Answers

What is a group that targets your sector who has been in operation since at least 2013? APT33

Does this group use Stuxnet? (Yay/Nay) Nay

As your organization is migrating to the cloud, is there anything attributed to this APT group that you should focus on? If so, what is it? Cloud Accounts

What tool is associated with this technique? Ruler

Per the detection tip, what should you be detecting? abnormal or malicious behavior

What platforms does this affect? AWS, Azure, Azure AD, GCP, Office 365, SaaS