What defensive strategies can organizations implement to prevent DCOM lateral movement attacks?

Defenders should block DCOM communications by restricting inbound RPC ports and disabling unnecessary DCOM objects, especially `MMC20.Application` and the listed CLSIDs. Use Group Policy to disable DCOM or enable firewall rules that block dynamic RPC ports. Monitor for suspicious PowerShell commands invoking DCOM and for attempts to modify firewall settings via `netsh`. Regular auditing of administrative credentials and implementing least privilege can reduce the attack surface. These defenses complement those outlined in Domain Penetration - Executing Programs on Remote Systems Using DCOM.