MAL-2026-13029 Malicious code in boxy-add-link (npm)
Malicious package
Published
MAL-2026-13029 is a malicious package: boxy-add-link (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-2026-13029/ (Markdown: https://insights.sbomify.com/MAL-2026-13029/index.md)
- Package
- boxy-add-link
- Registry
- npm
What is MAL-2026-13029?
MAL-2026-13029 is a malicious package in boxy-add-link, published on 5 Aug 2026.
Official description
On require('boxy-add-link'), index.js loads compat.js whose top-level bootstrap selects a platform-specific payload URL from string-split-obfuscated hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev), retrieves an opaque binary over https.get, writes it to /tmp/.cache<hex> on unix or %TEMP%\dotnet_diag_<hex>.exe on windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd /c start. If the HTTPS fetch fails, the module reassembles a base64-encoded payload from sequential DNS TXT records under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru) and feeds the same write-chmod-spawn pipeline. Hostnames and API names (child_process, chmodSync) are constructed at runtime from split fragments to evade string scanning. A second, structurally identical dropper is staged in lib/telemetry.js but is not reachable from the main entry in this version.
What should I do about MAL-2026-13029?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.