What does the bnpl-blocks-feature-partners malware do?

index.js unconditionally require()'s./_ext.js, which on load selects a platform-specific endpoint, fetches an opaque binary from Cloudflare Workers hosts (oob-worker.cf10{1,2,3}-*.workers.dev) reassembled from split string literals, with a DNS-TXT chunked base64 fallback via *.dl.wel1.ru subdomains, writes the payload to /var/tmp/.cache_ on Unix or %TEMP%\dotnet_diag_ .exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Network destinations and sensitive API names (child_process, chmodSync) are reconstructed at runtime from split-string arrays to evade static scanners. No integrity check, no hash/signature verification, filename disguises (.

Which versions of bnpl-blocks-feature-partners are malicious?

The following npm versions of bnpl-blocks-feature-partners are flagged malicious: 35.9.1. Treat any of these as compromised.

How do I remediate bnpl-blocks-feature-partners if I installed it?

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

I already installed bnpl-blocks-feature-partners — how do I know if it already compromised me?

If bnpl-blocks-feature-partners 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.

Is bnpl-blocks-feature-partners part of a known attack campaign?

Yes — bnpl-blocks-feature-partners is associated with the IN-MAL-2026-015435 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find bnpl-blocks-feature-partners across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bnpl-blocks-feature-partners (version 35.9.1).

Malicious package

bnpl-blocks-feature-partnersnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

bnpl-blocks-feature-partners is a confirmed malicious npm package (MAL-2026-12947) that typosquats a legitimate package to trick installs (malicious version 35.9.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-blocks-feature-partners (npm)

MAL-2026-12947

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall bnpl-blocks-feature-partners

What this malware does

index.js unconditionally require()'s./ext.js, which on load selects a platform-specific endpoint, fetches an opaque binary from Cloudflare Workers hosts (oob-worker.cf10{1,2,3}-*.workers.dev) reassembled from split string literals, with a DNS-TXT chunked base64 fallback via *.dl.wel1.ru subdomains, writes the payload to /var/tmp/.cache<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Network destinations and sensitive API names (child_process, chmodSync) are reconstructed at runtime from split-string arrays to evade static scanners. No integrity check, no hash/signature verification, filename disguises (.cache_ / dotnet_diag_) mimic system caches, and the fetched code is unrelated to any stated package purpose. The dropper fires on any require() of this package.

Malicious versions

1 flagged

35.9.1

Indicators of compromise (SHA-256)

40f5d479d4fbf50975912fcbb27c8a3638cfeef78c8bd8a2e666162756abc788

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for bnpl-blocks-feature-partners (version 35.9.1).
If you installed it — respond
bnpl-blocks-feature-partners is a typosquat — you almost certainly intended a legitimately-named package. Remove bnpl-blocks-feature-partners, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If bnpl-blocks-feature-partners 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-feature-partners on npm has been identified as a malicious package (version 35.9.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015435

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bnpl-blocks-feature-partners-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