Well, no. At least, not exactly. Necropanspermia piggybacks on the notion that the building blocks of life formed all over the place in space. The build starts because solar radiation would break down those building blocks and render them useless by the time they actually got to Earth, in one scenario, anyway. (But what if the building blocks are buried in a comet or something that shields at least some of them?) So, necropanspermia suggests that dead virus-like stuff might have made it through and provided the building blocks of life on Earth.
http://io9.com/5689476/necropanspermia-was-life-created-by-zombie-cells-from-outer-space
