Patch Available - KMST 1.2.493

Do you think any of the monster's attack and defense has been buffed in anyway?

I doubt it. It didn't make any mention of it in the patch notes. The only stated changes were HP buffs and EXP increase. I wouldn't expect a defense increase on monsters ever, unless they make a high level zone. Not sure if lower level areas (1~100) would require damage buffs. It'd be a huge inconvenience to new players, since they're the ones most affected by it. Experienced players would just be able to buy more potions or know how to avoid damage more easily.