The Sansec early breach detection system, which monitors the global ecommerce space for security threats, detected 1904 distinct Magento stores with a unique keylogger (skimmer) on the checkout page. On Friday, 10 stores got infected, then 1058 on Saturday, 603 on Sunday and 233 today.
Please read the complete article here https://sansec.io/research/largest-magento-hack-to-date
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