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Summary of php website Trojan repair methods

Source: Internet
Author: User
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The most important thing for php websites to be repaired by Trojans is how to fix the issue and prevent trojans from being injected into your website, next, I will summarize the methods for repairing php website Trojans and preventing websites from sending Trojans again.

In linux, we can use commands to search Trojan Files and run the following commands in the Code installation directory:

The Code is as follows: Copy code

Find./-iname "*. php" | xargs grep-H-n "eval (base64_decode"

Nearly 100 results are found. This list of results is very important. All Trojans are in it. You need to open a file one by one to verify whether the results are Trojans. If yes, delete them immediately.

Finally, we found 10 Trojan Files and stored them in various directories, all of which are php webshells. The functions are complete and base64-encoded.

If you search for directories in windows and use windows files, you can search for eval or recently modified files. If dedecms is used, check the latest dedecms vulnerability and fix it.


The following is a php Trojan search tool, which is directly placed in the root directory of your site.

The Code is as follows: Copy code

<? Php

/************* PHP Web Trojan scanner ********************* ***/

/* [+] By alibaba */

/* [+] QQ: 1499281192 * www. bKjia. c0m/

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

/* [+] Initial release: t00ls.net. For details, refer to t00ls */

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

/* [+] Function: php Trojan scanning tool for the web version */

/* [+] Note: The scanned file is not necessarily a backdoor ,*/

/* Determine, review, and compare the original file by yourself. */

/* If you are not sure whether the scanned file is a backdoor ,*/

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

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

Ob_start ();

Set_time_limit (0 );

$ Username = "t00ls"; // set the user name

$ Password = "t00ls"; // set the password

$ Md5 = 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']);

?>

<Html>

<Head>

<Title> <? Php echo $ version?> </Title>

<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>

<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; padding: 5px 10px 5px 5px ;}

. Alt2 td {border-top: 1px solid # fff; border-bottom: 1px solid # ddd; background: # f9f9f9; padding: 5px 10px 5px ;}

. Focus td {border-top: 1px solid # fff; border-bottom: 1px solid # ddd; background: # ffffaa; padding: 5px 10px 5px 5px ;}

. Head td {border-top: 1px solid # fff; border-bottom: 1px solid # ddd; background: # e9e9e9; padding: 5px 10px 5px 5px; font-weight: bold ;}

. Head td span {font-weight: normal ;}

</Style>

</Head>

<Body>

<? Php

If (! (Isset ($ _ COOKIE ['t00ls']) & $ _ COOKIE ['t00ls'] = $ md5 )&&! (Isset ($ _ POST ['username']) & isset ($ _ POST ['Password']) & (md5 (md5 ($ _ POST ['username']). md5 ($ _ POST ['Password']) = $ md5 )))

{

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 = "Login "/> </form> ';

}

Elseif (isset ($ _ POST ['username']) & isset ($ _ POST ['Password']) & (md5 (md5 ($ _ POST ['username']). md5 ($ _ POST ['Password']) = $ md5 ))

{

Setcookie ("t00ls", $ md5, time () + 60*60*24*365 ,"/");

Echo "Login successful! ";

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

Exit ();

}

Else

{

Setcookie ("t00ls", $ md5, 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 ();

}

?>

<Table border = "0" cellpadding = "0" cellspacing = "0" width = "100%">

<Tbody> <tr class = "head">

<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>

<Tr class = "alt1">

<Td> <span style = "float: right;"> <? = Date ("Y-m-d H: I: s", mktime ()?> </Span>

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

<A href = "? Action = setting "> set </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 "Settings complete! ";

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

Exit ();

}

?>

<Form name = "frmSetting" method = "post" action = "? Action = setting ">

<FIELDSET style = "width: 400px">

<LEGEND> scan Settings </LEGEND>

<Table width = "100%" border = "0" cellspacing = "0" cellpadding = "0">

<Tr>

<Td width = "60"> file Suffix: </td>

<Td width = "300"> <input type = "text" name = "checkuser" id = "checkuser" style = "width: 300px;" value = "<? Php echo $ setting ['user']?> "> </Td>

</Tr>

<Tr>

<Td> <label for = "checkall"> all files </label> </td>

<Td> <input type = "checkbox" name = "checkall" id = "checkall" <? Php if ($ setting ['all'] = 1) echo "checked"?> </Td>

</Tr>

<Tr>

<Td> <label for = "checkhta"> setting file </label> </td>

<Td> <input type = "checkbox" name = "checkhta" id = "checkhta" <? Php if ($ setting ['hta'] = 1) echo "checked"?> </Td>

</Tr>

<Tr>

<Td> & nbsp; </td>

<Td>

<Input type = "submit" name = "btnsetting" id = "btnsetting" value = "submit">

</Td>

</Tr>

</Table>

</Fieldset>

</Form>

<? Php

}

Else

{

$ Dir = isset ($ _ POST ['path'])? $ _ POST ['path']: MYPATH;

