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Malicious package

ronyfortestnpm

Advisory published Updated

ronyfortest is a confirmed malicious npm package (MAL-2026-7002) that opens a backdoor for remote access (malicious version 99.9.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ronyfortest (npm)

MAL-2026-7002
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall ronyfortest

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

1 flagged
99.9.9

Indicators of compromise (SHA-256)

8c9f63368f7e1147ade261a87f45e32e13bcf79b5336efad59087ce85e64a849

Detection & response playbook

Backdoor / remote access
  1. Find it

    Search your lockfiles and build artifacts for ronyfortest (version 99.9.9).

  2. 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.

  3. Did it already run?

    If ronyfortest 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. ronyfortest on npm has been identified as a malicious package (version 99.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-008103

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.

Explore

ronyfortest (npm) malicious package — MAL-2026-7002 | O3 Security