ECS Field Reference
ECS 8.17
Email
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Email

Describes an email transaction.

Fields

Field Summary

FieldTypeLevelDescription
email.attachmentsnestedExtendedList of objects describing the attachments.
email.attachments.file.extensionkeywordExtendedAttachment file extension.
email.attachments.file.hash.cdhashkeywordExtendedThe Code Directory (CD) hash of an executable.
email.attachments.file.hash.md5keywordExtendedMD5 hash.
email.attachments.file.hash.sha1keywordExtendedSHA1 hash.
email.attachments.file.hash.sha256keywordExtendedSHA256 hash.
email.attachments.file.hash.sha384keywordExtendedSHA384 hash.
email.attachments.file.hash.sha512keywordExtendedSHA512 hash.
email.attachments.file.hash.ssdeepkeywordExtendedSSDEEP hash.
email.attachments.file.hash.tlshkeywordExtendedTLSH hash.
email.attachments.file.mime_typekeywordExtendedMIME type of the attachment file.
email.attachments.file.namekeywordExtendedName of the attachment file.
email.attachments.file.sizelongExtendedAttachment file size.
email.bcc.addresskeywordExtendedEmail address of BCC recipient
email.cc.addresskeywordExtendedEmail address of CC recipient
email.content_typekeywordExtendedMIME type of the email message.
email.delivery_timestampdateExtendedDate and time when message was delivered.
email.directionkeywordExtendedDirection of the message.
email.from.addresskeywordExtendedThe sender's email address.
email.local_idkeywordExtendedUnique identifier given by the source.
email.message_idwildcardExtendedValue from the Message-ID header.
email.origination_timestampdateExtendedDate and time the email was composed.
email.reply_to.addresskeywordExtendedAddress replies should be delivered to.
email.sender.addresskeywordExtendedAddress of the message sender.
email.subjectkeywordExtendedThe subject of the email message.
email.subject.textmatch_only_textExtendedThe subject of the email message.
email.to.addresskeywordExtendedEmail address of recipient
email.x_mailerkeywordExtendedApplication that drafted email.

Field Details

email.attachments

Type: nested

Level: Extended

Description: List of objects describing the attachments.

Normalization: array

Indexed: true

email.attachments.file.extension

Type: keyword

Level: Extended

Description: Attachment file extension.

Example: txt

Indexed: true

email.attachments.file.hash.cdhash

Type: keyword

Level: Extended

Description: The Code Directory (CD) hash of an executable.

Example: 3783b4052fd474dbe30676b45c329e7a6d44acd9

Indexed: true

email.attachments.file.hash.md5

Type: keyword

Level: Extended

Description: MD5 hash.

Indexed: true

email.attachments.file.hash.sha1

Type: keyword

Level: Extended

Description: SHA1 hash.

Indexed: true

email.attachments.file.hash.sha256

Type: keyword

Level: Extended

Description: SHA256 hash.

Indexed: true

email.attachments.file.hash.sha384

Type: keyword

Level: Extended

Description: SHA384 hash.

Indexed: true

email.attachments.file.hash.sha512

Type: keyword

Level: Extended

Description: SHA512 hash.

Indexed: true

email.attachments.file.hash.ssdeep

Type: keyword

Level: Extended

Description: SSDEEP hash.

Indexed: true

email.attachments.file.hash.tlsh

Type: keyword

Level: Extended

Description: TLSH hash.

Indexed: true

email.attachments.file.mime_type

Type: keyword

Level: Extended

Description: MIME type of the attachment file.

Example: text/plain

Indexed: true

email.attachments.file.name

Type: keyword

Level: Extended

Description: Name of the attachment file.

Example: attachment.txt

Indexed: true

email.attachments.file.size

Type: long

Level: Extended

Description: Attachment file size.

Example: 64329

Indexed: true

email.bcc.address

Type: keyword

Level: Extended

Description: Email address of BCC recipient

Example: [email protected]

Normalization: array

Indexed: true

email.cc.address

Type: keyword

Level: Extended

Description: Email address of CC recipient

Example: [email protected]

Normalization: array

Indexed: true

email.content_type

Type: keyword

Level: Extended

Description: MIME type of the email message.

Example: text/plain

Indexed: true

email.delivery_timestamp

Type: date

Level: Extended

Description: Date and time when message was delivered.

Example: 2020-11-10T22:12:34.8196921Z

Indexed: true

email.direction

Type: keyword

Level: Extended

Description: Direction of the message.

Example: inbound

Indexed: true

email.from.address

Type: keyword

Level: Extended

Description: The sender's email address.

Example: [email protected]

Normalization: array

Indexed: true

email.local_id

Type: keyword

Level: Extended

Description: Unique identifier given by the source.

Example: c26dbea0-80d5-463b-b93c-4e8b708219ce

Indexed: true

email.message_id

Type: wildcard

Level: Extended

Description: Value from the Message-ID header.

Example: [email protected]

Indexed: true

email.origination_timestamp

Type: date

Level: Extended

Description: Date and time the email was composed.

Example: 2020-11-10T22:12:34.8196921Z

Indexed: true

email.reply_to.address

Type: keyword

Level: Extended

Description: Address replies should be delivered to.

Example: [email protected]

Normalization: array

Indexed: true

email.sender.address

Type: keyword

Level: Extended

Description: Address of the message sender.

Indexed: true

email.subject

Type: keyword

Level: Extended

Description: The subject of the email message.

Example: Please see this important message.

Indexed: true

email.subject.text

Type: match_only_text

Level: Extended

Description: The subject of the email message.

Example: Please see this important message.

Indexed: true

email.to.address

Type: keyword

Level: Extended

Description: Email address of recipient

Example: [email protected]

Normalization: array

Indexed: true

email.x_mailer

Type: keyword

Level: Extended

Description: Application that drafted email.

Example: Spambot v2.5

Indexed: true