In November of 2018, we published the cornerstone report  “Inside Magecart,” in which we disclosed the existence of seven distinct Magecart groups and described in detail their operations and the different ways they skim payment information. Since then, we’ve detailed even more groups, such as Group 11 and Group 12.

https://www.riskiq.com/blog/labs/magecart-group-4-always-advancing/