MAL-2026-13085 Malicious code in boxy-story-header (npm)
Malicious package
Published
MAL-2026-13085 is a malicious package: boxy-story-header (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-2026-13085/ (Markdown: https://insights.sbomify.com/MAL-2026-13085/index.md)
- Package
- boxy-story-header
- Registry
- npm
What is MAL-2026-13085?
MAL-2026-13085 is a malicious package in boxy-story-header, published on 5 Aug 2026.
Official description
index.js unconditionally requires./setup on load. setup.js reconstructs C2 hostnames by array-joining string fragments (Cloudflare Workers subdomains including oob-worker.cf99-9b3.workers.dev) and falls back to a base64-chunked DNS-TXT covert channel under numeric subdomains of wel1.ru. It downloads a platform-specific binary via https.get, writes it to /tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe under a hidden or system-masquerading name, chmods it 0755, and spawns it detached through /bin/sh -c or cmd.exe /c start /b with no signature or hash verification. lib/telemetry.js reimplements the same fetch-decode-chmod-spawn dropper primitives (Buffer.from(…,'base64'), fs['chmod'+'Sync'](path, mode|0o755), cp.spawn('/bin/sh',['-c',filePath+' &'],{detached:true})). Host obfuscation, DNS-TXT fallback, hidden/masquerading filenames, and unauthenticated remote execution on import satisfy the install-time-rce fingerprint (known-bad-infrastructure dropper).
What should I do about MAL-2026-13085?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.