Which versions of testospkg are malicious?

The following PyPI versions of testospkg are flagged malicious: 0.0.1, 0.0.2, 0.0.3. Treat any of these as compromised.

How do I remediate testospkg if I installed it?

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

If testospkg 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 testospkg part of a known attack campaign?

Yes — testospkg is associated with the RLMA-2025-01240, GENERIC-standard-pypi-install-pentest, RLUA-2026-00808 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 testospkg across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for testospkg (3 malicious versions).

Malicious package

testospkgPyPI

Advisory published Jul 26, 2024Updated Mar 19, 2026

testospkg is a confirmed malicious PyPI package (MAL-2025-1997) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.1, 0.0.2, 0.0.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in testospkg (PyPI)

MAL-2025-1997

Immediate action

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

pip uninstall testospkg

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

3 flagged

0.0.10.0.20.0.3

Indicators of compromise (SHA-256)

8037754b80149b6d2d3be95e1867d4f5b8401637539733006147968cd9920f75

9f7a507f59348115b4a92ab77584130cbbae2b627b241d8d1aecb46a81a33ba1

9e465f1b8689bea6b370d4daf187498e073715c051bea18b33f8e20f15b03e02

78a3b5dfea1aec0f6dca8f6b815cd15f98a1e78b1830c4743cb05cf060156ef8

9c9266b5bf0d3392fc9c3fd28195a5f228ceb83a736e4245ba728846206b46d5

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for testospkg (3 malicious versions).
If you installed it — respond
testospkg 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 testospkg 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. testospkg on PyPI has been identified as a malicious package (versions 0.0.1, 0.0.2, 0.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-01240GENERIC-standard-pypi-install-pentestRLUA-2026-00808

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks testospkg-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