194,6667,6660-7000 - Pentesting IRC
Basic Information
IRC is a text protocol. IANA assigns TCP 194 to IRC, while deployments have historically used TCP 6667 and adjacent unprivileged ports; modern networks also commonly offer TLS on 6697.[1][2]
Registration normally requires at least NICK and USER; a server may additionally require PASS, SASL, or other network-specific authentication. Reverse-DNS lookup is implementation/configuration dependent.[2]
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
The following raw session registers a random nickname and exercises useful enumeration commands. Command availability and permissions vary by daemon and network; the IRC command index provides additional commands to test where supported.[5]
#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 test server-password authentication when the service advertises or requires it. wealllikedebian appeared in an old Debian/ngIRCd sample configuration and is worth testing only when that specific legacy setup is identified; it is not a universal ngIRCd default.[3]
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>The NSE documentation describes the probes, output, and safety classification for these scripts.[4]
Brute Force
Shodan
looking up your hostname