Troj/IRCBot-TC is a backdoor Trojan which allows a remote intruder to gain access and control over the computer.
When first run Troj/IRCBot-TC copies itself to <System>\lemsrv.exe.
The following registry entry is created to run lemsrv.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
LEMSRV
<System>\lemsrv.exe