webrix-docsnpm
Malicious code in webrix-docs (npm) Remove it immediately and rotate any exposed credentials.
What this malware does
package.json declares preinstall: node index.js, which runs automatically on npm install. index.js collects host reconnaissance data — os.hostname(), os.userInfo() (username, uid, gid, homedir), process.platform, cwd, and the output of whoami/id spawned via child_process — and POSTs it as JSON to the hardcoded URL https://c7kfuaf25guwigaz6r03kxet0k6bu3is.oastify.com/detox56 (a Burp Collaborator / oastify.com out-of-band interaction subdomain). The package has an empty description and author, no library code, and a name that mimics the legitimate webrix UI library — consistent with a typosquat/dependency-confusion lure whose only purpose is the install-time beacon.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for webrix-docs (version 20.2.11). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging webrix-docs across your stack and pipelines.
If you installed it — respond
webrix-docs 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 webrix-docs 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 webrix-docs 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 webrix-docs-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.