Executer is a Brazilian thrash metal band. They formed in the mid 80s in the city of Amparo, close to the metropolis of São Paulo.The founding line up was Juca on vocals and bass, Paulo and Elias on guitars, and Beba on drums. They recorded two demo tapes, well received on the times of tape trading between the bands and zines, and in 1990 they recorded and released their debut studio album, Rotten Authorities.