This was offered by Fernando Aquilini who runs Cause of Death zine blog: Cancer Social were from President Bernardes, Brazil. "Preocupados Com O Caos" was their demo tape recorded in 1995, ir delivers nine tracks of hardcore. The post in Cause of Death is in Portuguese so i can't understand what Fernando says, and from what i understand from babel translation is that the band was short lived.
Lyrics are Portuguese, the sound quality is in the usual levels of demo recordings:Noisy and raw
give it a try