PokerStars No-Limit Hold'em, $0.05 BB (8 handed) - PokerStars Converter Tool from FlopTurnRiver.com

saw flop

UTG+1 ($7.68)
MP1 ($4.93)
MP2 ($6.85)
CO ($5.15)
Hero (Button) ($5.07)
SB ($5.08)
BB ($4.23)
UTG ($10.46)

Preflop: Hero is Button with ,
UTG bets $0.12, 3 folds, CO calls $0.12, Hero raises to $0.48, 3 folds, CO calls $0.36

Flop: ($1.15) , , (2 players)
CO checks, Hero bets $0.95, CO raises to $2.10, hero???

villain is complete unknown, seen him open raise 2 times in EP but he wasnt called and did nothing in rest, for about 10 hands that he has been at the table.

i have no ideea what he could play like this preflop and then postflop... i really dont know what range to give him here.... and really dont know how to react on his c/r... looks like a set, but if he is dumb enough to call small PP with no implied odds, cant he also do it with AJdd+ and then c/r this flop? i am really confused.... most of you are better then me so i wait for your opinions.