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Step to Decode php Based Byterun

Yesterday I was having an issue with a script (and I pay for that!). Well, the seller used a simple eval based encode and I have seen a lot of those around. So I try figured out how to decode the file and I would like present to you a script that will do it for you. Your mileage might vary. cerutu

if( $_POST[‘submit’] ){
$contents = $_POST[‘encode’];
$contents = base64_decode($contents);
$contents = strtr($contents, “123456aouie”, “aouie123456″);

$fp = fopen(“decoded.php”,”w”);
fwrite($fp, trim($contents));

echo “<center>Decoded Byterun Success<br />”;
echo “Decoded results are stored in files decoded.php at the same directory folder of decoder script.<br />”;
echo “More decode? <a href=’./byterun.php’>click here</a></center>”;
} else {
<html><head><title>Byterun Decoder</title></head>
<h1>Byterun Encode Decoder Scrypt</h1>
<span style=”color:#ff0000;”><?php</span> $_F=<span style=”color:#0000ff;”>__FILE__</span>;$_X='<span style=”color:#ff0000;”>DECODED CONTENT</span>';<span style=”color:#0000ff;”>eval</span>(base64_decode(‘decoded text’)); <span style=”color:#ff0000;”>?></span>
<br />enter the <span style=”color:#ff0000;”>DECODED CONTENT</span> ONLY!
<br />Perhatikan pada ‘<span style=”color:#ff0000;”>DECODED CONTENT</span>’ quotes <span style=”color:#0000ff;”>not included!</span>

<form method=”post” action=””>
<textarea name=”encode” rows=”15″ cols=”100″></textarea>
<br /><br />
<input type=”submit” name=”submit” value=”Decode Rubbish!”>
<?php } ?>

<?php $_F=__FILE__;$_X='<span style=”color:#ff0000;”>encrypted text</span>';eval(base64_decode(‘<span style=”color:#ff0000;”>rubbish</span>’));?>
Paste just the red ‘encrypted text‘ section in to the top box and hit Decode.

You can try my byterun decoder.

One Comment

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