host names, dynamic require("child_" + "process"), bracket-notation fs["chmod" + "Sync"], and disguised filenames masquerading as system diagnostics (dotnet_diag,.analytics_state,.cache_). Both the auxiliary _runtime.js and the main entrypoint lib/telemetry.js reachable via index.js contain the dropper primitives, ensuring execution on import.

Malicious versions

1 flagged
35.8.1

Indicators of compromise (SHA-256)

6b92a10d396bb1914ec6de4aff1dbd6845b09bcc1087fa8b1c49cf455d33d887

Detection & response playbook

Malicious package

  1. Find it

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

  2. If you installed it — respond

    Remove sme-rko-finance-front-operations-penalty 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-penalty 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-penalty 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-2026-017140

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks sme-rko-finance-front-operations-penalty-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

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sme-rko-finance-front-operations-penalty (npm) malicious package — MAL-2026-13645 | O3 Security