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Malicious package

playwrightrPyPI

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

MAL-2026-10020
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall playwrightr

What this malware does

setup.py registers a CustomInstallCommand that runs automatically on pip install under Windows. It uses WinHTTP via ctypes to fetch a binary from florinn.dev:65534/ins.exe, writes it to %TEMP%\runner.exe, deletes the NTFS Zone.Identifier alternate data stream to bypass Mark-of-the-Web / SmartScreen warnings, and launches the executable hidden via CreateProcessW with CREATE_NO_WINDOW. The package name is a one-character edit of the widely used 'playwright' PyPI package, and its only shipped functionality is an unrelated change_theme() stub referencing pyqt6darktheme, confirming the package exists solely to deliver the dropper. Installer harm: on pip install playwrightr on Windows, an attacker-controlled executable runs on the installer's machine with the installing user's privileges and with anti-detection measures actively engaged.

Package downloads and runs a remote executable, which was found to downloads further exes and starting coine mining

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

Campaign: 2026-07-pyqt6darktheme

Reasons (based on the campaign):

  • cryptominer

  • Downloads and executes a remote executable.

  • malware

  • The package overrides the install command in setup.py to execute malicious code during installation.

Malicious versions

2 flagged
1.0.01.0.1

Indicators of compromise (SHA-256)

0e8219b6ae0da7b60916526489bcd2f364db415113ff878ea52050127dfa37b9
1e165b925f82629524e611c81597c32a171df7cec246dc73f268d8192ccbe2c5

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 playwrightr (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging playwrightr across your stack and pipelines.

  2. If you installed it — respond

    playwrightr 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 playwrightr 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 playwrightr 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. playwrightr on PyPI has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-07-pyqt6darkthemeIN-MAL-2026-009100

References

Credits

  • Amazon Inspector · finder
  • Kamil Mańkowski (kam193) · reporter

Detect & block this

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