Which versions of teahy-znrpz-util are malicious?

The following npm versions of teahy-znrpz-util are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate teahy-znrpz-util if I installed it?

teahy-znrpz-util 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.

I already installed teahy-znrpz-util — how do I know if it already compromised me?

If teahy-znrpz-util 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.

Is teahy-znrpz-util part of a known attack campaign?

Yes — teahy-znrpz-util is associated with the IN-MAL-2026-022609 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find teahy-znrpz-util across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for teahy-znrpz-util (version 1.0.0).

Malicious package

teahy-znrpz-utilnpm

Advisory published Nov 11, 2026Updated Nov 11, 2026

teahy-znrpz-util is a confirmed malicious npm package (MAL-2026-19146) 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 teahy-znrpz-util (npm)

MAL-2026-19146

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall teahy-znrpz-util

What this malware does

index.js reads a numeric byte array stored under a non-standard _bz key inside package.json, decompresses it with zlib.inflateSync, and executes the resulting string via the Function constructor with require and __dirname bound in — all on module load. Execution is gated by an early-return when any of CI, GITHUB_ACTIONS, GITLAB_CI, TRAVIS, CIRCLECI, or SANDBOX environment variables are set, so the hidden code only runs on real developer or production hosts. Smuggling executable logic as a zlib blob under a private manifest key, decoding it, and running it through Function() at require time is an obfuscated-loader pattern; the package's self-description as a 'utility' does not match any behavior visible in its source. The payload executes with full Node privileges on the installer's machine as soon as the module is required.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

5d18143cb6c6ab53a6b224630d1b50f00578f4308414da4f384281a679d7861d

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for teahy-znrpz-util (version 1.0.0).
If you installed it — respond
teahy-znrpz-util 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.
Did it already run?
If teahy-znrpz-util 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. teahy-znrpz-util 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-2026-022609

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks teahy-znrpz-util-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