2022-11-12 23:18:06 +01:00
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# Portable Executable
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* [Windows PE doc](https://docs.microsoft.com/en-us/windows/win32/debug/pe-format)
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* An executable binary in the windows world
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The file format consists of
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* PE Header
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* Data Sections
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2022-12-22 17:30:06 +01:00
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## Headers
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1. IMAGE_DOS_HEADER, 0x00 to 0x63 of the binary
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* `e_magic` as the Magic Bytes: 'MZ' -> 0x4D5A (0x5A4D in little endian)
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* `e_lfanew` contains the starting offset of `IMAGE_NT_HEADERS`
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2. DOS_STUB
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* Contains `!This program cannot be run in DOS mode`
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3. .ntdata
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3. FILE_HEADER
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4. OPTIONAL_HEADER
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5. IMAGE_SECTION_HEADER
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6. IMAGE_NT_HEADERS
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* NT_HEADERS
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* Signature
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* FILE_HEADER
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* OPTIONAL_HEADER
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2022-11-12 23:18:06 +01:00
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## Data Section
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The data section consists of
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* __.text__, program code
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* __.data__, initialized variables
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* __.bss__, unanitialized variables
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* __.edata__, exportable objects and related table info
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* __.idata__, imported objects and related table info
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* __.reloc__, image relocation info
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* __.rsrc__, links external resources, e.g. icons, images, manifests
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## Starting a PE
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If a process starts, the PE is read in the following order
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1. Header sections
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* File signatue is __MZ__, and magic number are read
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* Architecture of the platform
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* timestamp
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2. Section table details is parsed
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3. Content is mapped into memory based on
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* Entry point address and offset of ImageBase
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* Relative Virtual Address (RVA), addresses related to Imagebase
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4. Libraries and imports are loaded
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5. Entrypoint address of the main function is run
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2022-12-22 17:30:06 +01:00
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## Tools
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[pe-tree](https://github.com/blackberry/pe_tree)
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