MAL-2026-12955 Malicious code in bnpl-blocks-independent-bnpl-faq (npm)
Malicious package
Published
MAL-2026-12955 is a malicious package: bnpl-blocks-independent-bnpl-faq (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-12955/ (Markdown: https://insights.sbomify.com/MAL-2026-12955/index.md)
- Package
- bnpl-blocks-independent-bnpl-faq
- Registry
- npm
What is MAL-2026-12955?
MAL-2026-12955 is a malicious package in bnpl-blocks-independent-bnpl-faq, published on 5 Aug 2026.
Official description
On require() of this package, index.js loads runtime.js which downloads a platform-specific binary over HTTPS from obfuscated hosts (oob-worker.cf<n>-<n>.workers.dev, assembled by joining fragmented string arrays to evade static scans), writes it to a disguised path in /tmp or %TEMP% (e.g..cache<hex> or dotnet_diag_<hex>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. If HTTPS fails, _runtime.js falls back to reassembling a base64-encoded binary from DNS TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru subdomains and executes it via the same path. No hash or signature verification is performed, and destination hostnames are hidden via array-join obfuscation. The package advertises itself as a BNPL FAQ adapter; the declared purpose does not require binary downloads or a DNS covert channel.
What should I do about MAL-2026-12955?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.