So, this is the situation with my friend's PC. He called me over today to help him solve this. He couldn't specify exactly when or how this ransomware infected his PC.
Now, he did reinstall Windows after the infection(but no change whatsoever). I did some googling and found out that a particular website provided free service of file decryption regarding this ransomware but ''they've stopped the service'' now.
I installed Kaspersky on his PC, did a few scans & things. It caught some Trojans, viruses and successfully disinfected the PC.
But, how can I get those encrypted files back?