Which versions of bestcolorsever2 are malicious?

The following PyPI versions of bestcolorsever2 are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate bestcolorsever2 if I installed it?

bestcolorsever2 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 bestcolorsever2 — how do I know if it already compromised me?

If bestcolorsever2 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 bestcolorsever2 part of a known attack campaign?

Yes — bestcolorsever2 is associated with the 2023-12-valuent 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 bestcolorsever2 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bestcolorsever2 (version 1.0.0).

Part of a larger attack: 2023-12-valuent published 17 malicious packages. See the full campaign →

Malicious package

bestcolorsever2PyPI

Advisory published Nov 30, 2024Updated Dec 12, 2025

bestcolorsever2 is a confirmed malicious PyPI package (MAL-2024-12216) 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 bestcolorsever2 (PyPI)

MAL-2024-12216

Immediate action

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

pip uninstall bestcolorsever2

What this malware does

Packages either test the malicious behaviour, or actually download and run a simple remote script during the installation.

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: 2023-12-valuent

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.
Downloads and executes a remote malicious script.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

dad845b52ea2334b85ac47195ffc7d373b03ccbfe5b508a3fe81268f31eaa6fc

fa4352627d3e53d9bea22f4b439c0749f5a88407f6dda914fe43ca7612c5b101

c472267013b6a18a675f5e072887fe489994e2f8a9dd9341c1e3df1c73d265ab

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for bestcolorsever2 (version 1.0.0).
If you installed it — respond
bestcolorsever2 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 bestcolorsever2 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. bestcolorsever2 on PyPI 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

2023-12-valuent

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)

Detect & block this

O3 blocks bestcolorsever2-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