Which versions of pywin-simple-gui are malicious?

The following PyPI versions of pywin-simple-gui are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate pywin-simple-gui if I installed it?

pywin-simple-gui 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 pywin-simple-gui — how do I know if it already compromised me?

If pywin-simple-gui was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is pywin-simple-gui part of a known attack campaign?

Yes — pywin-simple-gui is associated with the 2026-02-pywin-simple-gui 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 pywin-simple-gui across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for pywin-simple-gui (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pywin-simple-gui across your stack and pipelines.

Malicious package

pywin-simple-guiPyPI

Malicious code in pywin-simple-gui (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-933

Immediate action

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

pip uninstall pywin-simple-gui

What this malware does

The package pretends to be a development helper but, in fact, downloads a remote executable. Dynamic analysis reveals actions like disabling Windows Defender and interest in cryptocurrencies as well as using Telegram as C2.

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

Campaign: 2026-02-pywin-simple-gui

Reasons (based on the campaign):

impersonation
Downloads and executes a remote executable.
modify-system-without-consent
crypto-related

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

43b40c0dbbbc187822a28a401194873adc73d13e531f2789c4227374f7ec9e26

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for pywin-simple-gui (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pywin-simple-gui across your stack and pipelines.
If you installed it — respond
pywin-simple-gui 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 pywin-simple-gui was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks pywin-simple-gui before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. pywin-simple-gui 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

2026-02-pywin-simple-gui

References

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks pywin-simple-gui-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