KrebsOnSecurity recently heard from a reader whose boss’s email account got phished and was used to trick one of the company’s customers into sending a large payment to scammers. An investigation into the attacker’s infrastructure points to a long-running Nigerian cybercrime ring that is actively targeting established companies in the transportation and aviation industries. Image: Shutterstock, Mr. Teerapon Tiuekhom. A reader who works in the transportation industry sent a tip about a recent successful phishing campaign that tricked an executive at the company into entering their credentials at a fake Microsoft 365 login page. From there, the attackers quickly mined the executive’s inbox for past communications about invoices, copying and modifying some of those messages with new invoice demands that were sent to some of the company’s customers and partners.…