sublimelowRule

Disposable sender email (unsolicited)

Sender is using a disposable email service and no one in our organization has ever sent them an email.

Detection Query

type.inbound
and sender.email.domain.root_domain in $disposable_email_providers
and sender.email.email not in $recipient_emails

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Tags

Attack surface reduction

Raw Content

name: "Disposable sender email (unsolicited)"
description: |
  Sender is using a disposable email service and no one in our organization
  has ever sent them an email.
type: "rule"
severity: "low"
source: |-
  type.inbound
  and sender.email.domain.root_domain in $disposable_email_providers
  and sender.email.email not in $recipient_emails
tags:
  - "Attack surface reduction"
detection_methods:
  - "Sender analysis"
id: "5436b3db-3f17-5100-8136-1d03fc221fca"