Which versions of hooktest-fin are malicious?

The following PyPI versions of hooktest-fin are flagged malicious: 0.1.1. Treat any of these as compromised.

How do I remediate hooktest-fin if I installed it?

hooktest-fin 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 hooktest-fin — how do I know if it already compromised me?

If hooktest-fin 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 hooktest-fin part of a known attack campaign?

Yes — hooktest-fin is associated with the 2025-11-hooktest1 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 hooktest-fin across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for hooktest-fin (version 0.1.1).

Malicious package

hooktest-finPyPI

Advisory published Dec 21, 2025Updated Dec 21, 2025

hooktest-fin is a confirmed malicious PyPI package (MAL-2025-192685) that steals credentials and exfiltrates sensitive data (malicious version 0.1.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in hooktest-fin (PyPI)

MAL-2025-192685

Immediate action

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

pip uninstall hooktest-fin

What this malware does

During installation, a script to execute remote commands through a Discord bot is installed, ensuring its persistence over reboots

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-11-hooktest1

Reasons (based on the campaign):

The package overrides the install command in setup.py to execute malicious code during installation.
The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.
rat

Malicious versions

1 flagged

0.1.1

Indicators of compromise (SHA-256)

87e6fba5c0ac4b5359cb360a5dbf68404d0b8559bd94a9f4c33fdad09559b241

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for hooktest-fin (version 0.1.1).
If you installed it — respond
hooktest-fin 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 hooktest-fin 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. hooktest-fin on PyPI has been identified as a malicious package (version 0.1.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-11-hooktest1

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks hooktest-fin-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