New result on Σ(1385) sub-threshold production in Al+Al collisions at beam kinetic energy of 1.9A GeV, measured with the FOPI detector at GSI-Darmstadt, is presented. This measurement allows a better understanding of strangeness sub-threshold production and leads to information on strangeness exchange reactions dominant in the K- production at SIS energies. This measurement is used as a base to perform other analyses like Λ-proton correlations in the search for multi-baryonic states.