What to use to kill black mold in attic crawl space?

So I have an attic crawl space, and the exhaust from by downstairs bathroom vents right into this attic, not to the outside. This has presumably caused the black mold that is growing all over the sheathing of this attic crawl space. I'm planning on removing the vent completely and sheet-rocking over it, but I obviously need to kill the mold as well. I've been doing some research,and thus far it seems as if alcohol is the best solution to kill this mold. Bleach is apparently not as good for killing this type of mold. Any advice for what to use, or how to accomplish my DIY mold remediation?