Ransomware Data Breach Ransom Ransom Demand Data Theft Software Outage Norway Government Israeli Monitoring System Ziv Hospital Communication Disruption Network security Hospital Cyberattack Protocols Network Interruption Network interruption IT provider Change Healthcare Healthcare Industry UnitedHealth AT&T Nation-state cyberattack Nation-State Cyberattack Nation-State Actor Nation-state cyber threat actor Coding Error Network Security Russian Hackers Hackers System Disruptions Denial of Service Attack Healthcare Cybersecurity Healthcare Data Breach Hacking Group Cargo Ship Cyberattack UnitedHealth Group Critical Infrastructure State Office State Legislature's Bill Drafting Office Backup System Hacking Cyber Incident Response Healthcare disruptions Improving Cybersecurity Healthcare Systems CDK Global