TechCrunch has summarized major data breaches from 2021. Key examples include: genetic testing giant 23andMe losing data for close to 7 million customers and blaming user negligence; Change Healthcare, processing between a third and a half of all US healthcare transactions, taking seven months to admit that a cyberattack had stolen over 100 million users’ data; and London-based pathology provider Synnovis being hit by a ransomware attack causing service disruption for months. The breaches involved company giants like AT&T, Ticketmaster, and Santander Bank, with several organizations, including retailer Hot Topic, not publicly disclosing data breach occurrences.

Warning issued over ‘fast flux’ techniques used to obscure malicious signals on compromised networks
Law enforcement agencies have warned that organizations face a common network vulnerability that allows hackers to dodge detection and distribute malicious software indiscriminately. Referred to