sme-rko-finance-front-payments-feed-adapternpm
sme-rko-finance-front-payments-feed-adapter is a confirmed malicious npm package (MAL-2026-13661) 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-payments-feed-adapter (npm)
What this malware does
The package is advertised as a finance/payments adapter but on require() reaches a staged loader. _adapter.js reconstructs destination hostnames from split array literals (e.g., ['oob-worker.','cf101-adf.workers.d','ev'].join('')) to hide oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, and oob-worker.cf99-9b3.workers.dev, with a DNS TXT chunked-fallback channel to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. A platform-specific asset (/pkg/package, /pkg/package.exe, or /pkg/package_mac) is downloaded, written to /var/tmp/.cache_<hex> or Windows TEMP dotnet_diag_<hex>.exe to masquerade as a system diagnostic, chmod 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}).unref(). A stamp file gates re-runs. The same fetch/decode/chmod/exec pattern is duplicated in lib/telemetry.js — the module exposed as index.js's public API — using require('child_' + 'process'), Buffer.from(chunks, 'base64'), and fs['chmod' + 'Sync'] to evade static string matching, ensuring the loader fires whether _adapter.js or telemetry.js is loaded first. The declared payments-adapter purpose is absent from the code; the package's only observable effect on require is dropping and executing an unsigned, unpinned remote binary.
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-payments-feed-adapter (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-feed-adapter across your stack and pipelines.
If you installed it — respond
Remove sme-rko-finance-front-payments-feed-adapter 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-payments-feed-adapter 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-feed-adapter 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-feed-adapter-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.