The Beastie Boys are suing the bosses of a popular energy drink company for alleged copyright infringement.
The band lodged papers in Manhattan federal court in New York on Wednesday, claiming executive of the Monster energy drink company have been using their tracks in a promotional video and downloadable audio file without their permission.
The lawsuit emerged two days after the will of the late Adam "MCA" Yauch, lead singer of the Beastie Boys, was filed in Manhattan Surrogate Court.
The documents reveal Yauch had amassed a fortune of $US6.4 million ($A6.08 million), which will be placed in a trust fund for his wife Dechen and their 13-year-old daughter. Yauch's widow has been granted the right to sell and manage his artistic property.
However, the hip-hop star, who died from cancer on May 4, has banned the use of his image, music and art for advertising purposes.