Unfortunately conditions in space and on the Moon & Mars are not very productive to life...
It's a few months to Mars, in the vacuum of space, with micro-organisms onboard... Most of those organisms would have died due to the extreme cold encountered in space, and if any survived long enough to reach the planet, they would have incinerated in the atmosphere during the landing procedure.
Plus, with no water, there's nothing to sustain the organisms... So there might be corpses of organisms there, but I would put my dollar against anyone else's that there's nothing alive.