JavaScript on payment pages
Sansec describes how JavaScript code added to payment pages in Magecart attacks copies card details and sends them to the attacker. Sansec
Malicious code written in JavaScript that steals data by running in the browser, in Node.js or inside an Electron application.
JavaScript appears in two forms: scripts added to payment pages that copy forms, and infostealers packaged with Node.js and Electron and distributed like desktop applications. MITRE ATT&CK
Electron applications contain large, legitimate files, which makes them suitable for hiding malicious code; file scanners can easily miss a small script inside a package of hundreds of megabytes.
The code is embedded in a desktop application that looks like a game or tool. MITRE ATT&CK
The Node.js runtime accesses browser files and the system directly. MITRE ATT&CK
Data is usually sent via a webhook or a Telegram bot. MITRE ATT&CK
Sansec describes how JavaScript code added to payment pages in Magecart attacks copies card details and sends them to the attacker. Sansec
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