According to a statement by the airline, they said “Aeroflot extends its deepest condolences to the family and loved ones of those who lost their lives on flight SU1492 Moscow-Murmansk. The crew did everything on its power to save passenger lives and provide emergency assistance to those involved. Tragically, they were unable to save all those aboard.”
The system failure was due to a lightning strike on the plane. Lots of video have emerged online of the horrific landing.