ida pro

The Interactive Disassembler (IDA) is a disassembler for computer software which generates assembly language source code from machine-executable code. It supports a variety of executable formats for different processors and operating systems. It can also be used as a debugger for Windows PE, Mac OS X Mach-O, and Linux ELF executables. A decompiler plug-in, which generates a high level, C source code-like representation of the analysed program, is available at extra cost.
IDA is used widely in software reverse engineering, including for malware analysis and software vulnerability research. IDA's decompiler is one of the most popular and widely used decompilation frameworks, and IDA has been called the "de-facto industry standard" for program disassembly and static binary analysis.