Executive Summary

On January 15, 2025, MediCare Plus, a fictional healthcare provider serving approximately 50,000 patients, detected unauthorized access to their network infrastructure. The incident resulted in the compromise of internal systems and potential exposure of sensitive patient data.

Initial Detection

The security team identified anomalous behavior in the network traffic patterns at 02:30 EST. Investigation revealed unauthorized access through a compromised VPN credential belonging to a third-party vendor.

Attack Timeline

• Day 1: Initial access through compromised VPN credentials
• Day 2-3: Lateral movement across the network using living-off-the-land techniques
• Day 4: Deployment of custom malware for persistence
• Day 5: Data exfiltration attempts detected
• Day 6: Security team containment and system isolation

Attribution Analysis

Through detailed analysis of the threat actor's tactics, techniques, and procedures (TTPs), we identified several key indicators linking this attack to the fictional threat group "Azure Spider":

• Custom malware signatures matching previously known Azure Spider toolsets
• Command and control infrastructure overlapping with historical Azure Spider operations
• Unique keyboard layout artifacts suggesting Eastern European origin
• Timing of operations consistent with UTC+3 timezone activity

Technical Indicators

Malware Hash: d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9
C2 Domains: evil-control.example[.]com
            backup-server.example[.]net
IP Addresses: 192.0.2.100
              198.51.100.200

Recommendations

1. Implement multi-factor authentication across all remote access points