Lateral SMB/RPC Movement From Workstation Subnet to Domain Controller
Detects network connections from workstation subnets to domain controllers using administrative protocols such as SMB (445), RPC (135), RDP (3389), or WinRM (5985/5986). This activity is indicative of lateral movement attempts by an adversary attempting to reach critical infrastructure from a compromised workstation in a flat or poorly segmented environment.
Sigma
