The Webhook payload that's being sent arrives at Slack with "WP Umbrella" and the logo icon. It would be nice to choose what's included in these payloads or at least remove the branding and URL links so we can set up alerts to client Slack instances. This includes the sales link to upgrade to Site Protect. Since the payload includes these things, we can't change or remove them via Slack Dev App so the client sees the WP branding.