MAL-2026-13064 Malicious code in boxy-maker-skeleton (npm)
Malicious package
Published
MAL-2026-13064 is a malicious package: boxy-maker-skeleton (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-2026-13064/ (Markdown: https://insights.sbomify.com/MAL-2026-13064/index.md)
- Package
- boxy-maker-skeleton
- Registry
- npm
What is MAL-2026-13064?
MAL-2026-13064 is a malicious package in boxy-maker-skeleton, published on 5 Aug 2026.
Official description
On require of boxy-maker-skeleton, index.js loads compat.js which reconstructs destination hostnames by string-splitting/join to hide them from static scanners, then downloads a platform-specific binary over HTTPS from oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, and oob-worker.cf100-416.workers.dev (with a DNS-TXT base64 fallback via *.dl.wel1.ru). The fetched bytes are written to a temp path under a masquerading name (.cache<tok> on POSIX, dotnet_diag_<tok>.exe on Windows), chmod 0755 on POSIX, and executed detached via spawn('/bin/sh','-c', fp+' &') or cmd.exe /c start /b. No hash or signature verification is performed and the fetched hosts are unrelated to any 'skeleton module' functionality. Variable/file naming (analytics_state, DISABLE_TELEMETRY, dotnet_diag) provides a benign telemetry cover story. Installing or requiring this package causes attacker-controlled code to execute on the installer's host.
What should I do about MAL-2026-13064?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.