在linux中我们可以使用命令来搜查木马文件,到代码安装目录执行下面命令
复制代码 代码如下:
find ./ -iname "*.php" | xargs grep -H -n "eval(base64_decode"
搜出来接近100条结果，这个结果列表很重要，木马都在里面，要一个一个文件打开验证是否是木马，如果是，马上删除掉
最后找到10个木马文件，存放在各种目录，都是php webshell，功能很齐全，用base64编码
如果你在windows中查找目录直接使用windows文件搜索就可以了，可以搜索eval或最近修改文件，然后如果是dedecms我们要查看最新dedecms漏洞呀然后修补。
下面给个php木马查找工具,直接放到你站点根目录
复制代码 代码如下:
<?php
/**************PHP Web木马扫描器************************/
/* [+] 作者: alibaba */
/* [+] MSN: weeming21@hotmail.com */
/* [+] 首发: t00ls.net , 转载请注明t00ls */
/* [+] 版本: v1.0 */
/* [+] 功能: web版php木马扫描工具*/
/* [+] 注意: 扫描出来的文件并不一定就是后门, */
/* 请自行判断、审核、对比原文件。*/
/* 如果你不确定扫出来的文件是否为后门，*/
/* 欢迎你把该文件发给我进行分析。*/
/*******************************************************/
ob_start();
set_time_limit(0);
$username = "t00ls"; //设置用户名
$password = "t00ls"; //设置密码
$md5 = md5(md5($username).md5($password));
$version = "PHP Web木马扫描器v1.0";
PHP Web 木马扫描器
$realpath = realpath('./');
$selfpath = $_SERVER['PHP_SELF'];
$selfpath = substr($selfpath, 0, strrpos($selfpath,'https://www.jb51.net/'));
define('REALPATH', str_replace('//','https://www.jb51.net/',str_replace('\','https://www.jb51.net/',substr($realpath, 0, strlen($realpath) - strlen($selfpath)))));
define('MYFILE', basename(__FILE__));
define('MYPATH', str_replace('\', 'https://www.jb51.net/', dirname(__FILE__)).'https://www.jb51.net/');
define('MYFULLPATH', str_replace('\', 'https://www.jb51.net/', (__FILE__)));
define('HOST', "http://".$_SERVER['HTTP_HOST']);
?>
<html>
<head>
<title><?php echo $version?></title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
body{margin:0px;}
body,td{font: 12px Arial,Tahoma;line-height: 16px;}
a {color: #00f;text-decoration:underline;}
a:hover{color: #f00;text-decoration:none;}
.alt1 td{border-top:1px solid #fff;border-bottom:1px solid #ddd;background:#f1f1f1;padding:5px 10px 5px 5px;}
.alt2 td{border-top:1px solid #fff;border-bottom:1px solid #ddd;background:#f9f9f9;padding:5px 10px 5px 5px;}
.focus td{border-top:1px solid #fff;border-bottom:1px solid #ddd;background:#ffffaa;padding:5px 10px 5px 5px;}
.head td{border-top:1px solid #fff;border-bottom:1px solid #ddd;background:#e9e9e9;padding:5px 10px 5px 5px;font-weight:bold;}
.head td span{font-weight:normal;}
</style>
</head>
<body>
<?php
if(!(isset($_COOKIE['t00ls']) && $_COOKIE['t00ls'] == $md5) && !(isset($_POST['username']) && isset($_POST['password']) && (md5(md5($_POST['username']).md5($_POST['password']))==$md5)))
{
echo '<form method="post" action="">用户名: <input type="text" /> 密码: <input type="password" /> <input type="submit" value="登陆" /></form>';
}
elseif(isset($_POST['username']) && isset($_POST['password']) && (md5(md5($_POST['username']).md5($_POST['password']))==$md5))
{
setcookie("t00ls", $md5, time()+60*60*24*365,"https://www.jb51.net/");
echo "登陆成功！";
header( 'refresh: 1; url='.MYFILE.'?action=scan' );
exit();
}
else
{
setcookie("t00ls", $md5, time()+60*60*24*365,"https://www.jb51.net/");
$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 cellpadding="0" cellspacing="0">
<tbody><tr>
<td><?php echo $_SERVER['SERVER_ADDR']?><span><?php echo "<a href='https://www.t00ls.net/'>$version</a>"?></span></td>
</tr>
<tr>
<td><span><?=date("Y-m-d H:i:s",mktime())?></span>
<a href="?action=scan">扫描</a> |
<a href="?action=setting">设定</a> |
<a href="?action=logout">登出</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,"https://www.jb51.net/");
echo "设置完成！";
header( 'refresh: 1; url='.MYFILE.'?action=setting' );
exit();
}
?>
<form method="post" action="?action=setting">
<FIELDSET>
<LEGEND>扫描设定</LEGEND>
<table cellspacing="0" cellpadding="0">
<tr>
<td>文件后缀:</td>
<td><input type="text" value="<?php echo $setting['user']?>"></td>
</tr>
<tr>
<td><label for="checkall">所有文件</label></td>
<td><input type="checkbox" <?php if($setting['all']==1) echo "checked"?>></td>
</tr>
<tr>
<td><label for="checkhta">设置文件</label></td>
<td><input type="checkbox" <?php if($setting['hta']==1) echo "checked"?>></td>
</tr>
<tr>
<td> </td>
<td>
<input type="submit" value="提交">
</td>
</tr>
</table>
</fieldset>
</form>
<?php
}
else
{
$dir = isset($_POST['path'])?$_POST['path']:MYPATH;
$dir = substr($dir,-1)!="https://www.jb51.net/"?$dir."https://www.jb51.net/":$dir;
?>
<form method="post" action="">
<table cellspacing="0" cellpadding="0">
<tr>
<td>扫描路径:</td>
<td>
<input type="text" value="<?php echo $dir?>">
<input type="submit" value="开始扫描"></td>
</tr>
</table()>
</form>
<?php
if(isset($_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>扫描: <?php echo $scanned?> 文件| 发现: <?php echo $count?> 可疑文件| 耗时: <?php echo $spent?> 秒</div>
<table cellspacing="0" cellpadding="0">
<tr>
<td>No.</td>
<td>文件</td>
<td>更新时间</td>
<td>原因</td>
<td>特征</td>
<td>动作</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 );