Search for exotic particles at NA62

NA62 is successfully running in the North Area of the CERN SPSwith the main goal of measuring the $BR(K^+ \to \pi^+ \nu \overline{\nu})$ with $10\%$ accuracy.Owing to the high beam energy and high beam intensity, the long decay volume and the hermetic detector coverage,NA62 also has the opportunity to directly search for aplethora of hidden-sector particles, both in visible or invisible final states.A large variety of searches for hidden sector particles can be performed using kaon decaysand broad and rich physics programme is being proposed for the 2021-2023 data taking, including$\sim 10^{18}$ protons-on-target (pot) collected when the experiment is operated in dump mode.We will detail the status of the first analysis based on the $2\times 10^{15}$ pot already collected in dump mode.