VxSig is a tool and library developed by Google LLC that automatically generates antivirus byte signatures from sets of similar binaries. The tool processes files generated by BinExport and BinDiff to create signatures compatible with Yara and ClamAV detection engines. The tool analyzes binary files to identify common patterns and characteristics that can be used for malware detection. It works by comparing similar binaries and extracting distinctive byte sequences that can serve as reliable indicators for threat identification. VxSig has been utilized at Google for malware detection and threat scanning operations. The tool supports signature generation for two major detection formats: Yara rules for advanced pattern matching and ClamAV signatures for traditional antivirus scanning. The tool integrates with existing binary analysis workflows that use BinExport and BinDiff, making it suitable for organizations already using these Google-developed reverse engineering tools. VxSig processes the output from these tools to automatically create detection signatures without manual signature writing.