sixseven5npm
sixseven5 is a confirmed malicious npm package (MAL-2026-10377) that executes malicious code on install (malicious versions 1.1.7, 1.7.7, 2.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in sixseven5 (npm)
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
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for sixseven5 (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging sixseven5 across your stack and pipelines.
If you installed it — respond
Remove sixseven5 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 sixseven5 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 sixseven5 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks sixseven5-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.