Koto was put in charge on a temporary basis after the dismissal of Amara Traore in February following a poor African Nations Cup competition for the team.
Senegal picked up four points from their opening two World Cup Group J matches last month - a home win over Liberia and a draw in Uganda.
In April, Senegal appointed Pierre Lechantre, a former Nations Cup winner, as coach only for the Frenchman to pull out of the deal just two weeks later.
Former international Koto is also coach of the Under-23 side who will compete this month in the men's football tournament at the London Olympics.
