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IT Security and Insecurity Portal |
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Need help decoding |
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 Posted: Sun Apr 25, 2010 8:41 pm |
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| fux0r360 |
| Active user |
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| Joined: Apr 25, 2010 |
| Posts: 25 |
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I dont know what happened with the last one I did but thanks for the help.
Can someone explain the process AFTER the first Base64 encoding?
Here is the original footer.php:
| Code: | <?php /* WARNING: This file is protected by copyright law. To reverse engineer or decode this file is strictly prohibited. */
$o="QAAADjsmKionYWhoc2J1J1RzZgAgdXN0JyoqOQoNJwAQO2NucScAA2RrZnR0OiVhbn8lOTsoASAB0EwSDgGibmMBcAOiKmhycyUBj3UlA+VwEAB1ZncCEg4KDQ4ODjt3OSFkaAAAd348Jzs4d293J2Jkb2gnYwAIZnNiLyBeIC48Jzg5AZRla2gCoGBuaWFoLwFSKQFkWAKARmtrJ1UQAG5gbwsAVWJ0YnVxYmMpJ0NiAAR0bmBpYmMnZX4gKyBwCcBvYhAAamJ0BTM7ZidvdWJhOiVvc3MAAHc9KChwcHApamZgYmlzaHOBAgJyfSlkaGooATQqc2Jqd2sJMHRAACgCMGJ1Zmsqd3J1d2h0YiglASI5RWJ0cydKA8MnUwKVOyhmEiB3+PEQgA5QErcTRhaoQmljFoQREAK1EMNwd1gY84AQD0MKDQoNOyhlaGN+BYA7KG9zAABqazk=";eval(base64_decode("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"));return;?> |
Using a 64 encoder I get the following:
| Code: | @��;&**'ahhsbu'Tsf� ust'**9
'�;cnq'�dkftt:%an%9;( �L�ncp�*hrs%�u%�p�ufw
;w9!dh��w~<';8wow'bdoh'c�fsb/ ^ .<'89�ekh�`niah/R)dX�Fkk'U�n`o �Ubtbuqbc)'Cb�tn`ibc'e~ + p �ob�jbt3;f'ouba:%oss��w=((ppp)jf`bishs�r})dhj(4*sbjwk 0t@�(0bufk*wruwhtb(%"9Ebts'J�'S�;(f w���P�F�Bic���pwX�C
;(ehc~�;(os��jk9 |
and
| Code: | | $lll=0;eval(base64_decode("JGxsbGxsbGxsbGxsPSdiYXNlNjRfZGVjb2RlJzs="));$ll=0;eval($lllllllllll("JGxsbGxsbGxsbGw9J29yZCc7"));$llll=0;$lllll=3;eval($lllllllllll("JGw9JGxsbGxsbGxsbGxsKCRvKTs="));$lllllll=0;$llllll=($llllllllll($l[1])<<8)+$llllllllll($l[2]);eval($lllllllllll("JGxsbGxsbGxsbGxsbGw9J3N0cmxlbic7"));$lllllllll=16;$llllllll="";for(;$lllll<$lllllllllllll($l);){if($lllllllll==0){$llllll=($llllllllll($l[$lllll++])<<8);$llllll+=$llllllllll($l[$lllll++]);$lllllllll=16;}if($llllll&0x8000){$lll=($llllllllll($l[$lllll++])<<4);$lll+=($llllllllll($l[$lllll])>>4);if($lll){$ll=($llllllllll($l[$lllll++])&0x0f)+3;for($llll=0;$llll<$ll;$llll++)$llllllll[$lllllll+$llll]=$llllllll[$lllllll-$lll+$llll];$lllllll+=$ll;}else{$ll=($llllllllll($l[$lllll++])<<8);$ll+=$llllllllll($l[$lllll++])+16;for($llll=0;$llll<$ll;$llllllll[$lllllll+$llll++]=$llllllllll($l[$lllll]));$lllll++;$lllllll+=$ll;}}else$llllllll[$lllllll++]=$llllllllll($l[$lllll++]);$llllll<<=1;$lllllllll--;}eval($lllllllllll("JGxsbGxsbGxsbGxsbD0nY2hyJzs="));$lllll=0;eval($lllllllllll("JGxsbGxsbGxsbD0iPyIuJGxsbGxsbGxsbGxsbCg2Mik7"));$llllllllll="";for(;$lllll<$lllllll;){$llllllllll.=$llllllllllll($llllllll[$lllll++]^0x07);}eval($lllllllllll("JGxsbGxsbGxsbC49JGxsbGxsbGxsbGwuJGxsbGxsbGxsbGxsbCg2MCkuIj8iOw=="));eval($lllllllll); |
It is from here, that I am stuck
If its too much of a hassle to explain I understand and thanks for the help.
Have a great day |
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| Posted: Sun Apr 25, 2010 8:55 pm |
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| vince213333 |
| Advanced user |
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| Joined: Aug 03, 2009 |
| Posts: 737 |
| Location: Belgium |
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Code:
| Code: | <!-- footer Starts -->
<div class="fix"></div>
<div id="footer-out">
<div id="footer" class="wrap">
<p>© <?php echo date('Y'); ?> <?php bloginfo(); ?>. <?php _e('All Rights Reserved. Designed by','woothemes'); ?><a href="http://www.magentothemesz.com/magento-templates/general-purpose/">Best Magento Templates</a></p>
</div>
</div>
<!-- footer Ends -->
</div>
<?php wp_footer(); ?>
</body>
</html> |
You were almost there  You shouldn't decode the $o string though. Just gotta follow the PHP code you get by decoding the second string. The easiest way is to simply change the last eval() into highlight_string(). If you'd decode the file manually you'd see the variables change until you get to that last eval(), which actually displays the page. So a simple highlight_string() would reveal the PHP code  |
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| Posted: Sun Apr 25, 2010 9:24 pm |
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| fux0r360 |
| Active user |
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| Joined: Apr 25, 2010 |
| Posts: 25 |
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Thanks for the explanaition
Im at the code decoder stage right now and do not understand the strings well enough to try to manually do it
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| Posted: Sun Apr 25, 2010 9:56 pm |
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| vince213333 |
| Advanced user |
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| Joined: Aug 03, 2009 |
| Posts: 737 |
| Location: Belgium |
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| It's a bit confusing with the different 11... variables, I admit But that's the intention of the creaters of this encoding scheme, to make it harder to decode |
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| Posted: Mon Apr 26, 2010 8:20 pm |
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| fux0r360 |
| Active user |
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| Joined: Apr 25, 2010 |
| Posts: 25 |
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| Can someone point me to some good reads? |
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| Posted: Mon Apr 26, 2010 8:29 pm |
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| vince213333 |
| Advanced user |
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| Joined: Aug 03, 2009 |
| Posts: 737 |
| Location: Belgium |
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1. Basic PHP knowledge (google)
2. eval()
3. base64_decode() & base64_encode()
4. highlight_string()
is about all you need |
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