AD Enumeration & Attacks - Skills Assessment Part II 2

Please help me. Im loosing my mind. I have incredible problems with Q8. Ive been trying to solve that for 2 weeks now. How possibly could you get the flag. I really have no idea. I bet it has sth in common with CT*** user. I see that in Bloodhound. So actually I should ask: ‘how to get ct***’?