That's not greenish tint. That's clearly wrong Auto White Balance. The greenish/yellowish tint is mostly visible indoors low light with artificial light combined with underexposure. In these situations, the camera somehow is processing some "effects" into the image which make them appear washed out with green/yellow tint. The reason is the poor HIghIso Performance above ISO800. To avoid this, use low ISOs and slower shutter speeds (yea, the picture wont be as sharp) or simply underexpose a bit. As long as you stay <=800 the tint gets almost invisible. (see my thread for comparisons)
The auto white balance in the 925 is simply ****. Really. Especially when you go close to the subject, like you did, it will adjust completely wrong. Indoors, the Auto white balance also produces some weird stuff sometimes. Outdoors, in shadow areas, auto will also be wrong occasionally, then you need adjust manually.
However, after the Cyan Update, Auto White Balance got somehow better in my opinion, its a bit warmer under artificial light.