NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
Malicious package

bnpl-forms-test-utilsnpm

Advisory published Updated

bnpl-forms-test-utils is a confirmed malicious npm package (MAL-2026-13024) that executes malicious code on install (malicious version 35.4.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-forms-test-utils (npm)

MAL-2026-13024
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall bnpl-forms-test-utils

What this malware does

On require('bnpl-forms-test-utils'), index.js loads platform.js, which selects a platform-specific endpoint and downloads an opaque binary via https.get from one of three Cloudflare Workers hosts reconstructed at runtime from split-string arrays: oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, and oob-worker.cf103-070.workers.dev. A DNS TXT fallback under {sdk,ext,pkg,net}.dl.wel1.ru reassembles base64 chunks when the HTTPS hosts fail. The fetched bytes are written to /var/tmp or %TEMP% under masquerading names (.cache<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod 0755'd, and detached via spawn('/bin/sh', ['-c', path+' &'], {detached:true}) or spawn('cmd.exe', ['/c', 'start',...]). Hostnames and API names are obfuscated via array-join and string concatenation (e.g. require('child_'+'process'), fs['chmod'+'Sync']). A second dropper module lib/telemetry.js (~81 KB) shipped in the tarball implements the same fetch/chmod/spawn/detach pattern with identical obfuscation, though it is not referenced from the current main. The declared purpose is common helpers; no native source ships in the package to justify the binary download.

Malicious versions

1 flagged
35.4.1

Indicators of compromise (SHA-256)

4cd6e149b86406225e3aca99e9bbae44cf13c0c7d5e10be27155162b63832f2f

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for bnpl-forms-test-utils (version 35.4.1).

  2. If you installed it — respond

    Remove bnpl-forms-test-utils 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.

  3. Did it already run?

    If bnpl-forms-test-utils 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-forms-test-utils on npm has been identified as a malicious package (version 35.4.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015349

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks bnpl-forms-test-utils-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.

Explore

bnpl-forms-test-utils (npm) malicious package — MAL-2026-13024 | O3 Security