Attacking Kerberos by Nairuz Abulhul

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Trust this user/computer for delegation to any service. Delegation is the act of giving someone authority or responsibility to do something on behalf of someone else. A similar concept is applied in the Active Directory environment; delegation allows an account with the delegate property to impersonate another account to access resources within the network. There are three (3) known types of delegations allowed with Kerberos: Unconstrained, Constrained, and Resource-based constrained delegations. For this post, we will focus on abusing the first type — Unconstrained delegation. We will learn to abuse it during a pentest engagement to perform a privilege escalation to a higher level user, such as the domain admin????. The attack demonstration steps will be on the Pentester Academy Active Directory Lab by Nikhil Mittal associated with the CRTP course. ????KEY CONCEPTS Unconstrained Delegation Overview Analysis Flow Attack Requirements Escalation Vectors Used Tools Demonstration Steps Mitigation References $_Unconstrained_Delegation_Overview Unconstrained delegation....

March 12, 2022
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20 days ago

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6 months ago

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Phillip Trimble
Phillip Trimble
2 years ago

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