I've got the same virus on the last two weeks and I found a tool by bitdefender which can decrypts the GDCB extension. however the grandcrab now is on v2.0 and the extension is CRAB !!
so our neighbors on bitdefender couldn't do it and I got the msg "Initialization FAILED!"
anyway I'm looking forward for a new tool maybe our godfather eset will do it in the next few weeks. I don't know how I got infected, I live in Syria and the internet is not that super fast.
I can wait anyway, the entire hard disk is infected, (recordings, family photos, all excel accounting files and logs .. every single important file) lucky me..
I've been using eset since 2008 and my computer is clean, but when I gave my old laptop to my parents there wasn't eset on it so you know the story ..
