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Malicious package

windowsrequirPyPI

Malicious code in windowsrequir (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2025-191665
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall windowsrequir

What this malware does

Package downloads and runs an obfuscated bat file, which executes malicious activity according to VirusTotal results.

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

Campaign: 2025-10-windowsrequir

Reasons (based on the campaign):

  • impersonation

  • Downloads and executes a remote malicious script.

  • malware

Malicious versions

1 flagged
1.0.2

Indicators of compromise (SHA-256)

b2d199a1a33df939f3accf1d9998b81056910cf2364c567bfbbcd305c9533a2e
ec04476a65a75afba7dec1ff16b538a6c135a5a67b55b0396fe84bc24572e0da
8b1e2404307bae09dee3c7fe01e272b488ca2da014d14ad2a740ed76c89634e8
35e487286749e88376e5ea97f5897b7bb9a4b8b294447c5582ffea2be510b0e8

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for windowsrequir (version 1.0.2). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging windowsrequir across your stack and pipelines.

  2. If you installed it — respond

    windowsrequir 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.

  3. Did it already run?

    If windowsrequir 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.

  4. How O3 protects you

    O3 blocks windowsrequir 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. windowsrequir on PyPI has been identified as a malicious package (version 1.0.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-056432025-10-windowsrequirRLUA-2026-00931

References

Credits

  • Kamil Mańkowski (kam193)
  • ReversingLabs · finder

Detect & block this

O3 blocks windowsrequir-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

windowsrequir (PyPI) malicious package — MAL-2025-191665 | O3 Security