Open redirect: Indeed

name: "Open redirect: Indeed"
description: "Detects emails containing links using Indeed '/r?target=xxxxxx' open redirect where the email has not come from indeed.com"
references:
  - "https://www.bleepingcomputer.com/news/security/evilproxy-uses-indeedcom-open-redirect-for-microsoft-365-phishing/"
type: "rule"
severity: "medium"
source: |
  type.inbound
  and (
    (
      sender.email.domain.root_domain != "indeed.com"
      and any(body.links, "indeed_open_redirect" in .href_url.rewrite.encoders)
    )
    or any(attachments,
           .file_type == "pdf"
           and any(file.explode(.),
                   any(.scan.url.urls,
                       "indeed_open_redirect" in .rewrite.encoders
                   )
           )
    )
  )
  
  // 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
  )
attack_types:
  - "Credential Phishing"
  - "Malware/Ransomware"
tactics_and_techniques:
  - "Open redirect"
detection_methods:
  - "Sender analysis"
  - "URL analysis"
id: "98ce5477-49dd-5e60-b778-f8c2fcb283c2"