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LianYu

Box Description

A Beginner level Security Challenge.

NMAP​

  • [FTP: 21] [SSH: 22] [HTTP: 80] [RPC: 111] 
Nmap scan report for 10.10.231.6
Host is up (0.083s latency).

PORT    STATE SERVICE VERSION
21/tcp  open  ftp     vsftpd 3.0.2
22/tcp  open  ssh     OpenSSH 6.7p1 Debian 5+deb8u8 (protocol 2.0)
| ssh-hostkey: 
|   1024 56:50:bd:11:ef:d4:ac:56:32:c3:ee:73:3e:de:87:f4 (DSA)
|   2048 39:6f:3a:9c:b6:2d:ad:0c:d8:6d:be:77:13:07:25:d6 (RSA)
|   256 a6:69:96:d7:6d:61:27:96:7e:bb:9f:83:60:1b:52:12 (ECDSA)
|_  256 3f:43:76:75:a8:5a:a6:cd:33:b0:66:42:04:91:fe:a0 (ED25519)
80/tcp  open  http    Apache httpd
|_http-title: Purgatory
|_http-server-header: Apache
111/tcp open  rpcbind 2-4 (RPC #100000)
| rpcinfo: 
|   program version    port/proto  service
|   100000  2,3,4        111/tcp   rpcbind
|   100000  2,3,4        111/udp   rpcbind
|   100000  3,4          111/tcp6  rpcbind
|   100000  3,4          111/udp6  rpcbind
|   100024  1          33203/udp   status
|   100024  1          47739/tcp   status
|   100024  1          60464/udp6  status
|_  100024  1          60894/tcp6  status
Service Info: OSs: Unix, Linux; CPE: cpe:/o:linux:linux_kernel

FFUF​

  • Found Username: [IP:80/island]
        /'___\  /'___\           /'___\       
       /\ \__/ /\ \__/  __  __  /\ \__/       
       \ \ ,__\\ \ ,__\/\ \/\ \ \ \ ,__\      
        \ \ \_/ \ \ \_/\ \ \_\ \ \ \ \_/      
         \ \_\   \ \_\  \ \____/  \ \_\       
          \/_/    \/_/   \/___/    \/_/       

________________________________________________

 :: Method           : GET
 :: URL              : http://10.10.231.6/FUZZ
 :: Wordlist         : FUZZ: Dirbuster/directory-list-2.3-medium.txt
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200,204,301,302,307,401,403,405,500
________________________________________________

island                  [Status: 301, Size: 234, Words: 14, Lines: 8, Duration: 137ms]

  • Hidden Comment: [IP:80/island/2100]
________________________________________________

 :: Method           : GET
 :: URL              : http://10.10.231.6/island/FUZZ
 :: Wordlist         : FUZZ: Dirbuster/directory-list-2.3-medium.txt
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200,204,301,302,307,401,403,405,500
________________________________________________

2100                    [Status: 301, Size: 239, Words: 14, Lines: 8, Duration: 114ms]


Content Discovery​

  • Found the Username vigilante : [IP:80/island]
Ohhh Noo, Don't Talk...............

I wasn't Expecting You at this Moment. I will meet you there
You should find a way to Lian_Yu as we are planed. The Code Word is:

vigilante

  • Hidden Comment: [IP:80/island/2100]
How Oliver Queen finds his way to Lian_Yu?
<!-- you can avail your .ticket here but how?   -->
  • Fuzzing by Extension [.ticket].
  • Found an Encoded Text: [IP:80/island/2100/green_arrow.ticket] 
________________________________________________

 :: Method           : GET
 :: URL              : http://10.10.231.6/island/2100/FUZZ
 :: Wordlist         : FUZZ: Dirbuster/directory-list-2.3-medium.txt
 :: Extensions       : .ticket 
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200,204,301,302,307,401,403,405,500
________________________________________________

green_arrow.ticket      [Status: 200, Size: 71, Words: 10, Lines: 7, Duration: 123ms]

  • BASE58 Encoded Text: [IP:80/island/2100/green_arrow.ticket]
This is just a token to get into Queen's Gambit(Ship)

'RTy8yhBQdscX'

  • Decoding the Text
  • FTP Password: vigilante:!#th3h00d
┌──────────────┐    ┌───────────┐
| RTy8yhBQdscX | -► | !#th3h00d |
└──────────────┘    └───────────┘

FTP​

  • We can Login as: vigilante:!#th3h00d
  • The File [aa.jpg] has a ZIP File Hidden Inside.
  • The File [.other_user] contains an SSH Username Slade
ftp> ls -al
drwxr-xr-x    2 1001     1001         4096 May 05  2020 .
drwxr-xr-x    4 0        0            4096 May 01  2020 ..
-rw-------    1 1001     1001           44 May 01  2020 .bash_history
-rw-r--r--    1 1001     1001          220 May 01  2020 .bash_logout
-rw-r--r--    1 1001     1001         3515 May 01  2020 .bashrc
-rw-r--r--    1 0        0            2483 May 01  2020 .other_user
-rw-r--r--    1 1001     1001          675 May 01  2020 .profile
-rw-r--r--    1 0        0          511720 May 01  2020 Leave_me_alone.png
-rw-r--r--    1 0        0          549924 May 05  2020 Queen's_Gambit.png
-rw-r--r--    1 0        0          191026 May 01  2020 aa.jpg
ftp> mget .other_user Leave_me_alone.png Queen's_Gambit.png aa.jpg

  • File: .other_user
  • Found Possible Username: Slade
'Slade' Wilson was 16 years old when he enlisted in the United States Army, having lied about his age. 

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