Mach-O Header Fields

macho.go_import_hash

A hash of the Go language imports in a Mach-O file excluding standard library imports. An import hash can be used to fingerprint binaries even after recompilation or other code-level transformations have occurred, which would change more traditional hash values.

The algorithm used to calculate the Go symbol hash and a reference implementation are available [here](https://github.com/elastic/toutoumomoma).

type: keyword

example: 10bddcb4cee42080f76c88d9ff964491

extended

macho.go_imports

List of imported Go language element names and types.

type: flattened

extended

macho.go_imports_names_entropy

Shannon entropy calculation from the list of Go imports.

type: long

extended

macho.go_imports_names_var_entropy

Variance for Shannon entropy calculation from the list of Go imports.

type: long

extended

macho.go_stripped

Set to true if the file is a Go executable that has had its symbols stripped or obfuscated and false if an unobfuscated Go executable.

type: boolean

extended

macho.import_hash

A hash of the imports in a Mach-O file. An import hash can be used to fingerprint binaries even after recompilation or other code-level transformations have occurred, which would change more traditional hash values.

This is a synonym for symhash.

type: keyword

example: d41d8cd98f00b204e9800998ecf8427e

extended

macho.imports

List of imported element names and types.

type: flattened

Note: this field should contain an array of values.

extended

macho.imports_names_entropy

Shannon entropy calculation from the list of imported element names and types.

type: long

extended

macho.imports_names_var_entropy

Variance for Shannon entropy calculation from the list of imported element names and types.

type: long

extended

macho.sections

An array containing an object for each section of the Mach-O file.

The keys that should be present in these objects are defined by sub-fields underneath macho.sections.*.

type: nested

Note: this field should contain an array of values.

extended

macho.sections.entropy

Shannon entropy calculation from the section.

type: long

extended

macho.sections.name

Mach-O Section List name.

type: keyword

extended

macho.sections.physical_size

Mach-O Section List physical size.

type: long

extended

macho.sections.var_entropy

Variance for Shannon entropy calculation from the section.

type: long

extended

macho.sections.virtual_size

Mach-O Section List virtual size. This is always the same as physical_size.

type: long

extended

macho.symhash

A hash of the imports in a Mach-O file. An import hash can be used to fingerprint binaries even after recompilation or other code-level transformations have occurred, which would change more traditional hash values.

This is a Mach-O implementation of the Windows PE imphash

type: keyword

example: d3ccf195b62a9279c3c19af1080497ec

extended