A summary of the Trojan repair method of PHP website

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In Linux we can use the command to search the Trojan file, to the code installation directory to execute the following command

The code is as follows	Copy Code
Find./-iname "*.php" \| Xargs grep-h-N "eval" (Base64_decode)

Search out close to 100 results, the result list is very important, Trojans are inside, to a file open to verify whether it is a trojan, if it is, immediately delete

Finally found 10 trojan files, stored in a variety of directories, are PHP Webshell, full-featured, with base64 code

If you look up directories in Windows and use Windows File Search directly, you can search for eval or recently modified files, and then if it is dedecms we want to check the latest dedecms vulnerabilities and fix them.

Here is a PHP Trojan lookup tool, directly to your site root directory

The code is as follows

Copy Code

<?php

/**************php Web Trojan scanner ************************/

/* [+] Author: Alibaba * *

/* [+] qq:1499281192 * www.111cn.net/

/* [+] msn:weeming21@hotmail.com * *

/* [+] Start: t00ls.net, reprint please specify T00LS * *

/* [+] Version: v1.0 * *

/* [+] Features: Web version of the PHP trojan scanning Tool * *

/* [+] Note: The scanned file is not necessarily the back door, * *

* Please judge, Audit, compare the original document. */

* * If you are not sure whether the scanned file is a back door, * *

* * You are welcome to send this document to me for analysis. */

/*******************************************************/

Ob_start ();

Set_time_limit (0);

$username = "T00ls"; Set User name

$password = "T00ls"; Set Password

$MD 5 = MD5 (MD5 ($USERNAME). MD5 ($password));

$version = "PHP Web Trojan Scanner v1.0";

PHP Web Trojan Scanner

$realpath = Realpath ('./');

$selfpath = $_server[' php_self '];

$selfpath = substr ($selfpath, 0, Strrpos ($selfpath, '/'));

Define (' Realpath ', str_replace ('//', '/', str_replace (' \ ', '/', substr ($realpath, 0, strlen ($realpath)-strlen ($ Selfpath)));

Define (' MYFILE ', basename (__file__));

Define (' MYPATH ', str_replace (' \ ', '/', dirname (__file__)). ' /');

Define (' Myfullpath ', str_replace (' \ ', '/', (__file__));

Define (' HOST ', "http://". $_server[' Http_host ');

<style>

body{margin:0px;}

BODY,TD{FONT:12PX arial,tahoma;line-height:16px;}

A {color: #00f; text-decoration:underline;}

A:hover{color: #f00; text-decoration:none;}

. ALT1 td{border-top:1px solid #fff; border-bottom:1px solid #ddd background: #f1f1f1;p adding:5px 10px 5px 5px;

. ALT2 td{border-top:1px solid #fff; border-bottom:1px solid #ddd background: #f9f9f9;p adding:5px 10px 5px 5px;

. Focus TD{BORDER-TOP:1PX Solid #fff border-bottom:1px solid #ddd background: #ffffaa;p adding:5px 10px 5px 5px;

. Head td{border-top:1px Solid #fff border-bottom:1px solid #ddd background: #e9e9e9;p adding:5px 10px 5px 5px; Font-weight:bold;}

. head TD Span{font-weight:normal;

</style>

<body>

<?php

if (!) ( Isset ($_cookie[' t00ls ']) && $_cookie[' t00ls '] = = $MD 5) &&! (Isset ($_post[' username ']) && isset ($_post[' password ']) && MD5 (MD5 ($_post[' username ')). MD5 ($_post [' Password ']) = = $MD 5)))

{

Echo ' <form id= "Frmlogin" name= "Frmlogin" method= "POST" action= "" > User name: <input type= "text" name= "username" id= " Username "/> Password: <input type=" password "name=" password "id=" password "/> <input type=" Submit "Name=" Btnlogin "Id=" Btnlogin "value=" Landing "/></form>";

}

ElseIf (isset ($_post[' username ')) && isset ($_post[' password ']) && (MD5 MD5 ($_post[' username ')). MD5 ( $_post[' password]) = = = $MD 5))

{

Setcookie ("T00ls", $md 5, Time () +60*60*24*365, "/");

echo "landed successfully! ";

Header (' refresh:1; Url= '. MYFILE. '? Action=scan ');

Exit ();

}

Else

{

Setcookie ("T00ls", $md 5, Time () +60*60*24*365, "/");

$setting = GetSetting ();

$action = Isset ($_get[' action ')] $_get[' action ': "";

if ($action = = "Logout")

{

Setcookie ("T00ls", "" ", Time ()-3600);

Header ("Location:"). MYFILE);

Exit ();

}

if ($action = = "Download" && isset ($_get[' file ')) && trim ($_get[' file '])!= "")

