History
The Venom symbiote's history is presumably similar to its Earth-616 counterpart.
It took possession of Spider-Man during his time on Battleworld. Peter figured out the symbiote was alive early on. Mister Fantastic warned Peter that the symbiote was trying to bond with him, but Peter refused to get rid of it, insisting he needed the extra power it provided to make up for his waning powers due to age. When Kraven the Hunter buried Peter in a grave in a deranged attempt to take his place, Peter broke free thanks to the symbiote. Overwhelmed by the symbiote, Spider-Man hunted down Kraven and would have killed him if his wife Mary Jane hadn't intervened. Using a sonic pistol, Mary Jane separated the symbiote from Peter. The symbiote later approached Kraven who was about to kill himself and bonded with him.[1]