Trojans are malicious applications that pose themselves as legitimate software in order to trick users to install them. Once on the victim's machine, it may run any number of malicious process to steal vital information or inflict damage to other software.
Backdoor.IrcUnd is a Backdoor Trojan that gives an attacker unauthorized access to an infected computer. By default, it opens port 6667 on an infected computer.
The Bot module of Trojan provides an invader with illegal remote admittance to the compromised system and the invader can carry out the following events on this infected machine:
-> Connect to download files from the URLs
-> Execute programs remotely
-> Perform DDOS
-> Start and stop services
-> Retrieve system information
-> Uninstall the bot
Once running, the bot module connects to a predefined IRC server and channel on a predefined port , awaiting commands from the invader.