Which versions of expect-tests are malicious?

The following PyPI versions of expect-tests are flagged malicious: 99.99.99. Treat any of these as compromised.

How do I remediate expect-tests if I installed it?

expect-tests 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 expect-tests — how do I know if it already compromised me?

If expect-tests 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 expect-tests part of a known attack campaign?

Yes — expect-tests is associated with the IN-MAL-2026-022564, 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 expect-tests across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for expect-tests (version 99.99.99).

Malicious package

expect-testsPyPI

Advisory published Nov 8, 2026Updated Nov 8, 2026

expect-tests is a confirmed malicious PyPI package (MAL-2026-18760) that steals credentials and exfiltrates sensitive data (malicious version 99.99.99). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in expect-tests (PyPI)

MAL-2026-18760

Immediate action

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

pip uninstall expect-tests

What this malware does

setup.py and gcp_log_poc/init.py read the installer's hostname via platform.node() and encode it into a subdomain of testa213022.dssldrf.net, then invoke socket.getaddrinfo() to trigger DNS resolution to that domain's authoritative server. This causes the installer's hostname to be exfiltrated to a non-first-party DNS server both when pip builds/installs the package (setup.py) and whenever the installed module is imported. The destination domain is unrelated to any legitimate purpose declared by the package, the package name (expect-tests) and the imported module name (gcp_log_poc) do not match, and the behavior is undisclosed. The 99.99.99 version number and name-vs-module mismatch are consistent with a dependency-confusion / name-squat lure.

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

99.99.99

Indicators of compromise (SHA-256)

f693b92cac909344a9cbab93f5f80ab6d820759af5042d323d90f10351d39d76

a39f8a715e51027cca924163b2f9da3864a4f21a1707f9936e658058ddde5f4a

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for expect-tests (version 99.99.99).
If you installed it — respond
expect-tests 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 expect-tests 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. expect-tests on PyPI has been identified as a malicious package (version 99.99.99 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-022564GENERIC-standard-pypi-install-pentest

References

Credits

Amazon Inspector · finder
Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks expect-tests-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