U.S. House lawmakers want to know how hackers broke into education tech giant Instructure twice and stole reams of data from students who use the company's flagship student data software Canvas.

The cybercrime group ShinyHunters claimed to have hacked Instructure again, defacing the login pages of several Instructure customer schools with an extortion message.

The data breach at education tech giant Instructure includes students' private data, according to a sample of the allegedly stolen data seen by TechCrunch.