Magento 2 Skimmer Exfiltrates to Telegram Bot

A JavaScript skimmer that exfiltrates stolen payment data to a Telegram bot that is under the attacker’s control.
Magento PHP Skimmer - validateData

A PHP skimmer stealing payment data and user login data is injected into Magento core files OnepageController.php and User.php.
BREAKDOWN: Magento 2 PHP Skimmer - $dataoo

A breakdown of a PHP skimmer found across multiple websites and injected into the Magento core file app/bootstrap.php.
printcss.host Loads JavaScript Skimmer 0x2031

A JavaScript skimmer loading from a fake CSS request to URL printcss[.]host/styles.css which was injected into the Magento 2 database table cms_block.content.
Skimmer Loaded Via Image On MemberPress Checkout Form & Magento

A payment card skimmer hidden within an existing PNG image on an infected WordPress website that uses MemberPress and collects payment data for private membership. A variant was also found stealing payment card information on an infected Magento website.