Return - Hack The Box
Enumeración
Aplicamos una enumeración con nmap.
# Nmap 7.92 scan initiated Mon Sep 19 04:59:08 2022 as: nmap -sCV -p53,80,88,135,139,389,445,464,593,636,3268,3269,5985,9389,47001,49664,49665,49666,49667,49671,49674,49675,49679,49682,49694 -oN targeted 10.10.11.108
Nmap scan report for 10.10.11.108
Host is up (0.24s latency).
PORT STATE SERVICE VERSION
53/tcp open domain Simple DNS Plus
80/tcp open http Microsoft IIS httpd 10.0
|_http-title: HTB Printer Admin Panel
|_http-server-header: Microsoft-IIS/10.0
| http-methods:
|_ Potentially risky methods: TRACE
88/tcp open kerberos-sec Microsoft Windows Kerberos (server time: 2022-09-19 13:18:02Z)
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: return.local0., 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: return.local0., Site: Default-First-Site-Name)
3269/tcp open tcpwrapped
5985/tcp open http Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)
|_http-server-header: Microsoft-HTTPAPI/2.0
|_http-title: Not Found
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
49664/tcp open msrpc Microsoft Windows RPC
49665/tcp open msrpc Microsoft Windows RPC
49666/tcp open msrpc Microsoft Windows RPC
49667/tcp open msrpc Microsoft Windows RPC
49671/tcp open msrpc Microsoft Windows RPC
49674/tcp open ncacn_http Microsoft Windows RPC over HTTP 1.0
49675/tcp open msrpc Microsoft Windows RPC
49679/tcp open msrpc Microsoft Windows RPC
49682/tcp open msrpc Microsoft Windows RPC
49694/tcp open msrpc Microsoft Windows RPC
Service Info: Host: PRINTER; OS: Windows; CPE: cpe:/o:microsoft:windows
Host script results:
|_clock-skew: 5h18m44s
| smb2-time:
| date: 2022-09-19T13:19:01
|_ start_date: N/A
| smb2-security-mode:
| 3.1.1:
|_ Message signing enabled and required
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
# Nmap done at Mon Sep 19 05:00:31 2022 -- 1 IP address (1 host up) scanned in 83.16 seconds
Cuando termina el escaneo de nmap, vemos que el servicio 80 http está abierto. Una vez que entramos a la web nos dirigimos a settings, y vemos 4 entradas de input, cambiamos el Server Address por nuestra ip, y nos ponemos en escucha en el puertop 389.
Elevación de privilegios
Una vez dentro como el usuario svc-printer, aplicamos un comando para ver en que grupos forma parte. Y vemos que forma parte del grupo server operators, lo que este grupo nos permite es configurar un servicio. Configuramos un servicio que tenga una reverse shell, y lo paramos e iniciamos devuelta para que los cambios sean aplicados.
