AAD | Abuse Service Principals

Hi!

Attackers want to target service principals because:

  • Service accounts and service principals do not have MFA
  • Attackers can log into Azure using a service principal account
  • These accounts exist with all applications in Azure (most companies have several) 
  • These accounts could be controlled through conditional access only with an Azure Active Directory P2.

Sign-in with the service principal using Azure CLI:

az login –service-principal -u YourServicePrincipald -p YourServicePrincipalPassword -tenant YourTenantId –allow-no-subscriptions

To prevent this attack, you can define a Conditional Access policies for your service principals. You need to have an Azure Active Directory Premium P2 to enable this feature.

Maxime.

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