The log file of HitmanPro is attached. The path is: C:\Windows\system32\drivers\setup\hosts\hostsmon.exe, and the name (based on GData) is Backdoor.Generic.104430.
As I mentioned, the stupid thing was, why Avast IS didn't detected this file, which was for many days inside my computer, and why on Virustotal the same file was listed normally as trojan, by Avast itself!
On the same dir. "\drivers\setup\hosts", there were other infected files which Avast IS was able to detected and quarantined without any problem.
Regarding Hitman Pro, I rarely use it. But IMO it's a useful tool, in those case when the primary defense fails to do its job.