Forest Hackthebox Walkthrough Best [patched]

Forest HackTheBox Walkthrough: Mastering Active Directory Exploitation

Forest is an "Easy" difficulty Windows machine on HackTheBox (HTB) that serves as a fundamental introduction to Active Directory (AD) exploitation. The attack path focuses on reconnaissance, abusing Kerberos pre-authentication, and leveraging nested group permissions for domain-level privilege escalation. 1. Enumeration and Information Gathering

The objective is to map the attack surface and identify the target as a Domain Controller.

Network Scanning: Use nmap to identify open ports. Typical results for Forest include: Port 88 (Kerberos): Confirms AD environment. Port 135/445 (RPC/SMB): Crucial for user enumeration. Port 389 (LDAP): Used for querying domain objects.

User Enumeration: Use tools like rpcclient or enum4linux to identify valid domain users. A notable account found during this phase is svc-alfresco. 2. Initial Access: AS-REP Roasting

Once users are identified, the next step is to look for accounts with Kerberos Pre-Authentication disabled.

4) Local enumeration & escalation

With valid user credentials (e.g., svc_backup):
- Use smbclient to access shares, winrm or RDP if allowed.
- Use impacket's wmiexec.py, smbexec.py, or psexec.py to run commands remotely:
  - wmiexec.py forest\svc_backup:Pass@
- Dump processes and check for sensitive service credentials or LSASS memory access.
If you have local admin on a host, dump LSA secrets / cached creds:
- Use mimikatz (privilege escalation -> SeDebugPrivilege) or built-in tools to extract credentials from memory.
- Example commands (on a Windows host with appropriate privileges):
  - mimikatz # privilege::debug
  - mimikatz # sekurlsa::logonpasswords

Conclusion

The Forest HackTheBox machine is a masterpiece of realistic AD misconfiguration. The "best" walkthrough isn't about the shortest path; it's about the reproducible, methodological process.

You learned to:

Enumerate AD via LDAP anonymously.
Exploit AS-REP Roasting.
Abuse SeBackupPrivilege to dump NTDS.dit.
Pass-the-Hash to total compromise.

Final Note for HTB players: Forest is retired, but the techniques are eternal. Practice this walkthrough until you can do it without looking at the commands. Then, tackle Sauna (AS-REP Roasting again) and Active (SMB enumeration).

Happy Hacking, and remember: Enumeration is the only privilege you need.

Did this walkthrough help you? Share it with your study group. For more, check our guides on Active Directory, Kerberos attacks, and HTB "Easy" machines.

Forest HackTheBox Walkthrough: Mastering Active Directory Exploitation

Hack The Box's Forest machine is a classic Windows "Easy" box that serves as a cornerstone for learning Active Directory (AD) exploitation. Despite its "Easy" rating, many users find it challenging because it requires a deep understanding of AD misconfigurations, particularly AS-REP Roasting and DACL abuse. forest hackthebox walkthrough best

This walkthrough provides a comprehensive guide to gaining a foothold and escalating to Domain Admin. Phase 1: Reconnaissance and Enumeration

The first step is identifying the attack surface. Since Forest is a Windows machine, we expect to see standard AD services.

Nmap Scan: Start with a full port scan to identify open services.

Port 88 (Kerberos): Confirms the machine is a Domain Controller.

Port 389 (LDAP): Reveals the domain name htb.local and hostname forest.htb.local.

Port 445 (SMB) and 5985 (WinRM): Potential entry points for lateral movement and remote management.

User Enumeration: Use rpcclient with a null session to enumerate domain users. Command: rpcclient -U '' -N 10.10.10.161

Use enumdomusers to generate a list of valid usernames, such as svc-alfresco, andy, and mark. Phase 2: Initial Access via AS-REP Roasting

With a list of valid users, the next objective is finding an account vulnerable to AS-REP Roasting—a technique targeting accounts that do not require Kerberos pre-authentication.

