Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
molest [məˈlɛst] vt (assault sexually) надруга́ться (perf) над +instr ; (harass) трави́ть*(затрави́ть*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.