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Malicious package

bnpl-blocks-mobile-bnpl-feedbacknpm

Advisory published Updated

bnpl-blocks-mobile-bnpl-feedback is a confirmed malicious npm package (MAL-2026-12988) that executes malicious code on install (malicious version 35.3.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bnpl-blocks-mobile-bnpl-feedback (npm)

MAL-2026-12988
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall bnpl-blocks-mobile-bnpl-feedback

What this malware does

On require of the package, index.js loads shim.js which selects a platform-specific binary from a list of string-split-obfuscated Cloudflare Workers hosts (reassembled at runtime, e.g. oob-worker.cf99-9b3.workers.dev), with a DNS-TXT chunked-base64 fallback across wel1.ru subdomains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru; count served at c.<domain>, parts at N.<domain>). The retrieved payload is written to /tmp or %TEMP% under cover names resembling system tooling (dotnet_diag.exe,.cache_), chmodded 0755 on POSIX, and spawned detached via spawn("/bin/sh",["-c", path+" &"],{detached:true}) or spawn("cmd",...) on Windows. The destinations are obfuscated, unrelated to any legitimate publisher, and the executed bytes are attacker-controlled.

Malicious versions

1 flagged
35.3.5

Indicators of compromise (SHA-256)

28f1214c6f46b90fa1bf81bde9a79c81a5193e84969ef756f50cbf895c49515b

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for bnpl-blocks-mobile-bnpl-feedback (version 35.3.5).

  2. If you installed it — respond

    Remove bnpl-blocks-mobile-bnpl-feedback 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-blocks-mobile-bnpl-feedback 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-mobile-bnpl-feedback on npm has been identified as a malicious package (version 35.3.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015401

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks bnpl-blocks-mobile-bnpl-feedback-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

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bnpl-blocks-mobile-bnpl-feedback (npm) malicious package — MAL-2026-12988 | O3 Security