CTF-Writeups/stabilize shell.md

Stablilize Shell

1. ctrl+z
2. stty raw -echo
3. fg (press enter x2)
4. export TERM=xterm , for using clear command

Spawn bash

• /usr/bin/script -qc /bin/bash 1&>/dev/null
• python -c 'import pty;pty.spawn("/bin/bash")'
• python3 -c 'import pty;pty.spawn("/bin/bash")'

Finding Binaries

• find . - perm /4000 (user id uid)
• find . -perm /2000 (group id guid)

King Of The Hill (KoTH)

• strace debugging / tamper with processes
• gbd c/c++ debugger
• script - records terminal activites
• w /who check current pts ,terminal device
• ps -t ps/pts process monitoring
• script /dev/pts/ montior terminal
• cat /dev/urandom > /dev/pts/pts-number 2>/dev/null prints arbitary text on terminal

Closing Shells/Sessions

pkill -9 -t pts/pts-number

Changing file attributes

chattr + i filename making file immutable
chattr -i filename making file mutable
lschattr filename Checking file attributes