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Malicious package

bnpl-molecule-mobile-bnpl-onboardingnpm

Advisory published Updated

bnpl-molecule-mobile-bnpl-onboarding is a confirmed malicious npm package (MAL-2026-13025) that typosquats a legitimate package to trick installs (malicious version 35.7.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-molecule-mobile-bnpl-onboarding (npm)

MAL-2026-13025
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall bnpl-molecule-mobile-bnpl-onboarding

What this malware does

On require of the package, index.js loads runtime.js which selects a platform-keyed asset (linux/darwin/win32), downloads an opaque binary from one of three string-split-obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT-record base64 fallback via wel1.ru subdomains, writes the payload to /var/tmp or %TEMP% under a masquerading filename (dotnet_diag<hex>.exe on Windows,.cache_<hex> on Unix), chmods it 0755, and detached-spawns it via /bin/sh -c or cmd.exe /c start /b. Destination hostnames are reconstructed by joining split fragments (e.g. ["oob-worker.cf1","00-416.wo","rkers",".d","ev"].join("")) to evade static analysis, and a decoy no-op logger writes empty strings to stderr. The package name impersonates a BNPL onboarding module but ships no such functionality.

Malicious versions

1 flagged
35.7.8

Indicators of compromise (SHA-256)

23d110510740ced78dc5855c7f9c0c3dedff3669ad49cb52aeee3c5467f00d3b

Detection & response playbook

Typosquat

  1. Find it

    Search your lockfiles and build artifacts for bnpl-molecule-mobile-bnpl-onboarding (version 35.7.8).

  2. If you installed it — respond

    bnpl-molecule-mobile-bnpl-onboarding is a typosquat — you almost certainly intended a legitimately-named package. Remove bnpl-molecule-mobile-bnpl-onboarding, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

  3. Did it already run?

    If bnpl-molecule-mobile-bnpl-onboarding 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-molecule-mobile-bnpl-onboarding on npm has been identified as a malicious package (version 35.7.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015361

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks bnpl-molecule-mobile-bnpl-onboarding-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.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
bnpl-molecule-mobile-bnpl-onboarding (npm) malicious package — MAL-2026-13025 | O3 Security