LONDON — Magecart, the digital card-skimming collective, is now so ubiquitous that its infrastructure is flooding the internet. In a paper presented at Virus Bulletin 2019 this week in London, Jordan Herman and Yonathan Klijnsma of RiskIQ said that there are now 573 known C2 domains for the group, with close to 10,000 hosts actively loading those domains.

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