ELF64 stands for Executable and Linkable Format 64-bit, which is a file format used by Linux and Unix-like operating systems for executable files, object code, shared libraries, and core dumps. It is the 64-bit extension of the original ELF format, enabling support for modern 64-bit processors and larger memory addressing. ELF64 files contain headers and segments that describe how the operating system should load and execute the program. This format is widely used due to its flexibility, extensibility, and ability to support advanced features such as dynamic linking and position-independent code. Developers and security professionals often analyze ELF64 files to understand program behavior or detect malware.