MAL-2026-12570 Malicious code in checkout-mobile-accounts (npm)
Malicious package
Published
MAL-2026-12570 is a malicious package: checkout-mobile-accounts (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-2026-12570/ (Markdown: https://insights.sbomify.com/MAL-2026-12570/index.md)
- Package
- checkout-mobile-accounts
- Registry
- npm
What is MAL-2026-12570?
MAL-2026-12570 is a malicious package in checkout-mobile-accounts, published on 5 Aug 2026.
Official description
On require(), the package loads platform.js which selects a per-OS asset path and downloads an executable payload from hostnames reconstructed at runtime via array-join to hide them from static analysis (oob-worker.cf100-416.workers.dev, cf102-baf.workers.dev, cf99-9b3.workers.dev, and sdk/ext/pkg/net.dl.wel1.ru), with a DNS-TXT covert-channel fallback. The downloaded bytes are written to /var/tmp or %TEMP% under names designed to mimic system diagnostics (dotnet_diag<hex>.exe on Windows,.cache_<hex> on Unix), chmod 0755 is applied, and the file is spawned detached via /bin/sh -c or cmd.exe. A lock file named.analytics_state is written to blend in as telemetry state. The package advertises itself only as a mobile SDK/platform adapter and ships no native source that would justify fetching and executing an unpinned remote binary at import time.
What should I do about MAL-2026-12570?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.