Could we perhaps engineer something like a virus to attack the cancer cells or perhaps infect the cells with a virus, and use the mRNA to encourage the immune s

Could we perhaps engineer something like a virus to attack the cancer cells or perhaps infect the cells with a virus, and use the mRNA to encourage the immune system to attack the cancer cells infected with said virus? Sorry if all of this seems too sci-fi or utopian. I am not a biologist nor medical professional.