Open redirect: phoenixartstudio.net

name: "Open redirect: phoenixartstudio.net"
description: |
  Message contains use of the Phoenix Art Studio redirect. This has been exploited in the wild.
type: "rule"
severity: "medium"
source: |
  type.inbound
  and any(body.links,
          .href_url.domain.root_domain == "phoenixartstudio.net"
          // the redirect field
          and regex.icontains(.href_url.query_params, 'keyvalue=\d+(?:&|$)')
          and strings.icontains(.href_url.query_params, '&page=')
          and not regex.icontains(.href_url.query_params,
                                  '&page=[^\&]*phoenixartstudio\.net(?:\&|\/|$)'
          )
  )
  and not sender.email.domain.root_domain in ("phoenixartstudio.net")
  
  // 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: "7b83c3ab-a09a-5667-ae23-fba5b19c9f2f"