CDK Global calls cyberattack that crippled its software platform a “ransom event” CBS NewsDFW car dealerships improvise after cyberattacks The Dallas Morning NewsAfter cyber attack, CDK says restoration underway for auto dealers USA TODAYRipple effect from CDK hack widens as more U.S. auto dealers flag hit CNBCSoftware company plans to pay tens of millions in ransom to hackers who crippled car dealerships across North America Fortune