Mohd Syamsul Mohd Yusof is a Malaysian actor, film director, writer, producer and singer. He is the son of producer and director Yusof Haslam. He is the youngest director to win the Malaysian Film Festival for Best Director award, doing so at the age of 25.

Munafik is a 2016 Malaysian Malay-language supernatural horror film directed by Syamsul Yusof. It was his ninth film as well as his second horror film after Khurafat (2011) and also the first film in a planned Munafik trilogy. It stars Syamsul himself, Fizz Fairuz, Pekin Ibrahim and Nabila Huda. The film depicts Adam, a Muslim medical practitioner who is unable to continue with his job and accept the reality of his wife's death. After he meets Maria, unsettling things start to happen.