Architecture

What is password hash synchronization with Microsoft Entra ID? - Microsoft Entra IDMicrosoftLearn

Password Hash Syncronization:

• All password hashes between on-prem AD and Entra ID are sync'd via DCSync.

• All on-prem users can access Entra ID resources (Teams, M365, Sharepoint, etc).

  • Easy to pivot from on-prem because all user are available. MSOL account is a juicy target because it's used to sync passwords.

Pass Through Authentication:

• PTA agent is used to authenticate against an on-prem server. Password hashes are not sync'd.

• Agents can be modified or new ones can be installed from attacker perspective.

ADFS:

• On-prem AD is in charge of authentication to the cloud.

  • CAPs do not apply to ADFS logins.

Azure Lighthouse:

• Used by MS(S)Ps to manage multiple environments at once.

  • IR wants to understand how the client was onboarded (subscription or resource group level).

    • Where are password hashes stored?