MonitorsFour is a Windows-based HackTheBox machine that demonstrates a multi-stage attack chain combining web application vulnerabilities, authentication bypass through PHP type juggling, CVE exploitation, and Docker API abuse for privilege escalation. This writeup details the complete exploitation process from initial reconnaissance to root access.

Environment Configuration

Configure DNS resolution for the target domain:

echo "10.10.11.98 monitorsfour.htb cacti.monitorsfour.htb" | sudo tee -a /etc/hosts

Target: 10.10.11.98
Attacker: 10.10.14.143

Reconnaissance & Information Gathering

Network Enumeration

Initial port scanning reveals the attack surface:

nmap -A -O 10.10.11.98

Open Ports:

  • 80/tcp: nginx HTTP service redirecting to monitorsfour.htb

  • 5985/tcp: WinRM (Microsoft HTTPAPI httpd 2.0)

Operating System: Windows Server (2022/2012/2016)

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