Brand impersonation: Sharepoint

type.inbound
and length(body.links) > 0
and (
  any(attachments,
      (.file_type in $file_types_images or .file_type == "pdf")
      and any(ml.logo_detect(.).brands, .name == "Microsoft SharePoint")
  )
  or any(ml.logo_detect(file.message_screenshot()).brands,
         .name == "Microsoft SharePoint"
  )
  or strings.istarts_with(strings.replace_confusables(body.current_thread.text),
                          "Sharepoint"
  )
  or regex.icontains(body.html.raw,
                     '<img.*(title=|alt=).share.*src=""'
  ) // broken Sharepoint logo
)
and (
  (
    any(ml.nlu_classifier(body.current_thread.text).intents,
        .name == "cred_theft" and .confidence == "high"
    )
    //
    // This rule makes use of a beta feature and is subject to change without notice
    // using the beta feature in custom rules is not suggested until it has been formally released
    //
    or any(ml.nlu_classifier(beta.ocr(file.message_screenshot()).text).intents,
           .name == "cred_theft" and .confidence == "high"
    )
  )
  or any(ml.nlu_classifier(body.current_thread.text).entities,
         .name == "urgency" and strings.ilike(.text, "*encrypted*")
  )
  or any(body.links,
         regex.imatch(.display_text,
                      '(?:re)?view (?:(?:&|and) (?:e([[:punct:]]|\s)?)?sign )?(?:complete )?(?:document|file)'
         )
  )
)
and not (
  (
    (
      strings.istarts_with(subject.subject, "RE:")
      or strings.istarts_with(subject.subject, "R:")
      or strings.istarts_with(subject.subject, "ODG:")
      or strings.istarts_with(subject.subject, "答复:")
      or strings.istarts_with(subject.subject, "AW:")
      or strings.istarts_with(subject.subject, "TR:")
      or strings.istarts_with(subject.subject, "FWD:")
      or regex.imatch(subject.subject, '(\[[^\]]+\]\s?){0,3}(re|fwd?)\s?:')
      or regex.imatch(subject.subject,
                      '^\[?(EXT|EXTERNAL)\]?[: ]\s*(RE|FWD?|FW|AW|TR|ODG|答复):.*'
      )
    )
    and (
      (length(headers.references) > 0 or headers.in_reply_to is not null)
      // ensure that there are actual threads
      and (
        length(body.previous_threads) > 0
        or (length(body.html.display_text) - length(body.current_thread.text)) > 200
      )
    )
  )
)
and (
  profile.by_sender_email().prevalence != 'common'
  or not profile.by_sender_email().solicited
  or profile.by_sender().any_messages_malicious_or_spam
)
and not profile.by_sender().any_messages_benign

// 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
)

// negate sharepoint file share
and not (
  // based on the message id format
  (
    (
      strings.starts_with(headers.message_id, '<Share-')
      and strings.ends_with(headers.message_id, '@odspnotify>')
    )
    or // negate legitimate access request to file
 (
      strings.starts_with(headers.message_id, '<Sharing')
      and strings.ends_with(headers.message_id, '@odspnotify>')
    )
    // deal with Google thinking the message ID is "broke"
    or (
      strings.icontains(headers.message_id, 'SMTPIN_ADDED_BROKEN')
      and any(headers.hops,
              any(.fields,
                  .name == "X-Google-Original-Message-ID"
                  and strings.starts_with(.value, '<Share-')
                  and strings.ends_with(.value, '@odspnotify>')
              )
      )
    )
  )
  // all of the "action" links are sharepoint/ms
  and all(filter(body.links,
                 strings.icontains(subject.subject, .display_text)
                 or .display_text == "Open"
          ),
          .href_url.domain.root_domain in ("sharepoint.com")
          or (
            .href_url.domain.tld == "ms"
            // Microsoft does not own the .ms TLD, this checks to ensure it is one of their domains
            and (
              network.whois(.href_url.domain).registrant_company == "Microsoft Corporation"
              or strings.ilike(network.whois(.href_url.domain).registrar_name,
                               "*MarkMonitor*",
                               "*CSC Corporate*",
                               "*com laude*"
              )
            )
          )
  )
)