Microsoft Hack Hits Hundreds of Firms, Agencies as Damage Spreads

Microsoft Corp. said a Chinese hacking group is exploiting security vulnerabilities in the company’s SharePoint servers to deploy ransomware, following a cyberattack discovered last week that has affected hundreds of entities around the world.

The group, which Microsoft has named Storm-2603, has a history of waging ransomware attacks, which use malicious software to lock down computers and render them inoperable. Ransomware groups usually then demand payment from their victims to unlock the computers.