Sublime-Message-mailbox

2 attribute groups in the mailbox section of the Sublime Message Data Model. Each is addressed by its dotted attribute path, not a numbered event.

Attribute groupDescription
mailboxMessage Data Model attribute: mailbox
mailbox.emailMessage Data Model attribute: mailbox.email

mailbox

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Section
Sublime-Message-mailbox

Description

Message Data Model attribute: mailbox

Fields #

NameDescription
display_nameDisplay name
first_nameFirst name (given name) of the mailbox owner
last_nameLast name (surname) of the mailbox owner

Detection Rules #

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Sublime MQL #

Show 3 more (6 total)
  • VIP / Executive impersonation (strict match, untrusted) source high: Sender display name matches the display name of a user in the $org_vips list, and the sender has never been seen before. The $org_vips list must first be manually connected to a VIP group of your upstream provider (Google Workspace and Microsoft 365 only) in order for this rule to work. Once connected, the list will be automatically synced and kept up-to-date. For more information, see the $org_vips documentation: https://docs.sublimesecurity.com/docs/configure-org_vips-list This rule is recommended to be used on a relatively small list of VIPs, and is meant to reduce attack surface by detecting any message that matches the protected list of display names from a first-time or unsolicited sender. Additional rule logic can be added to look for suspicious subjects, suspicious links, etc.
  • VIP local_part impersonation from unsolicited sender source high: This rule identifies potential impersonation attempts involving the local part of an $org_vip email address. Specifically, it checks for cases where the local part of an $org_vip email (e.g., local_part@domain.com) appears with a different domain (e.g., local_part@foreigndomain.com). Additionally, the rule flags messages that match an $org_vip address exactly but fail authentication.
  • VIP / Executive impersonation in subject (untrusted) source medium: Sender subject contains the display name of a user in the $org_vips list, and the sender has never been seen before. The $org_vips list must first be manually connected to a VIP group of your upstream provider (Google Workspace and Microsoft 365 only) in order for this rule to work. Once connected, the list will be automatically synced and kept up-to-date. For more information, see the $org_vips documentation: https://docs.sublimesecurity.com/docs/configure-org_vips-list This rule is recommended to be used on a relatively small list of VIPs, and is meant to reduce attack surface by detecting any message that matches the protected list of display names from a first-time or unsolicited sender. Additional rule logic can be added to look for suspicious subjects, suspicious links, etc.

References #

mailbox.email

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Section
Sublime-Message-mailbox

Description

Message Data Model attribute: mailbox.email

Fields #

NameDescription
domain.sldSecond-level domain, e.g. 'windows' for the domain 'windows.net'
emailFull email address
local_partLocal-part, i.e. before the @

Detection Rules #

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Sublime MQL #

Show 1 more (4 total)
  • Link: Free file hosting with undisclosed recipients source medium: Detects messages containing links to free file hosting or subdomain services that are sent to undisclosed recipients or only CC/BCC recipients. The rule identifies suspicious distribution patterns where legitimate recipients are hidden, potentially indicating mass distribution of malicious content through file sharing platforms.

References #