Which versions of hello-world-test-mh3 are malicious?

The following PyPI versions of hello-world-test-mh3 are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate hello-world-test-mh3 if I installed it?

hello-world-test-mh3 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 hello-world-test-mh3 — how do I know if it already compromised me?

If hello-world-test-mh3 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is hello-world-test-mh3 part of a known attack campaign?

Yes — hello-world-test-mh3 is associated with the RLMA-2026-05387, IN-MAL-2026-013148 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 hello-world-test-mh3 across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for hello-world-test-mh3 (version 0.0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging hello-world-test-mh3 across your stack and pipelines.

Malicious package

hello-world-test-mh3PyPI

hello-world-test-mh3 is a confirmed malicious PyPI package (MAL-2026-10908) that steals credentials and exfiltrates sensitive data (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in hello-world-test-mh3 (PyPI)

MAL-2026-10908

Immediate action

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

pip uninstall hello-world-test-mh3

What this malware does

Package is a trivial hello-world test artifact. setup.py contains an exec(base64.b64decode(...)) call at install time, but the decoded payload is a single print() statement with no network, filesystem, or credential side effects. src/hello_world/init.py defines a _remote_update() function whose urlopen+exec branch is guarded by a constant _SIMULATE_ONLY=True, making the network-fetch-and-exec branch statically unreachable; the reachable branch only execs a local print string. No outbound network occurs, no installer secrets are read, and no attacker-controlled code or destination is referenced. The exec+base64 and import-time fetch-and-exec shapes are present as structural patterns only, with no installer-side harm.

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

08712dd08827b6758605078d00141531143487093dfd34c30b01c0555c5ee399

876b02450317c42447a25bd7f858fab9b44469580c662fbf4cd48ebf7a299edd

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for hello-world-test-mh3 (version 0.0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging hello-world-test-mh3 across your stack and pipelines.
If you installed it — respond
hello-world-test-mh3 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 hello-world-test-mh3 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks hello-world-test-mh3 before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. hello-world-test-mh3 on PyPI has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-05387IN-MAL-2026-013148

References

pypi.org

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks hello-world-test-mh3-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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