HackTheBox - Dancing

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Description

Hello l33ts, I hope you are doing well. Today we are going to look at Dancing from HackTheBox. It’s a windows machine running smb with a misconfigured share that permits to log in to it without valid credentials.

Enumeration

nmap

We start a nmap scan using the following command: sudo nmap -sC -sV -T4 -Pn {target_IP}.

• -sC: run all the default scripts.

• -sV: Find the version of services running on the target.

• -T4: Aggressive scan to provide faster results.

Nmap scan report for 10.129.196.235 (10.129.196.235)
Host is up (0.20s latency).
Not shown: 997 closed tcp ports (reset)
PORT    STATE SERVICE       VERSION
135/tcp open  msrpc         Microsoft Windows RPC
139/tcp open  netbios-ssn   Microsoft Windows netbios-ssn
445/tcp open  microsoft-ds?
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
| smb2-time: 
|   date: 2022-07-21T14:31:05
|_  start_date: N/A
| smb2-security-mode: 
|   3.1.1: 
|_    Message signing enabled but not required
|_clock-skew: 3h59m59s

We see that the target is a windows machine running SMB - Server Message Block Protocol - and it is a client-server communication protocol used for sharing access to files, printers, serial ports and other resources on a network.

SMB share drives on a server that can be connected to and used to view or transfer files. SMB can often be a great starting point for an attacker looking to discover sensitive information.

In order to enumerate SMB, we can use a tool called enum4linux or smbclient.

First, we need to list available share in the server, we do that with the following command : sudo smbclient -L 10.192.196.235. We will be prompt to submit a password, we just press enter without giving one.

• ADMIN$ - Administrative shares are hidden network shares created by the Windows NT family of operating systems that allow system administrators to have remote access to every disk volume on a network-connected system. These shares may not be permanently deleted but may be disabled.
• C$ - Administrative share for the C:\ disk volume. This is where the operating system is hosted.
• IPC$ - The inter-process communication share. Used for inter-process communication via named pipes and is not part of the file system.
• WorkShares - Custom share.

Foothold

Let’s connect to the custom share ‘WorkShares’. sudo smbclient \\\\10.129.196.235\\WorkShares.

Great! The WorkShares share was misconfigured and allowed to log in without a password. Most of the commands of SMB are the same as the ones in linux, so we can list the content of the directory with ls.

We found two directories, one for Amy.J and one for James.P.

Let’s go into Amy’s directory and list it’s content.

Found file named worknotes.txt. To View the file’s content, we first need to download it to our machine. To do that, we can use get worknotes.txt.

We downloaded the file successfully, now let’s go to james directory and do the same steps as before.

Found flag.txt file and downloaded it to our machine.

To exit smb, enter quit, after that we can see the file we downloaded in our current directory.

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Thank you for taking the time to read my write-up, I hope you have learned something from this. If you have any questions or comments, please feel free to reach out to me. See you in the next hack :).