Access from Proving Grounds Practice is an intermediate rated Windows Active Directory (AD) machine, in which we first get a shell through a file upload vulnerability in a web application running in the context of a low privileged domain user svc_apache. Within that shell we perform a kerberoasting attack using Rubeus and obtain the credentials of the user svc_mssql. In order to get a shell as svc_mssql, we make use of a tool called RunasCs. Read more

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 6.1.7601 (1DB15D39) 88/tcp open kerberos-sec Microsoft Windows Kerberos (server time: 2024-05-02 11:16:18Z) 135/tcp open msrpc Microsoft Windows RPC 139/tcp open netbios-ssn Microsoft Windows netbios-ssn 389/tcp open ldap Microsoft Windows Active Directory LDAP (Domain: active.htb, Site: Default-First-Site-Name) 445/tcp open microsoft-ds? 464/tcp open kpasswd5? 593/tcp open ncacn_http Microsoft Windows RPC over HTTP 1.0 636/tcp open tcpwrapped 3268/tcp open ldap Microsoft Windows Active Directory LDAP (Domain: active.htb, Site: Default-First-Site-Name) 3269/tcp open tcpwrapped 5722/tcp open msrpc Microsoft Windows RPC 9389/tcp open mc-nmf .NET Message Framing 47001/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP) |_http-title: Not Found |_http-server-header: Microsoft-HTTPAPI/2.0 Service Info: Host: DC; OS: Windows; CPE: cpe:/o:microsoft:windows_server_2008:r2:sp1, cpe:/o:microsoft:windows Port 47001 reveals the hostname dc.active.htb, which we can verify using nslookup: Read more