Which versions of nottuff5 are malicious?

The following npm versions of nottuff5 are flagged malicious: 1.1.7, 1.7.7, 2.0.0. Treat any of these as compromised.

How do I remediate nottuff5 if I installed it?

nottuff5 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.

I already installed nottuff5 — how do I know if it already compromised me?

If nottuff5 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 nottuff5 part of a known attack campaign?

Yes — nottuff5 is associated with the GHSA-hqcf-hxmg-9rgv, IN-MAL-2026-010076, IN-MAL-2026-010074, IN-MAL-2026-010075 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 nottuff5 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 nottuff5 (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging nottuff5 across your stack and pipelines.

Malicious package

nottuff5npm

Malicious code in nottuff5 (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-10357

Immediate action

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

npm uninstall nottuff5

What this malware does

The tarball ships auto-publish.sh, a script that republishes the same payload under ~100 distinct npm names (ishowfeet1-ishowfeet20, nottuff1-nottuff30, abuden*, imillegal*, ratelimitsucks*, etc/) by rewriting package.json.name and running npm publish --silent in a loop — namespace-spam infrastructure shipped inside the package itself. The package's declared main is sw.js, a browser Service Worker (importScripts('./8cfc2/hgshm.js'), self.addEventListener('install'|'activate'|'fetch'|'message')) that throws immediately if loaded from Node. The shipped assets are a heavily obfuscated Ultraviolet/bare-mux web-proxy frontend with an index.html themed as "Riverbend Tutoring" that hides a popunder redirect to https://abdct.com/ on click/keydown/touchstart. package.json declares no preinstall/install/postinstall/prepare hooks, and require('ishowfeet9') from Node fails before any code runs, so a Node installer experiences no auto-execution. The harm is registry abuse (mass-publication of a misleading name family) and a browser-side proxy/popunder served to whoever later loads these static assets — not installer-side compromise. Routing to human review for namespace-abuse adjudication.

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)

aeaa37a35be71c14ab4040dd8100819afd2ca4fb6aa639879ff50ad323acebf8

0e18070e680629849560dab1723a73f80d61312d0a9efe429b0c8f43b2177bbd

7ab0ca87f0c8238d0e0336d8905741ff7a72d393c4a2294caf162b508feef099

b6d23a66f4751d6e57f438538c830e9b220e5ec363b45d330baa614f5a193dbe

Detection & response playbook

Backdoor / remote access

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for nottuff5 (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging nottuff5 across your stack and pipelines.
If you installed it — respond
nottuff5 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.
Did it already run?
If nottuff5 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 nottuff5 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. nottuff5 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-hqcf-hxmg-9rgvIN-MAL-2026-010076IN-MAL-2026-010074IN-MAL-2026-010075

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks nottuff5-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