{

$file = $_get[' file '];

Ob_clean ();

if (@file_exists ($file)) {

Header ("Content-type:application/octet-stream");

Header ("Content-disposition:filename=". BaseName ($file). "" ");

Echo file_get_contents ($file);

}

Exit ();

}

<td><?php echo $_server[' server_addr ']?><span style= ' float:right; Font-weight:bold; " ><?php echo "<a href= ' http://www.t00ls.net/' > $version </a>"?></span></td>

</tr>

<a href= "? Action=scan" > Scan </a> |

<a href= "? action=setting" > Settings </a> |

<a href= "? action=logout" > Logout </a>

</td>

</tr>

</tbody></table>

<br>

<?php

if ($action = = "setting")

{

if (Isset ($_post[' btnsetting '))

{

$Ssetting = Array ();

$Ssetting [' User ']=isset ($_post[' checkuser '])? $_post[' checkuser ']: "PHP | php? | Phtml ";

$Ssetting [' All ']=isset ($_post[' Checkall ']) &&$_post[' Checkall ']== ' on '? 1:0;

$Ssetting [' HTA ']=isset ($_post[' Checkhta ']) &&$_post[' Checkhta ']== ' on '? 1:0;

Setcookie ("t00ls_s", Base64_encode (Serialize ($Ssetting)), Time () +60*60*24*365, "/");

echo "Setup Complete! ";

Header (' refresh:1; Url= '. MYFILE. '? Action=setting ');

Exit ();

}

<LEGEND> Scan Settings </LEGEND>

<tr>

<TD width= > file suffix:</td>

</tr>

<tr>

<td><label for= "Checkall" > All Files </label></td>

</tr>

<tr>

<td><label for= "Checkhta" > Settings file </label></td>

</tr>

<tr>

<td>

</td>

</tr>

</table>

</fieldset>

</form>

<?php

}

Else

{

$dir = isset ($_post[' path ')? $_post[' path ']:mypath;

$dir = substr ($dir, -1)!= "/"? $dir. " /": $dir;

<tr>

</tr>

</table>

</form>

<?php

if (Isset ($_post[' Btnscan '))

{

$start =mktime ();

$is _user = Array ();

$is _ext = "";

$list = "";

if (Trim ($setting [' user '])!= "")

{

$is _user = explode ("|"), $setting [' user ']);

if (count ($is _user) >0)

{

foreach ($is _user as $key => $value)

$is _user[$key]=trim (Str_replace ("?", "(.)", $value));

$is _ext = "(."). Implode ("($|.)) | (. ", $is _user)." ($|.))";

}

if ($setting [' HTA ']==1)

{

$is _hta=1;

$is _ext = strlen ($is _ext) >0 $is _ext. "|": $is _ext;

$is _ext.= "(^.htaccess$)";

}

if ($setting [' All ']==1 | | (Strlen ($is _ext) ==0 && $setting [' HTA ']==0)]

{

$is _ext= "(. +)";

}

$php _code = GetCode ();

if (!is_readable ($dir))

$dir = MYPATH;

$count = $scanned = 0;

Scan ($dir, $is _ext);

$end =mktime ();

$spent = ($end-$start);

<div style= "padding:10px; Background-color: #ccc "> Scan: <?php echo $scanned?> File | Discovery: <?php echo $count?> suspicious File | Time consuming: <?php Echo $spent?> sec </div>

<TD width= "12%" > Update time </td>

<TD width= "10%" > Reasons </td>

<TD width= "20%" > Features </td>

<td> Action </td>

</tr>

<?php Echo $list?>

</table>

<?php

}

Ob_flush ();

</body>

<?php

function Scan ($path = '. ', $is _ext) {

Global $php _code, $count, $scanned, $list;

$ignore = Array ('. ', ' ... ');

$replace =array ("", "N", "R", "T");

$DH = @opendir ($path);

while (false!== ($file =readdir ($DH))) {

if (!in_array ($file, $ignore)) {

if (Is_dir ("$path $file")) {

Scan ("$path $file/", $is _ext);

} else {

$current = $path. $file;

if (myfullpath== $current) continue;

if (!preg_match ("/$is _ext/i", $file)) continue;

if (is_readable ($current))

{

$scanned + +;

$content =file_get_contents ($current);

$content = Str_replace ($replace, "", $content);

foreach ($php _code as $key => $value)

{

if (Preg_match ("/$value/I", $content))

{

$count + +;

$j = $count% 2 + 1;

$filetime = Date (' y-m-d h:i:s ', Filemtime ($current));

$reason = Explode ("->", $key);

$url = Str_replace (Realpath,host, $current);

Preg_match ("/$value/I", $content, $arr);

$list. = "

