Adversaries may log into accessible cloud services within a compromised environment using Valid Accounts that are synchronized with or federated to on-premises user identities. The adversary may then perform management actions or access cloud-hosted resources as the logged-on user.
Many enterprises federate centrally managed user identities to cloud services, allowing users to login with their domain credentials in order to access the cloud control plane. Similarly, adversaries may connect to available cloud services through the web console or through the cloud command line interface (CLI) (e.g., Cloud API), using commands such as
Connect-AZAccount for Azure PowerShell,
Connect-MgGraph for Microsoft Graph PowerShell, and
gcloud auth login for the Google Cloud CLI.
In some cases, adversaries may be able to authenticate to these services via Application Access Token instead of a username and password.
Use multi-factor authentication on cloud services whenever possible.
|M1026||Privileged Account Management||
Limit the number of high-privileged domain and cloud accounts, and ensure that these are not used for day-to-day operations. Ensure that on-premises accounts do not have privileged cloud permissions and that isolated, cloud-only accounts are used for managing cloud environments.
|ID||Data Source||Data Component||Detects|
|DS0028||Logon Session||Logon Session Creation||
Monitor for newly constructed logon behavior to cloud services. For example, in Azure AD, consider using Identity Protection to monitor for suspicious login behaviors to cloud resources.