Implementing Anti-Ransomware Group Policy

When to Use

• Hardening a Windows Active Directory environment against ransomware execution and propagation
• Implementing defense-in-depth by blocking ransomware execution paths via Group Policy
• Configuring AppLocker or WDAC rules to prevent unauthorized executables from running in user-writable directories
• Enabling Controlled Folder Access to protect critical directories from unauthorized file modifications
• Restricting lateral movement vectors (RDP, SMB, WMI) that ransomware uses to spread across the domain

Do not use as a standalone ransomware defense. GPO settings complement but do not replace endpoint detection, backups, network segmentation, and user awareness training.

Prerequisites