Which versions of myhexsender are malicious?

The following PyPI versions of myhexsender are flagged malicious: 0.1.0. Treat any of these as compromised.

How do I remediate myhexsender if I installed it?

myhexsender 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 myhexsender — how do I know if it already compromised me?

If myhexsender 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 myhexsender part of a known attack campaign?

Yes — myhexsender is associated with the GENERIC-standard-pypi-install-pentest 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 myhexsender across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for myhexsender (version 0.1.0).

Malicious package

myhexsenderPyPI

Advisory published Jul 26, 2024Updated Dec 12, 2025

myhexsender is a confirmed malicious PyPI package (MAL-2024-12310) that steals credentials and exfiltrates sensitive data (malicious version 0.1.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in myhexsender (PyPI)

MAL-2024-12310

Immediate action

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

pip uninstall myhexsender

What this malware does

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
The package overrides the install command in setup.py to execute malicious code during installation.

Malicious versions

1 flagged

0.1.0

Indicators of compromise (SHA-256)

d2515c34bd9ca9ed0b658fd5247aee4d851383e00c6954e02077c581a6f2fe5e

551ca9f26ea50e6190623b0bc30ab6836e3d0746d1982d5c28c1b5e0daf914db

25e8e6d55820114610d420834fa3db9a18e49cb568ee71781fba1bcb7f0e9e56

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for myhexsender (version 0.1.0).
If you installed it — respond
myhexsender 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 myhexsender 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. myhexsender on PyPI has been identified as a malicious package (version 0.1.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentest

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)

Detect & block this

O3 blocks myhexsender-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