Drawing on the advantageous characteristics of lattice structures and thin-walled tubes for better energy absorption and enhanced crashworthiness, this study investigates a crash box filled with hybrid lattice filler. We introduce two hybrid lattice structures, denoted as AuxCon hex-1 (AuxeticConventional Hexagon-1) and AuxCon hex-2 (AuxeticConventional Hexagon-2), which were designed by combining conventional honeycomb and auxetic honeycomb cells in two varied arrangements. These hybrid lattice configurations were used as fillers within a crash box. A numerical investigation of quasi-static compressive loading was conducted using ABAQUS™ Explicit solver to investigate the efficacy of the two hybrid filling structures on the energy absorption capacity of the crash box. The numerical approach was first validated with an experimental investigation reported in the literature for a thin-walled tube filled with a honeycomb lattice structure. The findings of this study show that the energy absorption is increased with the hybrid lattice, and more specifically, the crash box filled with AuxCon hex-1 hybrid lattice performs better. This research contributes valuable insights into the efficacy of hybrid lattice fillers in crash box applications, emphasizing their potential significance in advancing impact resistance through the tailored design of geometric and material parameters for optimized energy absorption capabilities.