bnpl-blocks-data-schema-generatornpm
bnpl-blocks-data-schema-generator is a confirmed malicious npm package (MAL-2026-12909) that executes malicious code on install (malicious version 35.2.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in bnpl-blocks-data-schema-generator (npm)
What this malware does
index.js unconditionally requires bootstrap.js, which on module load reconstructs Cloudflare Workers subdomains (oob-worker.cf10x-xxx.workers.dev) and *.dl.wel1.ru hosts from split string fragments, fetches a platform-specific executable via https.get with a DNS-TXT fallback that reassembles base64 chunks from numbered subdomains, writes the payload to a temp path under disguised names (e.g. dotnet_diag.exe,.cache_), chmods 0755 on Unix, and spawns it detached via /bin/sh -c or cmd.exe /c start. A second file lib/telemetry.js labelled as a telemetry SDK contains the same write+chmod+spawn primitives (Buffer.from(chunks,'base64'), cp.spawn('/bin/sh',['-c', filePath+' &']), fs['chmod'+'Sync'](extensionPath, 0755)) as a redundant dropper. The behavior fires whenever any consumer require()s the package, giving arbitrary remote code execution on the installer's host.
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-data-schema-generator (version 35.2.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging bnpl-blocks-data-schema-generator across your stack and pipelines.
If you installed it — respond
Remove bnpl-blocks-data-schema-generator 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-data-schema-generator 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-data-schema-generator 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-data-schema-generator-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.