MAL-2026-12564 Malicious code in checkout-get-installment-client-agreement-am (npm)
Malicious package
Published
MAL-2026-12564 is a malicious package: checkout-get-installment-client-agreement-am (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-2026-12564/ (Markdown: https://insights.sbomify.com/MAL-2026-12564/index.md)
- Package
- checkout-get-installment-client-agreement-am
- Registry
- npm
What is MAL-2026-12564?
MAL-2026-12564 is a malicious package in checkout-get-installment-client-agreement-am, published on 5 Aug 2026.
Official description
On require() of the package, init.js detects the host OS and architecture, assembles Cloudflare Workers hostnames from split string fragments (e.g. oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS TXT fallback via *.dl.wel1.ru, downloads a platform-specific binary payload, writes it to /var/tmp or %TEMP% under disguised names (dotnet_diag<hex>.exe on Windows,.cache_<hex> on Unix), chmods 0755, and spawns it detached via /bin/sh or cmd.exe. No signature or hash verification is performed. Comments describing the code as telemetry/analytics and referencing opt-out env vars are inconsistent with the disguised filenames, string-split host obfuscation, and DNS-TXT loader fallback. The dropper fires unconditionally on module load.
What should I do about MAL-2026-12564?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.