Windows

Overview Fusion corp is a hard rated box on tryhackme. After some basic enumeration fails, we find a backup file on the web server that contains a list of usernames. One of these users, lparker, is vulnerable to AS-REP Roasting because they have Kerberos pre-authentication disabled. We get their hash, crack it, and get a shell on the box. From there, post-exploitation enumeration reveals another user, jmurphy, with their password stored in the user account’s comment field. This user is a member of the Backup Operators group. We abuse this privilege to create a shadow copy of the C: drive and exfiltrate the ntds.dit and SYSTEM hives. Finally, we use secretsdump.py to dump all the domain hashes, get the administrator’s hash, and use it to get the final flag. ...

Overview Crocc Crew is an insane machine on TryHackMe, but it’s kinda like a easy box. The path starts with some clever RDP reconnaissance to find initial credentials. From there, it involves kerberoasting a service account, diving into BloodHound to find a constrained delegation path, and wrestling with a very frustrating secretsdump error that I almost rage quit and touched grass. Let’s walk through it. Target IP 10.10.208.147 + − ⌂ [https://i.ibb.co/JjzkJ3NR/user-removebg-preview.png]Nmap Scan [https://i.ibb.co/LzdxQFPv/computer-removebg-preview.png]Bypass RDP NLA → Spot Sticky Note → Visitor:GuestLogin! [https://i.ibb.co/Kckn13Nh/database-removebg-preview.png]Enumerate SMB → Home Share → Get User Flag [https://i.ibb.co/Gwv4v4g/shell-exploit-removebg-preview.png]Kerberoast password-reset → Crack with Hashcat [https://i.ibb.co/JR4shsmH/login-removebg-preview.png]Login as password-reset → Run BloodHound [https://i.ibb.co/Gwv4v4g/shell-exploit-removebg-preview.png]Find Constrained Delegation to oakley/DC [https://i.ibb.co/0ybfPw9J/password-removebg-preview.png]Use getST.py to impersonate Administrator [https://i.ibb.co/LzdxQFPv/computer-removebg-preview.png]Fix /etc/hosts → Run secretsdump [https://i.ibb.co/JR4shsmH/login-removebg-preview.png]Evil-WinRM as Administrator [https://i.ibb.co/679DN5x7/rooted-removebg-preview.png]LDAPSearch → Identify Planted 1. Initial Access (TA0001) As always, the first step is a thorough nmap scan to see what we’re working with. ...

Overview Ra is a Hard machine on TryHackme it started with exploiting a weak password reset mechanism on a web application. After finding employee names and guessing a security question based on a pet’s name found in an image file, we get our initial credentials. This leads us to an SMB share with an installer for a vulnerable Spark XMPP client. The real challenge begins here: we have to set up a sandboxed environment to run the client, debug Java and audio errors within Docker, and finally exploit a Cross-Site Scripting (XSS) vulnerability (CVE-2020-12772) to capture another user’s NTLM hash. ...