Cyber attacks 2024: The biggest attacks of the first half of 2024

**Executive summary:** This brief recap highlights major 2024 cyber incidents — the MOAB data leak (billions of records exposed via a firewall failure), ransomware-driven disruptions at London Drugs and healthcare providers, a cross-border operational outage at CDK Global, and a CrowdStrike service outage that spawned phishing campaigns — and draws practical lessons for security managers on firewall hygiene, incident response planning, employee training, and vigilance during outages.