Open PE File

Portable Executable (PE) format is a file format designed for Windows operating systems. Often used in .EXE or .DLL files, this format is used for executables, object code, and DLLs, in the NT family of Windows operating systems. The structure provides the information necessary for the Windows loader to manage the wrapped executable code, enabling loading and execution.

Portable Executable Formats

A PE file begins with a small MS-DOS executable stub, allowing the file to print out an error message if an attempt is made to run it in MS-DOS. The PE format also has a COFF (Common Object File Format), which provides basic information about the executable.

Few commonly seen formats of PE files include .EXE (executable), .DLL (Dynamic Link Libraries), .SYS (Windows Drivers), .OCX (OLE Control Extension), and .SCR (Screen Saver).

Opening PE Files

PE files are not designed to be opened manually by the user. Instead, when an application runs, the operating system automatically opens, reads, and executes the PE file. However, certain programs such as Ghidra, IDA Pro, or WinDbg can open PE files for debugging and development purposes.

Using PE Files

As mentioned, PE files are automatically used by the operating system when an application runs. Developers, however, use PE files when debugging an application or developing new software.

Some programs such as PEfile or PyInstaller are used to create PE files. These tools convert Python scripts into standalone executables that work on any computer with a compatible operating system.

PE File Important Information

A key point to remember about PE files is that they should not be opened manually unless you understand the file's purpose and have the necessary knowledge to handle these files. Accidentally running a malicious PE file can lead to serious issues, including data loss or system damage.

It's also important to regularly update your antivirus software, which can check the safety of PE files before they're opened or executed by your operating system. Trustworthy resources like Microsoft's official documentation can provide further information about the structure and handling of PE files.