Detection and Response

Early Warning Systems

Security Information and Event Management (SIEM)

• Real-time log collection and analysis
• Correlation rules for ransomware indicators
• Automated alerting and notification systems
• Integration with threat intelligence feeds
• Custom detection rules for organizational context

User and Entity Behavior Analytics (UEBA)

• Baseline normal user and system behavior
• Detect anomalous activities and access patterns
• Risk scoring and prioritization
• Machine learning-enhanced detection
• Integration with identity and access management

Ransomware-Specific Indicators

File System Monitoring

• Rapid file modification patterns
• Suspicious file extension changes
• Creation of ransom notes and payment instructions
• Deletion of system restore points and backups
• Unusual file access patterns and volumes

Network Traffic Analysis

• Communication with known ransomware C2 servers
• Unusual outbound data transfers
• Tor network usage and anonymization tools
• Cryptocurrency payment activities
• DNS queries to suspicious domains

Process and Registry Monitoring

• Execution of encryption utilities
• Registry modifications for persistence
• Service manipulation and deletion
• Shadow copy deletion activities
• Privilege escalation attempts

Incident Response Procedures

Immediate Response Actions

1. Isolation - Disconnect affected systems from the network
2. Assessment - Determine the scope and impact of the attack
3. Containment - Prevent further spread of the ransomware
4. Investigation - Identify the attack vector and timeline
5. Recovery - Restore systems and data from clean backups

Communication and Coordination

• Establish incident command structure
• Notify relevant stakeholders and authorities
• Coordinate with law enforcement if required
• Manage public relations and customer communications
• Document all response activities for post-incident analysis