Attack Groups CryptoCore: North Korean Hacking Group July 30, 2026 ♡Follow0 CryptoCore is a North Korean threat actor focused on cryptocurrency theft, also known as BlueNoroff and Sapphire Sleet. Discovered from: Amazon Links Debug and Chalk npm Hijack to North Korea’s Sapphire Sleet CryptoCorecryptocurrencyNorth Koreatheft