Filoviruses (ebolaviruses and marburgviruses) cause severe hemorrhagic fever in humans and nonhuman primates with high mortality rates of up to 90 %. The latest epidemic of Ebola virus disease in Western African countries has underscored the urgent need for effective prophylactic and therapeutic interventions for this deadly infectious disease. However, neither approved prophylactics nor therapeutics are currently available for filovirus diseases. Recent studies have been unveiling the molecular mechanisms underlying the filovirus lifecycle, including cellular entry, egress, and the evasion from host immunity, suggesting possibilities to develop effective pan-filovirus drugs.