Pro-Ukrainian hacking group Blackjack has claimed to have breached a Moscow internet service provider in revenge for a Russian attack last month on Kyivstar, Ukraine’s largest telecom provider. The cyberattack targeted Moscow-based M9 Telecom and is reported to have destroyed the provider’s servers, deleting about 20 terabytes of data, including the company’s official website, branch websites, mail server and cyber protection services.

Source: SiliconANGLE