TELEGRAM 4 Sturnus - New Android banking trojan targets WhatsApp, Telegram, and Signal Nov 20, 2025 RAVEN STEALER UNMASKED Telegram-Based Data Exfiltration Jul 26, 2025 Telegram Messenger's Ties to Russia's FSB Revealed in New Report Jun 10, 2025 Malicious Ruby Gems Exfiltrate Telegram Tokens and Messages Following Vietnam Ban Jun 2, 2025