security-program.md

Algorithm: Ransomware Defense Against LockBit 3.0

1. Initialize Security Parameters

   • Define protected_folders = [list of critical folders].
   • Set backup_schedule = Daily/Weekly.
   • Enable real_time_monitoring.
   • Define alert_recipients = [Admin email/phone].

2. Set Up Preventive Measures
   2.1 System Hardening

   • Enable and configure firewall rules.
   • Disable unnecessary services (e.g., SMBv1, Telnet, etc.).
   • Regularly update the OS, antivirus software, and applications.

   2.2 Restrict Privileges

   • Assign least_privilege_access to users and applications.
   • Enforce MFA (Multi-Factor Authentication) for all critical accounts.

   2.3 File Protection

   • Enable Controlled Folder Access for protected_folders.
   • Use read-only or immutable backups for sensitive data.

   2.4 Application Security

   • Enable application whitelisting (allowed_apps).
   • Block execution from risky directories (e.g., %Temp%, %Downloads%).

3. Deploy Monitoring and Detection Systems

   • Enable logging for system activities:
     • File access and modification events.
     • Registry changes.
     • Process execution.
   • Deploy behavior-based detection tools to identify unusual activities:
     • Mass file renaming.
     • High disk I/O.
     • Connections to known malicious IPs/domains.

4. Real-Time Monitoring Algorithm

   while system_running:
       monitor(file_operations)
       if mass_file_rename_detected or high_disk_IO_detected:
           alert_admin("Potential ransomware activity detected.")
           isolate_system()
           halt_suspicious_processes()
   

5. Backup Management

   • Schedule automated, offline backups for critical data:
     • Use encrypted backups.
   • Verify backups regularly for integrity.

6. Restrict Network Activity
   6.1 Network Segmentation

   • Divide the network into isolated zones (e.g., user, production, backup).
   • Limit lateral movement with strict access controls.

   6.2 Outbound Connection Control

   • Block outgoing traffic to unknown IPs/domains.
   • Use DNS filtering to prevent connections to malicious servers.

7. Respond to Ransomware Activity
   7.1 Isolation

   • Disconnect affected devices from the network.
   • Stop suspicious processes immediately.

   7.2 Recovery

   • Restore data from clean backups.
   • Rebuild affected systems to ensure no ransomware.

   7.3 Communication

   • Inform stakeholders and report incidents to cybersecurity authorities.

8. Post-Incident Measures

   • Analyze attack logs to identify vulnerabilities.
   • Patch security weaknesses.
   • Update security policies.
   • Train users to recognize phishing and other attack vectors.