Walkthrough Best - Forest Hackthebox

Anonymous enumeration ↓ LDAP / RPC user list ↓ AS-REP Roasting → svc-alfresco creds ↓ WinRM access → User flag ↓ SeMachineAccountPrivilege + GenericWrite ↓ Add machine account → Set SPN on Admin → Kerberoast ↓ Crack Admin hash → WinRM as Administrator → Root flag

: Log in as the Administrator using psexec.py or evil-winrm with the NTLM hash to claim the root flag. Expert Tips HackTheBox: Forest Walkthrough - Sanaullah Aman Korai

In this walkthrough, we will cover the enumeration of a Domain Controller, exploiting a misconfiguration to gain an initial foothold, performing privilege escalation via ACLs, and finally dumping the domain hashes to capture the root flag.

Set-DomainObjectOwner -Identity "Exchange Windows Permissions" -OwnerIdentity "svc-alfresco" forest hackthebox walkthrough best

| Vulnerability | Fix | |---------------|-----| | AS-REP Roasting | Disable "Do not require Kerberos pre-authentication" for all users unless absolutely necessary. | | Weak password | Enforce strong password policy (svc-alfresco's password was weak). | | SeMachineAccountPrivilege for service accounts | Restrict this privilege to only highly trusted accounts. | | GenericWrite over domain | Review ACLs and remove unnecessary write permissions. | | No SPN protection | Monitor for unauthorized SPN modifications. |

With DCSync rights, you can impersonate a Domain Controller to request password hashes for any user.

We are now in a limited shell. Navigate to the desktop: Anonymous enumeration ↓ LDAP / RPC user list

nmap -sV -sC -oA forest 10.10.10.74

The user is member of Service Accounts group, which has – allows adding a machine account to the domain.

Now that we know we have the power to modify domain permissions (via the nested groups), we must act. We have two paths: the "Exploit" path using PowerShell, or the "Manual" path using impacket . | | Weak password | Enforce strong password

The script queries the Domain Controller for each user. If pre-auth is disabled, it returns an encrypted blob (the AS-REP).

GetNPUsers.py htb.local/ -userfile users.txt -format john -outputfile hashes.txt -dc-ip 10.10.10.161 Use code with caution. Cracking the Hash

Now that we own the group, we can add ourselves to it. Then, we abuse DCSync to dump domain hashes.