If it had reached the Straits of Malacca, it would have flown over land. If the military were goingto shoot it down, it would surely be done before, not after, crossing a populated area. And I don't think there is ever a rogue plane - no communication assumption.
As the news ofthe 'tracking' came some days after, it's much more likely they are looking at potential anomalies on records from satellites (bit like checking CCTV footage) rather than there contemporaneous monitoring.
And as the search area has been extended (again), it looks as if there is still no real idea where the plane is. Btw, anyone know what happened re the two possible sightings of a plane acting strangely.