The Forest machine on Hack The Box is a classic "Easy" Windows box that focuses heavily on Active Directory (AD) enumeration and exploitation. Its most interesting feature is the complete lack of a web application. Instead of searching for a website vulnerability, you must attack the core Windows services directly. Best Walkthrough Steps

According to top-rated guides like those from 0xdf and IppSec, the optimal path follows these stages:

Reconnaissance: Use nmap to find open ports like 88 (Kerberos), 135 (RPC), and 389 (LDAP). 4) Local enumeration & escalation

User Enumeration: Exploit an RPC Null Session using rpcclient to list valid domain users without a password.

Initial Access: Perform an AS-REP Roasting attack against the identified users to grab a password hash and crack it offline.

Internal Access: Use the cracked credentials to log in via Evil-WinRM.

Privilege Escalation: Run BloodHound to visualize the AD environment and find a path from your current user to Domain Admin.

Root Execution: Abuse ACL permissions (specifically for the "Exchange Windows Permissions" or "Exchange Trusted Subsystem" groups) to grant yourself DCSync rights.

Final Step: Use the secretsdump tool from the Impacket suite to dump the Administrator's hash and gain full control. 🌟 Interesting Feature: No Web Surface

Most CTF machines begin with a web server, but Forest forces you to engage with Active Directory misconfigurations immediately. This makes it a premier training ground for the OSCP exam and real-world enterprise pentesting. 🛠️ Key Tools Used BloodHound: Essential for mapping complex AD attack paths.

Impacket: Used for AS-REP Roasting and dumping domain secrets.

Evil-WinRM: The primary method for gaining a shell once you have credentials.

For a visual guide on the methodology used to tackle Windows Active Directory machines like Forest, watch this walkthrough: Getting Started with HackTheBox in 2025 | Cheatsheet Inside The Cyber Mentor YouTube• Jun 7, 2025 AI responses may include mistakes. Learn more

Cracking the Hash

Save the hash in hash.txt and use hashcat (mode 18200):

hashcat -m 18200 -a 0 hash.txt /usr/share/wordlists/rockyou.txt

Result (after 30 seconds):

$krb5asrep$... : s3rvice

Credentials: svc-alfresco : s3rvice

Summary

Forest is a beginner-to-intermediate Windows box focused on Active Directory enumeration, credential theft (LSASS), Kerberos/AS-REP/Pass-the-Hash style abuse, and lateral movement to a domain controller. This walkthrough shows a structured, high-level progression from initial foothold to domain compromise with commands and key findings. Do not run any of these steps against systems you do not own or have explicit permission to test.

Step 1: Enumerate Users

Use enum4linux or impacket-GetADUsers to list domain users.

impacket-GetADUsers -dc-ip 10.10.10.161 htb.local/

Alternatively, use kerbrute to brute usernames from a wordlist:

kerbrute userenum --dc 10.10.10.161 -d htb.local /usr/share/seclists/Usernames/xato-net-10-million-usernames.txt

But for efficiency, we can also use ldapsearch:

ldapsearch -x -H ldap://10.10.10.161 -b "CN=Users,DC=htb,DC=local" | grep sAMAccountName

Users found: svc-alfresco, sebastien, lucinda, andy, mark, santi.

Critical Reception

While universally praised, the box is not without critics. Some users find the enumeration phase tedious, particularly if they are unfamiliar with Linux-based Windows enumeration tools. Additionally, because the box relies on a misconfiguration that is easy to spot with automated tools like enum4linux, it is possible to "script-kiddie" your way through the first step without understanding the underlying RPC protocols.

However, these are minor gripes. For a student willing to read the "How" and "Why," Forest is flawless.

Final Tips for HackTheBox Beginners

Enumerate thoroughly – Port 5985 (WinRM) is your friend.
Always run BloodHound – It cuts through the complexity of AD.
Learn to love Impacket – It’s the Swiss Army knife for AD attacks.
Don't ignore low-privilege users – Even svc-alfresco can own the domain.

Now go pwn Forest like a pro. Happy hacking!

Gaining Access (Foothold)

We have valid credentials. Let's check if we can access the machine. Since WinRM is open, we check if svc-alfresco has remote access permissions.

We can use evil-winrm to attempt a login.

evil-winrm -u svc-alfresco -p s3rvice -i 10.10.10.161

Result: Access granted!

We now have a PowerShell shell on the Domain Controller. We can grab the user.txt flag from the Desktop of svc-alfresco.