sublimemediumRule

Open redirect: Dell

Message contains use of the Dell open redirect, but the sender is not Dell.

MITRE ATT&CK

T1566 T1566.001 T1566.002 T1598 T1204.002 T1486

Detection Query

type.inbound
and any(body.links,
        .href_url.domain.domain == 't.em.home.dell.com'
        and .href_url.path =~ '/r/'
)
and sender.email.domain.root_domain not in ('dell.com', 'dell.ca')

// negate highly trusted sender domains unless they fail DMARC authentication
and (
  (
    sender.email.domain.root_domain in $high_trust_sender_root_domains
    and not headers.auth_summary.dmarc.pass
  )
  or sender.email.domain.root_domain not in $high_trust_sender_root_domains
)

Data Sources

Email MessagesEmail HeadersEmail Attachments

Platforms

Tags

Attack surface reduction

Raw Content

name: "Open redirect: Dell"
description: |
  Message contains use of the Dell open redirect, but the sender is not Dell.
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(body.links,
          .href_url.domain.domain == 't.em.home.dell.com'
          and .href_url.path =~ '/r/'
  )
  and sender.email.domain.root_domain not in ('dell.com', 'dell.ca')
  
  // negate highly trusted sender domains unless they fail DMARC authentication
  and (
    (
      sender.email.domain.root_domain in $high_trust_sender_root_domains
      and not headers.auth_summary.dmarc.pass
    )
    or sender.email.domain.root_domain not in $high_trust_sender_root_domains
  )
tags:
  - "Attack surface reduction"
attack_types:
  - "Credential Phishing"
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Open redirect"
detection_methods:
  - "Sender analysis"
  - "URL analysis"
id: "718c2b0f-7ac3-5473-bb7c-12900b3da54a"