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Update Hackathon-OS.md
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meh
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# Hackathon-OS
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## NMAP
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```bash
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PORT STATE SERVICE REASON VERSION
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22/tcp open ssh syn-ack ttl 64 OpenSSH 8.4p1 Ubuntu 5ubuntu1.1 (Ubuntu Linux; protocol 2.0)
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80/tcp open http syn-ack ttl 64 Apache httpd 2.4.46 ((Ubuntu))
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| http-methods:
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|_ Supported Methods: GET POST OPTIONS HEA
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| http-robots.txt: 6 disallowed entries
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|_/test/ /t3$t@123/ /includes/ /external/ /api/ /hashes/
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|_http-server-header: Apache/2.4.46 (Ubuntu)
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|_http-title: Apache2 Ubuntu Default Page: It works
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139/tcp open netbios-ssn syn-ack ttl 64 Samba smbd 4.6.2
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445/tcp open netbios-ssn syn-ack ttl 64 Samba smbd 4.6.2
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MAC Address: 80:00:0B:3C:4A:7E (Intel Corporate)
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Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
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Host script results:
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|_clock-skew: 1s
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| nbstat: NetBIOS name: FILESERVER, NetBIOS user: <unknown>, NetBIOS MAC: <unknown> (unknown)
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| Names:
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| FILESERVER<00> Flags: <unique><active>
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| FILESERVER<03> Flags: <unique><active>
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| FILESERVER<20> Flags: <unique><active>
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| \x01\x02__MSBROWSE__\x02<01> Flags: <group><active>
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```
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NMAP scan shows us 4 ports out which http and smb service looks interesting to us
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## PORT 135/445 (SMB)
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We have three shares here out of which `shares` looks interesting
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<img src="https://i.imgur.com/1S1TMhd.png"/>
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<img src="https://i.imgur.com/Nqp2Fvc.png"/>
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But we can see that we don't have read access to any of them so let's move on !
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## PORT 80 (HTTP)
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On the web server we can see a default apache page
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<img src="https://i.imgur.com/NFPbOTM.png"/>
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Since we already know about `robots.txt` from the nmap scan we can just visit that file and see what entries we may find
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<img src="https://i.imgur.com/dETv98r.png"/>
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None of these directories lead us to anywhere so let's fuzz for files and directories using `gobuster`
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<img src="https://i.imgur.com/pgKKfqU.png"/>
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This is only returned us robots.txt so no files are on the server , let's go a step back and run `enum4linux-ng` to enumerate users through smb
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<img src="https://i.imgur.com/LLCDl3F.png"/>
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<img src="https://i.imgur.com/yIdxuP2.png"/>
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This gave us the username `test` , if we remember from robots.txt file there was entry named `test` and `t3$t@123` so this maybe test user's password
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<img src="https://i.imgur.com/noRwaxf.png"/>
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## Foothold
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With this we logged into `shares` directory on smb and we see few files there
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<img src="https://i.imgur.com/m6yObjf.png"/>
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`HINT` file contains a username and a hash
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```
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clark:46a8047d5f9178c75aa6bf1090592427
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```
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While `pass.txt` contains list of potential passwords so we need to crack the `clark`'s hash using the provided worlist , we can either use `hashcat` or `john` but I'll be using hashcat for cracking this md5 hash
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<img src="https://i.imgur.com/LICCHT6.png"/>
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So we got clark's password , now we need to ssh into the machine
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<img src="https://i.imgur.com/RfEPsxl.png"/>
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<img src="https://i.imgur.com/v7Pwq2o.png"/>
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This user isn't in sudoers group also isn't allowed to run any commands as other user so let's enumerate the machine to find other user folders
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<img src="https://i.imgur.com/DuXm07L.png"/>
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## Privilege Escalation (maker)
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Here we see `Deep.zip` which was not related to rooting for this box as it only contains a flag and we can get flag by just cracking this archive's password by using the previous password list , so moving on we see `.bash_history` that's important to look at what commands the user ran
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<img src="https://i.imgur.com/0wu5sNW.png"/>
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## Rooting the box
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<img src="https://i.imgur.com/hUTKa1r.png"/>
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After switching to `maker` we realize that this user is in `villan` group so let's see what files are owned by villan group
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<img src="https://i.imgur.com/Upexet8.png"/>
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`/etc/passwd` file is owned by this group so this means that we can read/write to this file , let's verify this
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<img src="https://i.imgur.com/uzl0SUK.png"/>
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All that is left to do is to add a hash in root's entry, you can do this by generating a password hash using `openssl` but I just copied my hash from `/etc/shadow` and just pasted there
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<img src="https://i.imgur.com/9OskQtj.png"/>
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<img src="https://i.imgur.com/iyv0IA8.png"/>
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And with this we rooted this fun, amazing , challenging , hard ,OP,hackathon,not a vulnhub copied box.
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