Microsoft hides file extensions in Windows by default even though it's a security risk that is commonly abused by phishing emails and malware distributors to trick people into opening malicious files.

Researchers from CA have intercepted a new ransomware variant encrypting popular file extensions (.zip; .rar; .pdf; .rtf; .txt; .jpg; .jpeg; .waw; .mp3; .db; .xls ...

Hackers are targeting Windows machines using the ZIP file concatenation technique to deliver malicious payloads in compressed archives without security solutions detecting them. The technique exploits ...