I identified it with the help of user Red_Wolf_2 in IRC channel of Eligius.
It appears to be a "bitcoin-miner 0.20 Copyright (c) 2011 Ufasoft" in ./bin/iexplore.exe
and something that does not return anything in ./src/iexplore.exe
the 2nd one is probably a launcher. maybe running dormant.
I have a zip file with them if anyone is interested. Send me an email etc.
That user in that IRC channel already has it.
Ah, yahoo email identified an unpassworded zip with them as a virus but both avira and antimalwarebytes anti-malware does not detect them.
They required some ninja moves in cmd to make the folders and files visible for copying.
I removed those files, and dirs, and I suppose it won't come back. If it does come back, tough, I guess they might have a "parent creator" (rare).
If I'm gone and can't find me for those files, that user I mentioned may have it. Last I heard he identified the ./src file as being in .Net.