Red vs. Blue: Modern Active Directory Attacks & Defense

DEF CON 23

Presented by: Sean Metcalf
Date: Friday August 07, 2015
Time: 13:00 - 13:50
Location: Track Three

Kerberos "Golden Tickets" were unveiled by Alva "Skip" Duckwall & Benjamin Delpy in 2014 during their Black Hat USA presentation. Around this time, Active Directory (AD) admins all over the world felt a great disturbance in the Force. Golden Tickets are the ultimate method for persistent, forever AD admin rights to a network since they are valid Kerberos tickets and can't be detected, right?

This talk explores the latest Active Directory attack vectors and describes how Golden Ticket usage can be detected. When forged Kerberos tickets are used in AD, there are some interesting artifacts that can be identified. Yes, despite what you may have read on the internet, there are ways to detect Golden & Silver Ticket usage.

Skip the fluff and dive right into the technical detail describing the latest methods for gaining and maintaining administrative access in Active Directory, including some sneaky AD persistence methods. Also covered are traditional security measures that work (and ones that don't) as well as the mitigation strategies that disrupts the attacker's preferred game-plan. Prepare to go beyond "Pass-the-Hash" and down the rabbit hole.

Some of the topics covered:

Kerberos expertise is not required since the presentation covers how Active Directory leverages Kerberos for authentication identifying the areas useful for attack. Information presented is useful for both Red Team & Blue Team members.

Sean Metcalf

Sean Metcalf is the Chief Technology Officer at DAn Solutions, a company that provides Microsoft platform engineering and security expertise. Mr. Metcalf is one of about 100 people in the world who holds the elite Microsoft Certified Master Directory Services (MCM) certification. Furthermore, he assisted Microsoft in developing the Microsoft Certified Master Directory Services certification program for Windows Server 2012. Mr. Metcalf has provided Active Directory and security expertise to government, corporate, and educational entities since Active Directory was released. He currently provides security consulting services to customers with large Active Directory environments and regularly posts useful Active Directory security information on his blog, ADSecurity.org. Follow him on Twitter @PyroTek3 Twitter: @PyroTek3 Web: ADSecurity.org


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