Synopsis
Activation Period |
14 Days |
Training Period |
30 Days |
Test Period |
N/A (single event) |
Deduplication Period |
1 Day |
Required Data |
|
Detection Modules |
Identity Threat Module |
Detector Tags |
|
ATT&CK Tactic |
|
ATT&CK Technique |
|
Severity |
Informational |
Description
First-time synchronization of an on-premises domain user with an existing cloud account.
Attacker's Goals
- Attackers may leverage DirectorySync to move laterally from a compromised on-premise environment into the cloud tenant, allowing them to bypass the cloud's security boundaries and take over high-value cloud identities.
Investigative actions
- Check if the cloud account was an administrator (Global Admin, etc.) before this sync.
- Determine if the on-premise user was recently created or if its 'proxyAddress' attribute was recently modified.
- Confirm if the organization intended to transition this account from Cloud-Only to Hybrid.
- Verify the consistency between the on-premises 'ObjectGUID' and the newly assigned 'ImmutableID' in Azure AD.