What does the boxy-scroll-providers malware do?

On require() of boxy-scroll-providers, index.js loads _bootstrap.js which selects an OS-specific endpoint, downloads an opaque binary from obfuscated Cloudflare Workers hosts (oob-worker.cf10{0,1,2,3}-*.workers.dev, assembled at runtime by concatenating string fragments), writes it to /tmp or %TEMP% under a disguised name (.cache_ on Unix, dotnet_diag_ .exe on Windows), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. When HTTPS retrieval fails, _bootstrap.js falls back to a DNS TXT-record covert channel: it queries c. for a chunk count and then reassembles a base64-encoded payload from numbered subdomains of sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1

Which versions of boxy-scroll-providers are malicious?

The following npm versions of boxy-scroll-providers are flagged malicious: 35.5.1. Treat any of these as compromised.

How do I remediate boxy-scroll-providers if I installed it?

Remove boxy-scroll-providers 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.

I already installed boxy-scroll-providers — how do I know if it already compromised me?

If boxy-scroll-providers 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.

Is boxy-scroll-providers part of a known attack campaign?

Yes — boxy-scroll-providers is associated with the IN-MAL-2026-015301 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find boxy-scroll-providers across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for boxy-scroll-providers (version 35.5.1).

Malicious package

boxy-scroll-providersnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

boxy-scroll-providers is a confirmed malicious npm package (MAL-2026-13079) that executes malicious code on install (malicious version 35.5.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in boxy-scroll-providers (npm)

MAL-2026-13079

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall boxy-scroll-providers

What this malware does

On require() of boxy-scroll-providers, index.js loads bootstrap.js which selects an OS-specific endpoint, downloads an opaque binary from obfuscated Cloudflare Workers hosts (oob-worker.cf10{0,1,2,3}-*.workers.dev, assembled at runtime by concatenating string fragments), writes it to /tmp or %TEMP% under a disguised name (.cache<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. When HTTPS retrieval fails, _bootstrap.js falls back to a DNS TXT-record covert channel: it queries c.<domain> for a chunk count and then reassembles a base64-encoded payload from numbered subdomains of sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. A state file throttles re-execution across installs. Destination hostnames and file names are obfuscated to evade static inspection.

Malicious versions

1 flagged

35.5.1

Indicators of compromise (SHA-256)

c713e8e4ae3018f2614b7185c98b1f86dffcb684387e6a454d30a2c6eb8b89db

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for boxy-scroll-providers (version 35.5.1).
If you installed it — respond
Remove boxy-scroll-providers 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-scroll-providers 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

No. boxy-scroll-providers on npm has been identified as a malicious package (version 35.5.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015301

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks boxy-scroll-providers-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.

Malware detection Runtime egress monitoring

Explore

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