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Malicious package

bnpl-blocks-independent-bnpl-breadcrumbsnpm

Advisory published Updated

bnpl-blocks-independent-bnpl-breadcrumbs is a confirmed malicious npm package (MAL-2026-12950) that steals credentials and exfiltrates sensitive data (malicious version 35.6.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-blocks-independent-bnpl-breadcrumbs (npm)

MAL-2026-12950
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall bnpl-blocks-independent-bnpl-breadcrumbs

What this malware does

On require of the package, index.js unconditionally loads setup.js, which downloads an opaque binary from one of four hardcoded *.workers.dev endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback via resolvers under dl.wel1.ru (sdk./ext./pkg./net.). Hostnames and resolver domains are assembled at runtime from split-string fragments to evade static analysis. The downloaded bytes are written to a temporary path under a deceptive name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmodded 0755, and detach-spawned via /bin/sh -c "<path> &" or cmd.exe /c start. Cover-story environment variables (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT) and cache/diagnostic naming disguise the dropper as telemetry. Reachable on first require() of the package; no user opt-in required.

Malicious versions

1 flagged
35.6.6

Indicators of compromise (SHA-256)

f1d442b520a1779845bf9dc5d8a0cd822606ec46e0a01850143b93e14658cfe9

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for bnpl-blocks-independent-bnpl-breadcrumbs (version 35.6.6).

  2. If you installed it — respond

    bnpl-blocks-independent-bnpl-breadcrumbs 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-independent-bnpl-breadcrumbs was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. bnpl-blocks-independent-bnpl-breadcrumbs on npm has been identified as a malicious package (version 35.6.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015432

References

Credits

  • Amazon Inspector · finder

Detect & block this

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

Malware detection Runtime egress monitoring

Explore

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bnpl-blocks-independent-bnpl-breadcrumbs (npm) malicious package — MAL-2026-12950 | O3 Security