<td> $count </td>

<td><a href= ' $url ' target= ' _blank ' > $current </a></td>

<td> $filetime </td>

<td><font color=red> $reason [0]</font></td>

<td><font color= #090 > $reason [1]</font></td>

<td><a href= '? action=download&file= $current ' target= ' _blank ' > Download </a></td>

</tr> ";

Echo $key. "-" . $path. $file. " (" . $arr [0]. ")" ." <br/> ";

Echo $path. $file. " <br/> ";

Break

}

Closedir ($DH);

}

function GetSetting ()

{

$Ssetting = Array ();

if (Isset ($_cookie[' t00ls_s '))

{

$Ssetting = Unserialize (Base64_decode ($_cookie[' t00ls_s '));

$Ssetting [' User ']=isset ($Ssetting [' user ']) $Ssetting [' User ']: "PHP | php? | phtml | sHTML ";

$Ssetting [' All ']=isset ($Ssetting [' All ']) intval ($Ssetting [' All ']): 0;

$Ssetting [' HTA ']=isset ($Ssetting [' HTA ']) intval ($Ssetting [' HTA ']): 1;

}

Else

{

$Ssetting [' user ']=] php | php? | phtml | sHTML ";

$Ssetting [' All ']=0;

$Ssetting [' HTA ']=1;

Setcookie ("t00ls_s", Base64_encode (Serialize ($Ssetting)), Time () +60*60*24*365, "/");

}

return $Ssetting;

}

function GetCode ()

{

Return Array (

' Backdoor features->cha88.cn ' => ' cha88.cn ',

' Backdoor features->c99shell ' => ' C99shell ',

' Backdoor features->phpspy ' => ' Phpspy ',

' Backdoor features->scanners ' => ' scanners ',

' Backdoor features->cmd.php ' => ' cmd.php ',

' Backdoor features->str_rot13 ' => ' str_rot13 ',

' Backdoor features->webshell ' => ' Webshell ',

' Backdoor features->egy_spider ' => ' Egy_spider ',

' Backdoor features->tools88.com ' => ' tools88.com ',

' Backdoor features->secforce ' => ' Secforce ',

' Backdoor feature->eval ('?> ' => ' eval (' | ')? > ',

' Suspicious code feature->system (' => ' System ('),

' Suspicious code feature->passthru (' => ' PassThru ('),

' Suspicious code feature->shell_exec (' => ' shell_exec ('),

' Suspicious code feature->exec ' (' => ' EXEC (',

' Suspicious code feature->popen (' => ' Popen ('),

' Suspicious code feature->proc_open ' => ' Proc_open ',

' Suspicious code feature->eval ($ ' => ' eval (' | ') | s*) \$ ',

' Suspicious code feature->assert ($ ' => ' assert (' | "| s*) \$ ',

' Dangerous MySQL code->returns string soname ' => ' returnsstringsoname ',

' Dangerous MySQL code->into outfile ' => ' intooutfile ',

' Dangerous MySQL code->load_file ' => ' Select (s+) (. *) Load_file ',

' Cryptographic Backdoor features->eval (gzinflate (' => ' eval (' gzinflate ',

' Cryptographic Backdoor features->eval (Base64_decode (' => ' eval (' Base64_decode ',

' Cryptographic Backdoor features->eval (gzuncompress (' => ' eval (' gzuncompress ',

' Cryptographic Backdoor features->eval (Gzdecode (' => ' eval (' Gzdecode ',

' Cryptographic Backdoor features->eval (str_rot13 (' => ' eval (' str_rot13 ',

' Cryptographic Backdoor features->gzuncompress (Base64_decode (' => ' gzuncompress ('),

' Cryptographic Backdoor features->base64_decode (gzuncompress (' => ' Base64_decode ('),

' A word back door feature->include ($_ ' => ' Include (' | ') s*) \$_ (post| Get| Request| Cookies) ',

' A word back door feature->call_user_func ("Assert" ' => ' Call_user_func ("| ') Assert (' | ') ',

' A word back door features->echo (file_get_contents ($_post/get/request/cookie ' => ' Echo (file_get_contents) (' | s*) \$_ (post| Get| Request| Cookies) ',

' Upload back door features->fputs (fopen ("?", "W"), $_post/get/request/cookie[' => ' fputs ((. +), (' | ') W (' | ')), (' | ') | s*) \$_ (post| Get| Request| Cookies) [',

'. htaccess features->sethandler application/x-httpd-php ' => ' sethandlerapplication/x-httpd-php ',

'. htaccess features->php_value auto_prepend_file ' => ' php_valueauto_prepend_file ',

'. htaccess features->php_value auto_append_file ' => ' php_valueauto_append_file '

);

}

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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A summary of the Trojan repair method of PHP website

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A summary of the Trojan repair method of PHP website

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