Microsoft says cyberattacks using new malware hit Ukraine hours before Russia’s invasion began; the company added new signatures to Defender within three hours (Jordan Novet/CNBC)

Jordan Novet / CNBC:
Microsoft says cyberattacks using new malware hit Ukraine hours before Russia’s invasion began; the company added new signatures to Defender within three hours  —  – Brad Smith, Microsoft’s president, wrote in a blog post on Monday about the company’s efforts to keep Ukraine informed of cyberattacks.