Archives: Microsoft Azure

Impersonating Office 365 Users With Mimikatz

January 15, 2017 | Michael Grafnetter | No Comments

Introduction Last month, Microsoft has introduced a new feature of Azure AD Connect called Single Sign On. It allows companies to configure SSO between AD and AAD without the need to deploy ADFS, which makes it an ideal solution for SMEs. Here is a high-level diagram of this functionality: As we can see from the diagram above, Azure AD exposes a publicly available endpoint that accepts Kerberos tickets and translates them • Read More »

Tags: Active Directory, Microsoft Azure, Mimikatz, Office 365, Security

How Azure Active Directory Connect Syncs Passwords

October 18, 2015 | Michael Grafnetter | 7 Comments

Many people have asked me about the security implications of synchronizing passwords from Active Directory to Azure Active Directory using the Azure AD Connect tool. Although there is an article on Technet that claims that the passwords are synced in a very secure hashed form that cannot be misused for authentication against the on-premise Active Directory, it lacks any detail about the exact information being sent to Microsoft’s servers. A post at • Read More »

Tags: Active Directory, Microsoft Azure, Office 365, PowerShell, Security

List of Cmdlets in the DSInternals Module

September 29, 2015 | Michael Grafnetter | 6 Comments

Here is the list of cmdlets currently contained in the DSInternals PowerShell module: Online operations with the Active Directory database Get-ADReplAccount – Reads one or more accounts through the DRSR protocol, including secret attributes. Set-SamAccountPasswordHash – Sets NT and LM hashes of an account through the SAMR protocol. Get-ADReplBackupKey – Reads the DPAPI backup keys through the DRSR protocol. Offline operations with the Active Directory database Get-ADDBAccount – • Read More »

Tags: Active Directory, DPAPI, Microsoft Azure, Office 365, PowerShell, Security

New version of the DSInternals module released

September 5, 2015 | Michael Grafnetter | No Comments

I have released a new version of the DSInternals PowerShell module. This is mainly a bugfix release. You can grab it from the Downloads section. Or, if you have PowerShell 5, you can install the module from the PowerShell Gallery by running this command:

1	Install-Module -Name DSInternals

Tags: Active Directory, Microsoft Azure, PowerShell, Security

The DSInternals PowerShell Module has been released

February 28, 2015 | Michael Grafnetter | 2 Comments

I have decided to publish the DSInternals PowerShell Module, which contains a few cmdlets I use during my lectures about Active Directory security. You can find it in the Downloads section. It currently lacks any documentation, so Get-Help won’t give you nice results, but I am working on that. Examples

Import-Module DSInternals

$pwd = ConvertTo-SecureString 'Pa$$W0rd' -AsPlainText -Force

# Calculate the NT and LM hashes

ConvertTo-NTHash $pwd

# Output: 92937945b518814341de3f726500d4ff

ConvertTo-LMHash $pwd

# Output: 727e3576618fa1754a3b108f3fa6cb6d

# Set AD account password hash using the SAMR protocol

Set-SamAccountPasswordHash -SamAccountName john -Domain ADATUM -NTHash '92937945b518814341de3f726500d4ff' -Server dc1.adatum.com

# Calculate the OrgId hash, that is sent to Azure Active Directory by DirSync

ConvertTo-OrgIdHash -NTHash '92937945b518814341de3f726500d4ff'

# Output: v1;PPH1_MD4,f76bc776428002f87f4b,100,0ab46c4a6351db87cc13323bb01eea073c90a52e376fffca559e57fbb19a441a;

# Decrypt a password from Group Policy Preferences

ConvertFrom-GPPrefPassword 'v9NWtCCOKEUHkZBxakMd6HLzo4+DzuizXP83EaImqF8'

# Output: Pa$$w0rd

# Decrypt a password from an unattend.xml file

ConvertFrom-UnattendXmlPassword 'UABhACQAJAB3ADAAcgBkAEEAZABtAGkAbgBpAHMAdAByAGEAdABvAHIAUABhAHMAcwB3AG8AcgBkAA=='

# Output: Pa$$w0rd

Error reporting If you find an error in the DSInternals Powershell Module, I would be glad if you sent me an e-mail. Planned • Read More »

Tags: Active Directory, Microsoft Azure, PowerShell