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Malicious package

bnpl-blocks-typesnpm

bnpl-blocks-types is a confirmed malicious npm package (MAL-2026-13020) that steals credentials and exfiltrates sensitive data (malicious version 35.2.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-blocks-types (npm)

MAL-2026-13020
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall bnpl-blocks-types

What this malware does

On require() of bnpl-blocks-types, index.js loads helpers.js which selects a platform-specific path (/pkg/package, /pkg/package.exe, /pkg/loader_mac, /pkg/package-arm64) and downloads a binary from hostnames reconstructed at runtime via array.join to defeat static inspection: oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, and oob-worker.cf99-9b3.workers.dev. If HTTPS retrieval fails, a fallback assembles the payload from base64-encoded DNS TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under decoy names (dotnet_diag<hex>.exe on Windows, hidden.cache_<hex> on Unix), chmod 0755, and spawned detached and unref'd via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}). A second dropper copy is staged as lib/telemetry.js (81 KB, framed as an analytics SDK) containing the same base64-assemble, chmod 0755, and detached /bin/sh spawn pattern, with require('child_'+'process') and fs['chmod'+'Sync'] string-split obfuscation. Behavior is guarded by an mtime cache and opt-out env vars, consistent with a persistent, staged install-time dropper.

Malicious versions

1 flagged
35.2.1

Indicators of compromise (SHA-256)

e5570ecd44264d28f2c2378da5c6cd23e562e696687adb01ab10b373c91e6560

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for bnpl-blocks-types (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-types across your stack and pipelines.

  2. If you installed it — respond

    bnpl-blocks-types is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If bnpl-blocks-types 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.

  4. How O3 protects you

    O3 blocks bnpl-blocks-types 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

No. bnpl-blocks-types on npm has been identified as a malicious package (version 35.2.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015350

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks bnpl-blocks-types-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

bnpl-blocks-types (npm) malicious package — MAL-2026-13020 | O3 Security