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

?>

<Form name = "frmScan" method = "post" action = "">

<Table width = "100% %" border = "0" cellspacing = "0" cellpadding = "0">

<Tr>

<Td width = "35" style = "vertical-align: middle; padding-left: 5px;"> scan path: </td>

& Lt; td width = "690" & gt;

<Input type = "text" name = "path" id = "path" style = "width: 600px" value = "<? Php echo $ dir?> ">

& Nbsp; <input type = "submit" name = "btnScan" id = "btnScan" value = "Start scan"> </td>

</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 | found: <? Php echo $ count?> Suspicious File | time consumed: <? Php echo $ spent?> Seconds </div>

<Table width = "100%" border = "0" cellspacing = "0" cellpadding = "0">

<Tr class = "head">

<Td width = "15" align = "center"> No. </td>

<Td width = "48%"> file </td>

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

<Td width = "10%"> cause </td>

<Td width = "20%"> features </td>

<Td> action </td>

</Tr>

<? Php echo $ list?>

</Table>

<? Php

}

}

}

Ob_flush ();

?>

</Body>

</Html>

<? 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. ="

<Tr class = 'alt $ J' onmouseover = 'this. className = "focus"; 'onmouseout = 'this. className = "alt $ j"; '>

<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 ',

'Webshell' => 'webshell ',

'Backdoor features-> EgY_SpIdEr '=> 'egy _ SpIdEr ',

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

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

'Backdoor features-> eval ("?> '=> 'Eval (' | ")?> ',

'Suspicious code features-> system ('=> 'System (',

'Suspicious code features-> passthru ('=> 'passthru (',

'Suspicious code features-> shell_exec ('=> 'Shell _ exec (',

'Suspicious code features-> exec ('=> 'exec (',

'Suspicious code features-> popen ('=> 'popen (',

'Suspicious code features-> proc_open '=> 'proc _ open ',

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

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

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

'Dangerous MYSQL code-> into outfile' => 'invalid outfile ',

'Dangerous MYSQL code-> load_file '=> 'select (s +) (. *) load_file ',

'Encrypted backdoor features-> eval (gzinflate ('=> 'eval (gzinflate (',

'Encrypted backdoor features-> eval (base64_decode ('=> 'eval (base64_decode (',

'Encrypted backdoor features-> eval (gzuncompress ('=> 'eval (gzuncompress (',

'Encrypted backdoor features-> eval (gzdecode ('=> 'eval (gzdecode (',

'Encrypted backdoor features-> eval (str_rot13 ('=> 'eval (str_rot13 (',

'Encrypted backdoor features-> gzuncompress (base64_decode ('=>' gzuncompress (base64_decode (',

'Encrypted backdoor features-> base64_decode (gzuncompress ('=> 'base64 _ decode (gzuncompress (',

'One-sentence backdoor feature-> eval ($ _ '=> 'eval (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'One-sentence backdoor feature-> assert ($ _ '=> 'assert (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Webshell features in one sentence-> require ($ _ '=> 'require (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Webshell features in one sentence-> require_once ($ _ '=> 'require _ once (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Backdoor features in one sentence-> include ($ _ '=>' include ('| "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'One-sentence backdoor feature-> include_once ($ _ '=> 'include _ once (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Backdoor features in one sentence-> call_user_func ("assert" '=> 'call _ user_func ("|') assert (" | ')',

'Webshell features in one sentence-> call_user_func ($ _ '=> 'call _ user_func (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Webshell features in one sentence-> $ _ POST/GET/REQUEST/COOKIE [?] ($ _ POST/GET/REQUEST/COOKIE [?] '=>' $ _ (POST | GET | REQUEST | COOKIE) [([^] +)] ('| "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )[',

'Backdoor features in one sentence-> echo (file_get_contents ($ _ POST/GET/REQUEST/COOKIE '=> 'echo (file_get_contents (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Upload backdoor features-> file_put_contents ($ _ POST/GET/REQUEST/COOKIE, $ _ POST/GET/REQUEST/COOKIE '=> 'file _ put_contents (' | "| s *) \ $ _ (POST | GET | REQUEST | COOKIE) [([^] +)], ('| "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )',

'Upload backdoor features-> fputs (fopen ("? "," W "), $ _ POST/GET/REQUEST/COOKIE ['=> 'fputs (fopen ((. +), ('| ") w (' |"), ('| "| s *) \ $ _ (POST | GET | REQUEST | COOKIE )[',

'. Htaccess plug-in Feature-> SetHandler application/x-httpd-php' => 'sethandlerapplication/x-httpd-php ',

'. Htaccess plug-in Feature-> php_value auto_prepend_file' => 'php _ valueauto_prepend_file ',

'. Htaccess plug-in Feature-> 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.

Related Keywords:
website trojan scanner of authentication methods methods of string class methods of thread class types of casting methods types of search methods methods of sending messages

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