Base64 (used by attackers to bypass simple string-based security filters and email scanners). Likely Category: Malware / Phishing Attachment . Threat Assessment
Typically delivered as an email attachment or a link in a phishing message. QXZlcmFnZVBlcnY=.zip
If the file was executed, assume your local credentials are compromised. Change critical passwords (email, banking) from a different, clean device . Base64 (used by attackers to bypass simple string-based
Permanently delete the file from your system and empty the trash. banking) from a different
Investigate your Startup folders and Task Scheduler for any unrecognized entries created around the time the file was downloaded.
Use an updated antivirus or EDR (Endpoint Detection and Response) solution to scan your machine for any residual artifacts.