ronyfortestnpm
Malicious code in ronyfortest (npm) Remove it immediately and rotate any exposed credentials.
What this malware does
The package's postinstall hook (node index.js) runs automatically on npm install and collects the installer's OS username (os.userInfo().username), hostname (os.hostname()), and working directory (process.env.INIT_CWD || process.cwd()), then POSTs them as JSON to a hardcoded webhook.site inspector URL (https://webhook.site/49781ccd-e409-4a90-8a42-34ed52b9e7b1). package.json ships empty author/description/keywords metadata and declares no legitimate purpose. The behavior is an unconditional install-time beacon that leaks installer host/user identifiers to an author-controlled inspection endpoint.
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 ronyfortest (version 99.9.9). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging ronyfortest across your stack and pipelines.
If you installed it — respond
ronyfortest 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 ronyfortest 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 ronyfortest 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 ronyfortest-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.