ATLSECCON 2025

Organizations use network file shares to store and manage various types of data. While securing file access on the cloud presents its own set of challenges, traditional Server Message Block (SMB) network shares are still widely used and won't disappear anytime soon.

Aware of it or not, organizations typically have lots of open shares - just as often containing sensitive data. Built in Windows tools makes identifying these shares difficult and fixing them even harder. Once remediated, ensuring shares stay locked down and new, insecure folders aren’t created is paramount to prevent a never-ending game of wack a mole.

This presentation will discuss low pain and structured approaches to identifying, remediating and preventing open shares in networks of all sizes to drastically reduce your organization's attack surface.