Microsoft and JumpCloud both disclosed breaches of their cloud services last week. It's nice they each disclosed these incidents, but it shouldn't be up to them. We need a mandate that will force cloud service companies to publish detailed postmortems when these things happen.
In the first announcement on 11 July, Microsoft revealed details of a likely China-based actor it calls 'Storm-0558' that had successfully accessed the cloud-based Outlook email of 25 organisations. The actor had targeted government agencies and individual consumer accounts likely associated with these organisations. Microsoft did not specify the affected organisations, but The Washington Post reported that the US Commerce and State departments were affected.
In a more detailed analysis of Storm-0558’s techniques, Microsoft says the group has "primarily targeted US and European diplomatic, economic, and legislative governing bodies, and individuals connected to Taiwan and Uyghur geopolitical interests". According to the vendor, the group’s objective in most campaigns is to access the email accounts of its targets. Microsoft says it has "moderate confidence" that the group is a China-based espionage actor, although from our standpoint, it walks like a duck and quacks like a duck, so it's probably a duck.