Active from HackTheBox is an easy Windows box, in which we first find AD credentials in Group Policy Preferences and subsequently do a kerberoasting attack to get domain administrator. Port Scanning The open TCP ports indicate that we’re dealing with an AD domain controller running Windows Server 2008 R2: PORT STATE SERVICE VERSION 53/tcp open domain Microsoft DNS 6.1.7601 (1DB15D39) (Windows Server 2008 R2 SP1) | dns-nsid: |_ bind.version: Microsoft DNS 6. Read more

This lab starts by exploiting a stored XSS vulnerability and a vulnerable Java browser plugin to get a (unprivileged) remote shell on one of the company’s internal network machines. In a next step, using the socalled Group Policy Preferences (GPP) vulnerability, it’s possible to get local administrator credentials. Bypassing UAC allows to further escalate the privileges to SYSTEM and force a domain administrator to login to the machine, by preventing an importing application to work,so that the user will contact IT support. Read more