Between 26 April and 5 July 1945, "Dufilho" joined in the Borneo operation, escorting shipping from the Philippines and Mios Woendi to Morotai in preparation for the landings at Tarakan and Brunei Bay in May and June. She convoyed reinforcements to Tarakan, and patrolled off the beaches during the assaults at Brunei Bay, escorted support troops in, and returned with empty landing craft to San Pedro Bay.