File transfer information

Events pertaining to file transfers through HTTP, FTP, and SMP protocols.

These events belong to the file-xfer metaclass.

The filename field is used in Trellix rules and analytics. The md5,sha1, and sha256 fields are used in intel matching.

Taxonomy	Type	Description
`filename`	string	File name or path
`filepath`	string	File path
`hash`	string	Any type of message digest hash value
`md5`	string	MD5 hash value
`sha1`	string	SHA1 hash value
`sha256`	string	SHA256 hash value
`size`	string	File size