FOCA is a tool that extracts metadata, hidden information, and lost data from documents and files. It can discover details about users, operating systems, printers, paths, servers, and more. FOCA also performs network discovery by analyzing DNS records, web servers, and shared resources. It provides different views of the extracted information for security assessments. The tool is regularly updated with new capabilities like internal network scanning, digital certificate analysis, and a reporting module. FOCA extracts intelligence from file metadata that can reveal sensitive organizational information and vulnerabilities.