With the new year, 1943, "Pruitt" shifted south and trained with the 4th Marine Raider Battalion off Southern California. Further escort assignments followed and on 24 April she departed San Francisco, California to return to the Aleutians. Sailing with TF 51, she steamed to Cold Bay, thence to Attu. On 11 May, she arrived off the latter, escorted landing craft into Massacre Bay, and then dispatched the boat waves. After the initial assault she took up anti-submarine and anti-aircraft patrols. Later shifting to Holtz Bay, she continued to perform patrol duties and to escort smaller craft from Amchitka and Adak until the end of the month.