It can be anything! An apex, subdomain, or even a URL.
Results for*.slack-files.com.slack.slacktest.proxyautomation.myshn.eu
www.*.slack-files.com.slack.slacktest.proxyautomation.myshn.euslack-files.com.slack.slacktest.proxyautomation.myshn.eucom.slack.slacktest.proxyautomation.myshn.euslack.slacktest.proxyautomation.myshn.euslacktest.proxyautomation.myshn.euproxyautomation.myshn.eumyshn.eueu