A penetration tester evaluates a company's susceptibility to advanced social engineering attacks targeting its executive...

A penetration tester evaluates a company's susceptibility to advanced social engineering attacks targeting its executive team. Using detailed knowledge of recent financial audits and ongoing projects, the tester crafts a highly credible pretext to deceive executives into revealing their network credentials. What is the most effective social engineering technique the tester should employ to obtain the necessary credentials without raising suspicion?