Slides - https://www.slideshare.net/slideshow/finding-holes-in-conditional-access-policies/274723226
Abstract:
Microsoft Entra Conditional Access sits at the forefront of organization's security boundaries. The ever-changing climate of conditional access continues to give administrators more and more security controls. The tradeoff of which is increased complexity when attempting to balance security and productivity. The more policies deployed in a tenant, the greater the chance for misconfigurations that create opportunities for exploitation. Whether you're a cloud administrator, security consultant, or adversary, the goal remains the same: to find the holes in conditional access.
This talk discusses lessons learned from real-life engagements and identifies multiple strategies for evaluating conditional access. Topics and tooling are explored that view conditional access from several different angles. First, understanding PowerShell and Graph API is vital when combing through policies, finding gaps in user, group, role, location, application, or device configuration. Second, simulation of logon criteria and reporting on authentication events helps to understand where policies fall short. Finally, creating a visual representation of each policy is helpful to better see policy details or build executive reports. Each of these provides an important piece of the puzzle when attempting to identify methods to bypass security controls. Audience members should expect to leave with an arsenal of new tools and techniques to continuously monitor conditional access for risk.
Bio:
Brandon Colley has over fifteen years of experience administering and securing Active Directory (AD) and Windows environments. Brandon is a Senior Security Consultant for Trimarc specializing in providing reality-based AD and Entra ID security assessments. He served as a systems administrator for multiple organizations before shifting career focus to information security. He has published multiple articles through Quest, Practical 365 and Trimarc Hub. Brandon enjoys speaking engagements and has previously presented at BsidesKC, Hackers Teaching Hackers, and PancakesCon. He co-hosts a weekly podcast, interviewing infosec professionals and has appeared on multiple broadcasts, including the Phillip Wylie Show. Brandon delivers material in a humorous, yet effective manner with a focus on content built for a Blue Team through a Red lens.