The US Department of Health and Human Services has confirmed that a cyberattack on Change Healthcare affected 100 million people, marking the largest medical data breach in US history. The health insurance technology provider was targeted by ransomware hacking group ALPHV, or “BlackCat”. Impacted individuals were informed that their personal details, including social security and passport numbers, and health insurance plan data may have been compromised.

“PupkinStealer” A New .NET-Based Malware Steals Browser Credentials & Exfiltrate via Telegram
PupkinStealer is a C# malware that steals sensitive data, including browser credentials and desktop files, using Telegram for stealthy data exfiltration. Discovered in April 2025,