abuden221npm
abuden221 is a confirmed malicious npm package (MAL-2026-6130) that steals credentials and exfiltrates sensitive data (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 abuden221 (npm)
What this malware does
The tarball is a static-site / web-proxy build (index.html, /assets/*.js bundles with obfuscated names, a.well-known/discord verification file, branding) rather than a Node.js library. package.json declares main: sw.js, but sw.js is a browser ServiceWorker that calls importScripts('./8cfc2/hgshm.js') — a global that does not exist in Node, so require()-ing this package throws before any code runs. There are no preinstall/install/postinstall/prepare lifecycle hooks, no Node-reachable network I/O, credential reads, or shell execution, so installing the package does not produce installer-side harm. The bundled service worker is an Ultraviolet-style web proxy that, when deployed in a browser, injects a script into proxied HTML responses to redirect window.open / anchor clicks / form submits via postMessage — hostile to users of a deployed proxy site, not to npm installers. The tarball also ships auto-publish.sh, a loop that copies the project to a temp dir, rewrites package.json.name through 10 sequential names (ratelimitsucks, ratelimitsucks1..ratelimitsucks9), and runs npm publish --silent in parallel — registry-namespace-spam tooling. The script is not wired to any lifecycle hook and does not run on install. Obfuscated bundles under assets/ are typical for a deployed proxy frontend and do not execute in Node. Routed to human review because the package is misusing npm as static hosting and documents intent to mass-publish duplicates under sequential names; this is registry abuse worth a maintainer/registry response, but not a supply-chain attack against installers.
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
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for abuden221 (3 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging abuden221 across your stack and pipelines.
If you installed it — respond
abuden221 is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If abuden221 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 abuden221 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 abuden221-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.