Popular sportswear brand Umbro Brasil website hacked and injected with two web skimmers part of the Magecart group. One of the two skimming scripts checks for the presence of other skimming code and if present will slightly alter the credit card number that was entered by the victim. The first skimmer is loaded via a fake BootStrap library domain bootstrap-js[.]com, recently discussed by Brian Krebs. The second skimmer uses a special function to encode the data it exfiltrates in a standard output.”]
Source: https://blog.malwarebytes.com/threat-analysis/2018/11/web-skimmers-compete-umbro-brasil-hack/