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ELF Header Fields

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ELF Header Fields

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These fields contain Linux Executable Linkable Format (ELF) metadata.

These fields are in beta and are subject to change.

ELF Header Field Details

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Field	Description	Level
elf.architecture	Machine architecture of the ELF file. type: keyword example: `x86-64`	extended
elf.byte_order	Byte sequence of ELF file. type: keyword example: `Little Endian`	extended
elf.cpu_type	CPU type of the ELF file. type: keyword example: `Intel`	extended
elf.creation_date	Extracted when possible from the file’s metadata. Indicates when it was built or compiled. It can also be faked by malware creators. type: date	extended
elf.exports	List of exported element names and types. type: flattened Note: this field should contain an array of values.	extended
elf.go_import_hash	A hash of the Go language imports in an ELF 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
elf.go_imports	List of imported Go language element names and types. type: flattened	extended
elf.go_imports_names_entropy	Shannon entropy calculation from the list of Go imports. type: long	extended
elf.go_imports_names_var_entropy	Variance for Shannon entropy calculation from the list of Go imports. type: long	extended
elf.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
elf.header.abi_version	Version of the ELF Application Binary Interface (ABI). type: keyword	extended
elf.header.class	Header class of the ELF file. type: keyword	extended
elf.header.data	Data table of the ELF header. type: keyword	extended
elf.header.entrypoint	Header entrypoint of the ELF file. type: long	extended
elf.header.object_version	"0x1" for original ELF files. type: keyword	extended
elf.header.os_abi	Application Binary Interface (ABI) of the Linux OS. type: keyword	extended
elf.header.type	Header type of the ELF file. type: keyword	extended
elf.header.version	Version of the ELF header. type: keyword	extended
elf.import_hash	A hash of the imports in an ELF 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 an ELF implementation of the Windows PE imphash. type: keyword example: `d41d8cd98f00b204e9800998ecf8427e`	extended
elf.imports	List of imported element names and types. type: flattened Note: this field should contain an array of values.	extended
elf.imports_names_entropy	Shannon entropy calculation from the list of imported element names and types. type: long	extended
elf.imports_names_var_entropy	Variance for Shannon entropy calculation from the list of imported element names and types. type: long	extended
elf.sections	An array containing an object for each section of the ELF file. The keys that should be present in these objects are defined by sub-fields underneath `elf.sections.*`. type: nested Note: this field should contain an array of values.	extended
elf.sections.chi2	Chi-square probability distribution of the section. type: long	extended
elf.sections.entropy	Shannon entropy calculation from the section. type: long	extended
elf.sections.flags	ELF Section List flags. type: keyword	extended
elf.sections.name	ELF Section List name. type: keyword	extended
elf.sections.physical_offset	ELF Section List offset. type: keyword	extended
elf.sections.physical_size	ELF Section List physical size. type: long	extended
elf.sections.type	ELF Section List type. type: keyword	extended
elf.sections.var_entropy	Variance for Shannon entropy calculation from the section. type: long	extended
elf.sections.virtual_address	ELF Section List virtual address. type: long	extended
elf.sections.virtual_size	ELF Section List virtual size. type: long	extended
elf.segments	An array containing an object for each segment of the ELF file. The keys that should be present in these objects are defined by sub-fields underneath `elf.segments.*`. type: nested Note: this field should contain an array of values.	extended
elf.segments.sections	ELF object segment sections. type: keyword	extended
elf.segments.type	ELF object segment type. type: keyword	extended
elf.shared_libraries	List of shared libraries used by this ELF object. type: keyword Note: this field should contain an array of values.	extended
elf.telfhash	telfhash symbol hash for ELF file. type: keyword	extended

Field Reuse

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The elf fields are expected to be nested at:

file.elf
process.elf

Note also that the elf fields are not expected to be used directly at the root of the events.

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