: If you are not a researcher, the safest action is to permanently delete the file and run a full system scan with a reputable antivirus like Microsoft Defender or Malwarebytes.
: If you have downloaded it, do not extract the contents.
: A small file that, when unzipped, expands into petabytes of data, intended to crash the recipient's computer or server.
: You can upload the file (or the URL where you found it) to VirusTotal to see if it triggers detections from major antivirus engines.
: Many .zip files distributed in gaming or "leaks" communities contain Infostealers (like RedLine or Lumma) designed to grab browser passwords, cookies, and crypto wallets.