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Malicious package

unicocheck-iosnpm

Advisory published Updated

unicocheck-ios is a confirmed malicious npm package (MAL-2026-5831) that steals credentials and exfiltrates sensitive data (malicious version 9.9.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in unicocheck-ios (npm)

MAL-2026-5831
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall unicocheck-ios

What this malware does

package.json declares a preinstall lifecycle script that runs curl against https://webhook.site/fe1246c2-ac04-4493-b223-fe34ba26b79f with query parameters carrying the installer's hostname, username ($(whoami)), current working directory, OS uname output, and HOME path. This fires automatically on npm install before any user code runs, leaking host identifiers and environment context to a third-party webhook capture endpoint controlled by the publisher. The package metadata (name unicocheck-ios, description Unico Check iOS SDK - biometric identity verification, version 9.9.9) impersonates the Unico vendor's iOS SDK and uses the canonical dependency-confusion sentinel version, indicating the package is positioned to win resolution against an internal package name and harvest data from build environments that mistakenly fetch it from the public registry.

The OpenSSF Package Analysis project identified 'unicocheck-ios' @ 9.9.9 (npm) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged
9.9.9

Indicators of compromise (SHA-256)

bafc91c569cf42c5f1ff68531a8d5238919f595368ffa90b7d4e5bcc74fe9788
05ebccc546e1450dad339a76440193233639cd77d9a761ae76f1db67e0e2be7b

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for unicocheck-ios (version 9.9.9).

  2. If you installed it — respond

    unicocheck-ios 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 unicocheck-ios 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. unicocheck-ios on npm has been identified as a malicious package (version 9.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-006696

References

Credits

  • Amazon Inspector · finder
  • OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks unicocheck-ios-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

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unicocheck-ios (npm) malicious package — MAL-2026-5831 | O3 Security