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Malicious package

ishowfeet16npm

Advisory published Updated

ishowfeet16 is a confirmed malicious npm package (MAL-2026-10318) that opens a backdoor for remote access (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 ishowfeet16 (npm)

MAL-2026-10318
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall ishowfeet16

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)

f823a0a70c70e9d691e97000172b6da46f11d24ba1665874c6d291bd72083595
37f59327c1b69e899f78c8fdaf7d1b33c2760608adda627306fbac6537257d21
54932689cd581e8fd551ac20aa83336a08843b8175a71165cd97fce1180b875f
2a0ad47aa244e67355c8df443f16f78bac7099185584a9e72dc1bfd48399938b

Detection & response playbook

Backdoor / remote access
  1. Find it

    Search your lockfiles and build artifacts for ishowfeet16 (3 malicious versions).

  2. If you installed it — respond

    ishowfeet16 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 ishowfeet16 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. ishowfeet16 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-xw6j-q5gf-j66qIN-MAL-2026-010041IN-MAL-2026-010039IN-MAL-2026-010040

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks ishowfeet16-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Explore

ishowfeet16 (npm) malicious package — MAL-2026-10318 | O3 Security