Backdoor.Win32.Agent.bctb is a backdoor Trojan that can put a compromised PC at great risk. Backdoor.Win32.Agent.bctb will open a backdoor into an infected PC and give a remote attacker access to confidential data on the system. Additional malware may also be passed through the backdoor which will cause even more damage to a system. Backdoor.Win32.Agent.bctb may also turn a compromised PC into a bot that can be used in malicious Distributed Denial of Service attacks. This threat is not to be taken lightly and should be removed from an infected system as soon as possible.