New RDP Connection Initiated From Domain Controller
Detects an RDP connection originating from a domain controller. This activity is highly suspicious as domain controllers should not typically initiate RDP connections to other machines. Such an event could indicate lateral movement by an attacker who has compromised the domain controller. The rule specifically filters out connections made by "Microsoft.Tri.Sensor.exe", which is associated with Microsoft Defender for Identity, to avoid false positives from legitimate security operations.
Sigma
