Called to land line here today. Last week it was "Windows Technical Support" claiming their servers were showing infection by Trojans on my PC. Sounded like a boiler room in the Phillipines. Answered yes when I asked if he works for MS, US when I asked his location. Hung up when I asked for his number.
Today it sounded similar but this time creepily addressing me by my first name, heavy accent, introducing himself as Mark Williams, manager from the Windows Refunds department. Said he saw that I had recently bought a new PC (true) and had overpaid for Windows. Again would not give me his phone number. My CID captured it as ACS V EXPANS which I could redial at 1 347 753 9068 answering "If you'd like more information about Asterisk Dial 2 now... If you'd like to test out the voiceover IP capabilities of Asterisk, dial 500..."
My guess is they are raking in credit card numbers of unwitting victims. I wonder if banks like mine which protect against fraudulent charges, or like my Dad's who wouldn't let him send money to an account they' flagged, are getting any traction on this.
I wonder if being able to capture their CID info might help. It could be a phone laundering site for overseas scam operations.