sme-rko-finance-front-operations-taxnpm
sme-rko-finance-front-operations-tax is a confirmed malicious npm package (MAL-2026-13649) 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-tax (npm)
What this malware does
On require, index.js loads platform.js and lib/telemetry.js, which download a platform-specific binary from obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, cf103-070, cf102-baf) with a DNS TXT-record fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or Windows Temp under disguised names (e.g.,.cache<hex>, dotnet_diag_<hex>.exe), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Hostnames and sensitive API names (child_process, chmodSync) are reassembled at runtime from split string arrays to defeat static analysis. The package's stated purpose (finance/tax operations frontend) has no legitimate need to fetch and execute an opaque native binary from non-publisher infrastructure.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for sme-rko-finance-front-operations-tax (version 35.8.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging sme-rko-finance-front-operations-tax across your stack and pipelines.
If you installed it — respond
Remove sme-rko-finance-front-operations-tax 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.
Did it already run?
If sme-rko-finance-front-operations-tax was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks sme-rko-finance-front-operations-tax before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks sme-rko-finance-front-operations-tax-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.