Avoid opening the file or its contents until you have verified its origin.

Flooding your browser with fake virus warnings and intrusive pop-ups.

If you still need to see what is inside without risking your system:

If you have already downloaded it, run a full scan using trusted tools like Malwarebytes or Windows Defender.

Open the file within a virtual machine or a dedicated sandbox environment (like Any.Run ) to see its behavior without affecting your actual computer.

Providing the source (e.g., a specific website or a message) can help determine if it's a known threat. Fake 7-Zip downloads are turning home PCs into proxy nodes

Some fake installers silently turn your PC into a proxy for other network traffic.

Be wary if the ZIP contains file types like .exe , .bat , .msi , or .js , as these are common methods for delivering trojans. Typical "Promo" File Risks Malicious ZIP files named after "promos" often lead to: