Which versions of sixseven4 are malicious?

The following npm versions of sixseven4 are flagged malicious: 1.1.7, 1.7.7, 2.0.0. Treat any of these as compromised.

How do I remediate sixseven4 if I installed it?

Remove sixseven4 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 sixseven4 — how do I know if it already compromised me?

If sixseven4 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is sixseven4 part of a known attack campaign?

Yes — sixseven4 is associated with the GHSA-5x4x-hfqx-ccqm, IN-MAL-2026-010185, IN-MAL-2026-010184, IN-MAL-2026-010186 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 sixseven4 across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for sixseven4 (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging sixseven4 across your stack and pipelines.

Malicious package

sixseven4npm

Malicious code in sixseven4 (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-10376

Immediate action

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

npm uninstall sixseven4

What this malware does

The package declares no install/postinstall/preinstall lifecycle scripts, and its declared main is sw.js — a browser ServiceWorker that uses importScripts, self.addEventListener('install'|'fetch'|'activate'), and self.clients.claim(). Loading it in Node via require() would throw on the browser-only globals before any code ran, so installing this package does not execute any of the bundled assets on a developer's machine. The tarball ships a static 'web unblocker' proxy site (HTML masquerading as 'Riverbend Tutoring' that injects a popunder to https://abdct.com on user click, plus the ServiceWorker that proxies cross-origin fetches and rewrites HTML), along with multiple heavily obfuscated JS bundles under assets/ (e.g. assets/3oruu3por5.js, assets/blhj60cfaf.js, etc.) consistent with that proxy site rather than with a Node library. A bundled auto-publish.sh enumerates a sequential family of package names (sixseven1..sixseven10), indicating this publish is part of a name-squat batch on the npm registry. Risk to anyone running npm install sixseven9 is limited to disk usage and registry pollution; the obfuscated assets and ad popunder only affect end users of a hypothetical site that deploys this code, not developers who install the package. Routing to human review so the registry can decide whether to remove the squat batch.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

3 flagged

1.1.71.7.72.0.0

Indicators of compromise (SHA-256)

5fcce57d181606fb4fb96d5d98db4db4d01aab413e9c83cd620816d3af23da60

1dfd6ff82b27df8c8ecd3520e70b720e0ff6e6f4443e21d1230acebdfd032b6d

785928f3cc4dd87bc96ab34994af89a817173918f1905462a96a95168cdc0b4a

86e776b4da586b6ff0baa45b2e58944f9a61885fc8867e8ba68855670a43a128

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for sixseven4 (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging sixseven4 across your stack and pipelines.
If you installed it — respond
Remove sixseven4 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 sixseven4 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks sixseven4 before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. sixseven4 on npm has been identified as a malicious package (versions 1.1.7, 1.7.7, 2.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-5x4x-hfqx-ccqmIN-MAL-2026-010185IN-MAL-2026-010184IN-MAL-2026-010186

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks sixseven4-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