During the covid-19 pandemic in Brazil, it was observed that a great number of false messages circulated on social media. Most of these messages featured scientific and technological elements. This article analyzes how scientific and technological aspects were used in false messages about the pandemic. From the Latam Chequea Coronavírus databank, we have compiled 152 false messages that featured the inappropriate use of scientific knowledge. The results showed that false messages appropriated science and technology to usurp their social value in search of credibility. To achieve this, the fake news used verbal-visual resources, authorities and mixed true and false information