In December 2018, Palo Alto Networks Unit 42 researchers identified an ongoing campaign with a strong focus on the hospitality sector, specifically on hotel reservations. Although our initial analysis didn’t show any novel or advanced techniques, we did observe strong persistence during the campaign that triggered our curiosity.

https://unit42.paloaltonetworks.com/operation-comando-or-how-to-run-a-cheap-and-effective-credit-card-business/