A crook has been using three open source AI harnesses to target hundreds of online retailers and other companies, swiping more than 600,000 credit card records and installing card-stealing skimmers - and all at trivial cost. AI security company Gambit recovered the human operator’s staging server, and used that access to reconstruct the data-theft campaign, whose victims include a Fortune 500 hospitality company, a major US airline, a large private US industrial supplies distributor, and a US online fashion retailer. Between September 10 and September 15, the crook launched at least 105 attacks, and compromised, “to varying degrees,” at least 27 companies, Gambit director of threat intelligence Eyal Sela wrote in a Tuesday alert. The Chinese-speaking operator used three different open…