Datuk Seri Mustafar Ali, director-general of Malaysia's Immigration Department, told CNN on Tuesday that authorities are seeking the North Korean workers.
"We will definitely go after them as their work permits have expired, and thus they are considered illegal workers," he said. "But first we would like to give them or their employers a week's notice to voluntarily turn them in."
Ali would not say which companies the men worked for but said they were in the coal and construction industries.
North Koreans have been employed in the Malaysian coal industry in the past.
In 2014, 46 North Koreans were employed at the Selantik coal mine in Sarawak when an explosion hit, killing three people -- including a North Korean -- according to Bernama.
The deputy minister of home affairs at the time, Datuk Seri Wan Junaidi Tuanku Jaafar, told reporters the North Koreans were brought in to work via a special arrangement between the Sarawak and North Korean governments because locals would not take the jobs and specialized workers were needed.
CNNMoney's Jethro Mullen contributed to this report.