194,6667,6660-7000 - Pentesting IRC
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Basic Information
IRC, initially a plain text protocol, was assigned 194/TCP by IANA but is commonly run on 6667/TCP and similar ports to avoid needing root privileges for operation.
A nickname is all that's needed to connect to a server. Following connection, the server performs a reverse-DNS lookup on the user's IP.
Users are divided into operators, who need a username and password for more access, and regular users. Operators have varying levels of privileges, with administrators at the top.
Default ports: 194, 6667, 6660-7000
PORT STATE SERVICE
6667/tcp open ircEnumeration
Banner
IRC can support TLS.
nc -vn <IP> <PORT>
openssl s_client -connect <IP>:<PORT> -quietManual
Here you can see how to connect and access the IRC using some random nickname and then enumerate some interesting info. You can learn more commands of IRC here.
#Connection with random nickname
USER ran213eqdw123 0 * ran213eqdw123
NICK ran213eqdw123
#If a PING :<random> is responded you need to send
#PONG :<received random>
VERSION
HELP
INFO
LINKS
HELPOP USERCMDS
HELPOP OPERCMDS
OPERATOR CAPA
ADMIN #Admin info
USERS #Current number of users
TIME #Server's time
STATS a #Only operators should be able to run this
NAMES #List channel names and usernames inside of each channel -> Nombre del canal y nombre de las personas que estan dentro
LIST #List channel names along with channel banner
WHOIS <USERNAME> #WHOIS a username
USERHOST <USERNAME> #If available, get hostname of a user
USERIP <USERNAME> #If available, get ip of a user
JOIN <CHANNEL_NAME> #Connect to a channel
#Operator creds Brute-Force
OPER <USERNAME> <PASSWORD>You can, also, atttempt to login to the server with a password. The default password for ngIRCd is wealllikedebian.
PASS wealllikedebian
NICK patrick
USER test1 test2 <IP> :test3Find and scan IRC services
nmap -sV --script irc-botnet-channels,irc-info,irc-unrealircd-backdoor -p 194,6660-7000 <ip>Shodan
looking up your hostname
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