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Malicious package

hyperion-react-native-testappnpm

Advisory published Updated

hyperion-react-native-testapp is a confirmed malicious npm package (MAL-2025-6727) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in hyperion-react-native-testapp (npm)

MAL-2025-6727
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall hyperion-react-native-testapp

What this malware does

The package communicates with a domain associated with malicious activity.

package.json declares a preinstall lifecycle script that runs wget at npm install time, sending the installer's username ($(whoami)), current working directory ($(pwd)), and hostname ($(hostname)) as URL query parameters to a hardcoded webhook.site collector (https://webhook.site/c4919b2f-dd76-4a2f-adca-2f052bc8ff0e/). This fires unconditionally on npm install without user consent and delivers installer identity/environment data to a third-party collector controlled by whoever created the webhook. The package name pattern and beacon shape are consistent with a dependency-confusion proof-of-concept, but the exfiltration behavior is real regardless of intent.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

09dade0de8238a15a0ae8541c47a5178f3234eb654cc6afe58eaf02600ad4d47

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for hyperion-react-native-testapp (version 1.0.0).

  2. If you installed it — respond

    hyperion-react-native-testapp 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.

  3. Did it already run?

    If hyperion-react-native-testapp 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. hyperion-react-native-testapp on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-018696

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks hyperion-react-native-testapp-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database
hyperion-react-native-testapp (npm) malicious package — MAL-2025-6727 | O3 Security