Catalysis of the transfer of an oleoyl (systematic name, (9Z)-octadecenoyl) group to a sulfur atom on the cysteine of a protein molecule, in the reaction: (9Z)-octadecenoyl-CoA + L-cysteinyl- = CoA + S-(9Z-octadecenoyl)-L-cysteinyl-.
protein-cysteine S-oleoyltransferase activity