Open redirect: convertcart.com

type.inbound
// convertcart is used in benign messages, however, they commonly have many links
// ensure messages contain less than 10 links convertcart.com to ensure higher fidelity matching of malicious messages
and length(filter(body.links, .href_url.domain.root_domain == "convertcart.com")
) < 10
and any(body.links,
        .href_url.domain.root_domain == "convertcart.com"
        and strings.iends_with(.href_url.path, '/click')
        and strings.icontains(.href_url.query_params, 'url=')
        and not regex.icontains(.href_url.query_params,
                                'url=(?:https?(?:%3a|:))?(?:%2f|\/){2}[^&]*convertcart\.com(?:\&|\/|$|%2f)'
        )
        and not strings.icontains(.href_url.query_params,
                                  sender.email.domain.root_domain
        )
)
// remove uses that originate from convertcart.com
and not any(headers.domains,
            .root_domain in ("convertcart.com", "convertc.com")
)
// 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
)