• Sublime Core Feed

Description

Detects messages from Zoom Docs in which the document originates from a newly observed email address or contains suspicious indicators.

References

No references.

Sublime Security
Created May 23rd, 2025 • Last updated Dec 2nd, 2025
Source
type.inbound
and sender.email.domain.root_domain == "zoom.us"
and strings.ends_with(sender.display_name, "Zoom Docs")
and (
  any(html.xpath(body.html, '//h2').nodes,
      // extract the sender email out of the message body
      any(regex.iextract(.display_text,
                         '^(?P<sender_display_name>[^\(]+)\((?P<sender_email>[^\)]+@(?P<sender_domain>[^\)]+))\)'
          ),
          .named_groups["sender_domain"] not in $org_domains
          and .named_groups["sender_email"] not in $recipient_emails
          and .named_groups["sender_email"] not in $sender_emails
          and not (
            .named_groups["sender_domain"] not in $free_email_providers
            and .named_groups["sender_domain"] in $recipient_domains
            and .named_groups["sender_domain"] in $sender_domains
          )
      )
  )
  or any(body.links,
         .href_url.domain.domain == "docs.zoom.us"
         and any(filter(ml.link_analysis(., mode="aggressive").final_dom.links,
                        .href_url.domain.root_domain != 'zoom.us'
                        and .href_url.domain.domain != 'zoom.us'
                 ),
                 (
                   // any of those links domains are new
                   network.whois(.href_url.domain).days_old < 30
                   // go to free file hosts
                   or .href_url.domain.root_domain in $free_file_hosts
                   or .href_url.domain.domain in $free_file_hosts

                   // go to free subdomains hosts
                   or (
                     .href_url.domain.root_domain in $free_subdomain_hosts
                     // where there is a subdomain
                     and .href_url.domain.subdomain is not null
                     and .href_url.domain.subdomain != "www"
                   )
                   // go to url shortners
                   or .href_url.domain.root_domain in $url_shorteners
                   or .href_url.domain.domain in $url_shorteners
                   or (
                     // find any links that mention common "action" words
                     regex.icontains(.display_text,
                                     '(?:view|click|show|access|download|goto|Validate|Va[il]idar|login|verify|account)'
                     )
                   )
                 )
         )
  )
)
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