UnitedHealth Group affirmes that a ransomware attack on its subsidiary Change Healthcare resulted in the theft of vast amounts of private healthcare data of Americans. The company paid undisclosed ransom but the hacking group, RansomHub, began publishing portions of the stolen data. This cyberattack, which began in February, has cost UnitedHealth over $870 million and hugely disrupted the US healthcare system.

“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,