2 :80 bucket.htb

http://bucket.htb/
Bucket Advertising Platform
| [e-mail]

# view source shows
<img src="http://s3.bucket.htb/adserver/images/bug.jpg" alt="Bug" height="160" width="160">

$ gobuster dir -u http://bucket.htb -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -x php,html,txt -t 80
===============================================================
/index.html           (Status: 200) [Size: 5344]

$ wfuzz -c -w /usr/share/seclists/Discovery/DNS/subdomains-top1million-110000.txt -u bucket.htb -H "HOST: FUZZ.bucket.htb" --hw 26
Target: http://bucket.htb/
Total requests: 114441

=====================================================================
ID           Response   Lines    Word       Chars       Payload
=====================================================================
000000247:   404        0 L      2 W        21 Ch       "s3 - s3"

# adding s3.bucket.htb to /etc/hosts