I'm making a prediction.
Within a couple weeks the plane will make it's location known.
Here is what I think has happened.
Pilots or someone forced the plane off course and landed safely somewhere in jihadland. The hajis are taking the time to give her a less visible paint job, take off a lot of tracking stuff, and load her down with explosives.
They are either going to have to get the fuel, or they already have it.
Anyway, when all is ready, the plane will take off and one day we will see a news story about a massive explosion somewhere, and there will be reports about a low flying jet in the area just before.
It's been stolen to be used as a flying bomb, I bet. And the passengers were either killed by decompression, or executed upon landing.