When decoded, the PowerShell command did three things:

If you have encountered this file, avoid extracting or executing it. Run a Full Scan: Use an updated antivirus or a specialized tool like Malwarebytes to scan your entire system. Check Task Manager:

Wait, but the user wrote "malignant.7z" without any extra context. They might not have any malicious intent themselves but received the file from an untrusted source or generated it through some process. I should make sure to emphasize security checks, like scanning with antivirus software before extraction, since .7z archives can contain malware.