boxy-maker-scrollnpm
Advisory published Updated
boxy-maker-scroll is a confirmed malicious npm package (MAL-2026-13063) that executes malicious code on install (malicious version 35.6.7). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in boxy-maker-scroll (npm)
What this malware does
[email protected] executes a remote binary dropper the moment the module is loaded. index.js unconditionally requires polyfill.js, which selects a platform-specific endpoint (linux_x64, darwin_arm64, win32, etc.), downloads an opaque native executable from one of three Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT base64-chunked fallback over *.dl.wel1.ru subdomains, writes the payload to a temp path under a cover-story name (dotnet_diag<hex>.exe on Windows,.cache_<hex> on Unix), chmods it 0755, and spawns it detached via /bin/sh -c '<path> &' on Unix or cmd.exe /c start /b on Windows. Destination hostnames and fallback domains are reconstructed at runtime by.join()-ing split string fragments to defeat plain-text grep. Environment-variable opt-out flags (DISABLE_TELEMETRY and similar) plus a lock file provide plausible-deniability framing, but the package's advertised purpose (a 'boxy maker scroll adapter') has no legitimate need for downloading and executing native binaries from anonymous infrastructure. Installing or requiring this package results in arbitrary attacker-controlled code executing on the installer's machine.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for boxy-maker-scroll (version 35.6.7).
If you installed it — respond
Remove boxy-maker-scroll from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If boxy-maker-scroll was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks boxy-maker-scroll-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.