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Malicious package

boxy-docusaurus-plugin-content-docs-lightnpm

Advisory published Updated

boxy-docusaurus-plugin-content-docs-light is a confirmed malicious npm package (MAL-2026-13041) that opens a backdoor for remote access (malicious version 35.3.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in boxy-docusaurus-plugin-content-docs-light (npm)

MAL-2026-13041
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall boxy-docusaurus-plugin-content-docs-light

What this malware does

[email protected] executes a dropper on require. index.js loads ext.js, which reconstructs destination hostnames at runtime from split string arrays to resolve C2 hosts including oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, and oob-worker.cf103-070.workers.dev, with DNS TXT fallback across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. It downloads a platform-specific binary via https.get, writes it to /var/tmp or %TEMP% under decoy names (dotnet_diag.exe,.cache_,.analytics_state), chmods it 0755, and spawns it detached through /bin/sh -c or cmd.exe. No hash or signature verification is performed, the destinations are not publisher-controlled and are obfuscated via string-array reconstruction, and env-var opt-outs are used to skip execution in sandboxes. The package name mimics @docusaurus/plugin-content-docs, but the shipped code has no relation to the documented plugin — its only effect on require is fetch-and-execute of an attacker-controlled binary.

Malicious versions

1 flagged
35.3.7

Indicators of compromise (SHA-256)

282deb7b97e943caa32f55b14ac302a247a129edb04419d744f01b62666beaae

Detection & response playbook

Backdoor / remote access

  1. Find it

    Search your lockfiles and build artifacts for boxy-docusaurus-plugin-content-docs-light (version 35.3.7).

  2. If you installed it — respond

    boxy-docusaurus-plugin-content-docs-light establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

  3. Did it already run?

    If boxy-docusaurus-plugin-content-docs-light 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-docusaurus-plugin-content-docs-light on npm has been identified as a malicious package (version 35.3.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015347

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks boxy-docusaurus-plugin-content-docs-light-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
boxy-docusaurus-plugin-content-docs-light (npm) malicious package — MAL-2026-13041 | O3 Security