I use the word "decrypter" loosely, but it is what the site's
advertising it to be.

So I wrote a PHP script that takes hashes from a database
(columns are as such: id, hash, unhashed)
and checks them against md5-decrypter.com and md5decryption.com

these sites have no captcha protection (and over 4.7mil stored hashes)

<?php
set_time_limit(0);

$db_host = "localhost"; //if your port is different then default, add
a colon : and the port number (ex localhost:1337)
$db_user = "user";
$db_password = "pass";
$db_name = "db";
$db_table ="table";
$table_id_field = "id"; //change this if the unique ID field is called
something else. (ie Id, ID)
$table_hash = "hash"; //change this if the hash field is called something else
$table_plaintext = "dehashed"; //change this for where the plain text
version of the password will be updated to

//dont change anything below here unless you know what you are doing

mysql_connect($db_host, $db_user, $db_password);

mysql_select_db($db_name) or die(mysql_error());

$query = "SELECT * FROM " . $db_table . " limit 1";
  
$result = mysql_query($query) or die(mysql_error());

function get_string_between($string, $start, $end){
  $string = " ".$string;
  $ini = strpos($string,$start);
  if ($ini == 0) return "";
  $ini += strlen($start);
  $len = strpos($string,$end,$ini) - $ini;
  return mysql_real_escape_string(substr($string,$ini,$len));
}

function give_back($url, $post, $text){
  $posted_vars = $post . "=" . $text;
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
  curl_setopt($ch, CURLOPT_REFERER, $url);
  curl_setopt($ch, CURLOPT_URL,$url);
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $posted_vars);
  curl_exec($ch);
  curl_close($ch);
  unset($ch);
}

function do_except($num, $plaintext){
  if($num !=1){
    give_back("http://md5-encryption.com/", "data[Row][clear]", $plaintext);    
  }

  if($num !=2){
    give_back("http://md5encryption.com/", "submit=Encrypt%20It!&word",
$plaintext);
  }
}
function fetch_md5($url, $post, $start, $end, $trim, $hash){
  $posted_vars = $post . "=" . $hash;
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
  curl_setopt($ch, CURLOPT_REFERER, $url);
  curl_setopt($ch, CURLOPT_URL,$url);
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $posted_vars);
  $fetched_page = curl_exec($ch);
  curl_close($ch);
  unset($ch);

  $password = get_string_between($fetched_page, $start, $end);

  if(isset($trim) && !empty($trim)){
    $password = substr($password, $trim);
  }

  return $password;
}

function update_plaintext($table_name, $id_field, $row_id, $plaintext,
$dehashed){ //table name, table id field, row id value, the table
plaintext field, the dehashed password
  $sql = "update $table_name set $plaintext = '$dehashed' where
$id_field = '$row_id'";
  mysql_query($sql);
}

while($row = mysql_fetch_array($result)){

  $password1 = fetch_md5("http://md5-decrypter.com/",
"data[Row][cripted]", "Decrypted text:</b>", "</b>", "21",
$row[$table_hash]);

  if(!empty($password1)){
    update_plaintext($db_table, $table_id_field, $row[$table_id_field],
$table_plaintext, $password1);
    if($giveback == "1"){
      do_except("1", $password1);
    }
    continue;
  }

  $password2 = fetch_md5("http://md5decryption.com/",
"submit=Decrypt%20It!&hash", "Decrypted Text: </b>", "</font><br/>",
"", $row[$table_hash]);

  if(!empty($password2)){
    update_plaintext($db_table, $table_id_field, $row[$table_id_field],
$table_plaintext, $password2);
    if($giveback == "1"){
      do_except("2", $password2);
    }
    continue;
  }

}
?>
http://pastebin.com/idGqmqAg