Reverse shell

gistfile1.txt

Infra:

- laptop
- server
- container where commands can be executed

Steps:

- install and run ssh on the container

    apt-get update && apt-get install -y ssh
    mkdir /run/sshd
    /usr/sbin/sshd
    
- create an account on server

    adduser reverse
    su reverse
    ssh-keygen
    cp /home/reverse/.ssh/id_rsa.pub /home/reverse/.ssh/authorized_keys
    chown 644 /home/reverse/.ssh/authorized_keys
    
- the container needs to be configured to connect to the server

    copy /home/reverse/.ssh/id_rsa to the container at /root/.ssh/id_rsa
    chmod 600 /root/.ssh/id_rsa
    ssh -o StrictHostKeyChecking=no -tt -i ~/.ssh/id_rsa -R 9999:localhost:22 reverse@<server ip>
    
- configure contaienr to accept your key

    copy your laptop ~/.ssh/id_rsa.pub and add it to container /root/.ssh/authorized_keys
    
- connect to the container

    ssh <server_ip> -A
    ssh -p 9999 root@localhost