bnpl-blocks-atom-bnpl-navigation-arrownpm
bnpl-blocks-atom-bnpl-navigation-arrow is a confirmed malicious npm package (MAL-2026-12881) that executes malicious code on install (malicious version 35.2.6). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in bnpl-blocks-atom-bnpl-navigation-arrow (npm)
What this malware does
Requiring this package executes platform.js, which detects the host OS/arch, fetches an opaque binary from one of four author-controlled Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT base64 fallback resolved via subdomains of wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), writes it to /var/tmp/.cache<hex> on Unix or TEMP/dotnet_diag_<hex>.exe on Windows disguised as a system artifact, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. All destination hostnames, resolver domains, and even the child_process module name are assembled from split string literals (e.g. ["oob-worke","r.cf103-07","0.worke","rs.de","v"].join(""), require("child_" + "process")) to evade signature-based scanners. A second copy of the dropper is bundled in lib/telemetry.js under an 'analytics SDK' cover story, containing the same base64 buffer construction, fs["chmod" + "Sync"] to 0755, and cp.spawn("/bin/sh", ["-c", filePath + " &"]) primitives.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
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 bnpl-blocks-atom-bnpl-navigation-arrow (version 35.2.6). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging bnpl-blocks-atom-bnpl-navigation-arrow across your stack and pipelines.
If you installed it — respond
Remove bnpl-blocks-atom-bnpl-navigation-arrow 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 bnpl-blocks-atom-bnpl-navigation-arrow 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 bnpl-blocks-atom-bnpl-navigation-arrow 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 bnpl-blocks-atom-bnpl-navigation-arrow-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.