So, I failed at disabling McAfee to test, however, I found a workaround that works for me.
In my case it could be related to the way I connect to internet. I use an application which "allows network applications that do not support working through proxy servers to operate through a SOCKS or HTTPS proxy and chains". I use it to tunnel online games or, in this case, javaw.exe through the corporate proxy. So far I've had no issues with it.
However, if I leave it running while creating world then the game crashes. If I close it before pressing the Create New World button then the world is created and the game runs normally.
I found out that the issue also occurs in vanilla 1.7.10. so in my case there's probably nothing that mod devs can do about it. Sorry for taking up your time.