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  • Basic Information
  • Enumeration
  • Banner
  • Manual
  • Find and scan IRC services

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  1. Network Pentesting

IRC - Ports 194,6667,6660-7000

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.

PreviousSNMP - Ports 161, 162, 10161, and 10162/UDPNextCheck Point Firewall - Port 264

Last updated 2 months ago

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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  irc

Enumeration

Banner

IRC can support TLS.

nc -vn <IP> <PORT>
openssl s_client -connect <IP>:<PORT> -quiet

Manual

#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> :test3

Find and scan IRC services

nmap -sV --script irc-botnet-channels,irc-info,irc-unrealircd-backdoor -p 194,6660-7000 <ip>
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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 .

Learn & practice

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