sme-rko-finance-front-payments-currency-payment-domainnpm
sme-rko-finance-front-payments-currency-payment-domain is a confirmed malicious npm package (MAL-2026-13659) that opens a backdoor for remote access (malicious version 35.8.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in sme-rko-finance-front-payments-currency-payment-domain (npm)
What this malware does
On require() of this package, index.js loads./loader.js which reconstructs C2 hostnames via array-join string concealment (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev), with a DNS TXT-record payload channel fallback under *.dl.wel1.ru whose sequenced records are base64-decoded and concatenated. The loader fetches a platform-specific executable, writes it to /tmp or Windows Temp under a disguised name (.cache<hex> or dotnet_diag_<hex>.exe), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe with unref(). A secondary duplicate path in lib/telemetry.js (re-exported by the main entry) uses concatenated identifier strings ('child_'+'process', 'chmod'+'Sync') to evade static scanners, base64-decodes chunks into an executable, chmods 755, and spawns via /bin/sh under an 'analytics-sdk' cover story. The package name mimics an internal corporate scope (sme-rko-finance-front-payments-currency-payment-domain) while being published unscoped and public on npm with a generic 'API client wrappers' description and empty author field, matching the shape of a dependency-confusion lure targeting a specific organization's private package name. Installing or importing this package results in full-host native code execution on the installer's machine from attacker-controlled infrastructure.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind 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-payments-currency-payment-domain (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-payments-currency-payment-domain across your stack and pipelines.
If you installed it — respond
sme-rko-finance-front-payments-currency-payment-domain establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If sme-rko-finance-front-payments-currency-payment-domain 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-payments-currency-payment-domain 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-payments-currency-payment-domain-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.