CEO impersonation with Microsoft Booking
Recently I observed an interesting behavior after setting up a Microsoft Booking page. After creating the booking page, I suddenly got an e-mail to an automatically created mail alias with the same name as the booking page. This made me curious and I wanted to understand the behavior behind this, and if this could be abused by attackers to impersonate users in Exchange online. In this blog post, I want to share my findings and some tips on how to detect and prevent this kind of abuse in your environment. ...