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vial12 - LO1️2️

Learning Object 12

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Tasks

1 - Check if student867 has Replication (DCSync) rights

  • If yes, execute the DCSync attack to pull hashes of the krbtgt user.

  • If no, add the replication rights for student867 and execute the DCSync attack to pull hashes of the krbtgt user.

Flag 21 [dcorp-dc] - Attack that can be executed with Replication rights (no DA privileges required) 🚩

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Solutions

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1 - Check if student867 has Replication (DCSync) rights

We can check if student687 has replication rights using the following commands:

C:\AD\Tools\InviShell\RunWithRegistryNonAdmin.bat
. C:\AD\Tools\Powerview.ps1
Get-DomainObjectAcl -SearchBase "DC=dollarcorp,DC=moneycorp,DC=local" -SearchScope Base -ResolveGUIDs | ?{($_.ObjectAceType -match 'replication-get') -or ($_.ActiveDirectoryRights -match 'GenericAll')} | ForEach-Object {$_ | Add-Member NoteProperty 'IdentityName' $(Convert-SidToName $_.SecurityIdentifier);$_} | ?{$_.IdentityName -match "student867"}

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If no, add the replication rights for student867 and execute the DCSync attack to pull hashes of the krbtgt user.

The student867 doesn't have replication rights, let's add it starting a process as Domain Administrator by running the below command from an elevated command prompt:

Run the following command in the new process:

Go back into the student867 shell to check if all go right:

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Flag 21 [dcorp-dc] - Attack that can be executed with Replication rights (no DA privileges required) 🚩

The DCSync attack can be executed with Replication rights (no DA privileges required).

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