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Part of a larger attack: @oku-ui published 43 malicious packages. See the full campaign →
Malicious package

@oku-ui/hover-cardnpm

Advisory published Updated

@oku-ui/hover-card is a confirmed malicious npm package (MAL-2025-191259) that steals credentials and exfiltrates sensitive data (malicious version 0.6.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @oku-ui/hover-card (npm)

MAL-2025-191259
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @oku-ui/hover-card

What this malware does

The package @oku-ui/hover-card was found to contain malicious code.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm. The malicious payload steals tokens and credentials and publishes them to GitHub. The worm will propogate itself to NPM packages the user owns and establish persistence is a GitHub action. The package may also destroy the user's home directory.

Malicious versions

1 flagged
0.6.2

Indicators of compromise (SHA-256)

31e39e1f24f09c1ce04a92db563625b27c3ca6e272b63cd5e216f4f92250375e
49011592cdb157147144c2972c03c4ec153b1d0076d2aa6d45dce878247a77fc

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for @oku-ui/hover-card (version 0.6.2).

  2. If you installed it — respond

    @oku-ui/hover-card 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 @oku-ui/hover-card 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. @oku-ui/hover-card on npm has been identified as a malicious package (version 0.6.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @oku-ui/hover-card-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
@oku-ui/hover-card (npm) malicious package — MAL-2025-191259 | O3 Security