Which versions of bytesp are malicious?

The following PyPI versions of bytesp are flagged malicious: 99.7. Treat any of these as compromised.

How do I remediate bytesp if I installed it?

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

If bytesp 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 bytesp part of a known attack campaign?

Yes — bytesp is associated with the 2024-11-byted-dast 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 bytesp across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bytesp (version 99.7).

Part of a larger attack: 2024-11-byted-dast published 183 malicious packages. See the full campaign →

Malicious package

bytespPyPI

Advisory published Nov 6, 2024Updated Dec 12, 2025

bytesp is a confirmed malicious PyPI package (MAL-2024-10412) that steals credentials and exfiltrates sensitive data (malicious version 99.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bytesp (PyPI)

MAL-2024-10412

Immediate action

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

pip uninstall bytesp

What this malware does

A campaign of probably pentest packages flooding PYPI. Installing the package or importing the module triggers reporting basic info like hostname, path and the username to the package author. There is no other purpose of the package.

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: 2024-11-byted-dast

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.
typosquatting
dependency-confusion

The OpenSSF Package Analysis project identified 'bytesp' @ 99.7 (pypi) as malicious.

It is considered malicious because:

The package communicates with a domain associated with malicious activity.

Malicious versions

1 flagged

99.7

Indicators of compromise (SHA-256)

cfe1033392815abccdd140894af162900e86f8ec9d1c7186a3b2af08866cfdb4

3f5cfc45299830b1eec5ac7fe2b2a06171fb1ee790aab1d3a86795f86e5e10ae

ddcbb6dd1dd58abad76edbd33cb16d40223a2a4da723c3998bdf83d639d2de8f

c20ae9b2319d416b6b990420cbc395af63a01f2f74a1069466440b9da2c4cf2a

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for bytesp (version 99.7).
If you installed it — respond
bytesp 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 bytesp 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. bytesp on PyPI has been identified as a malicious package (version 99.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2024-11-byted-dast

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks bytesp-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