Mod boxes are one of the rare items in wooden chests. When you open one of these boxes you will will receive one of the modded items available from the pool based on the researches you have already unlocked with your knowledge stars.
The items that can drop in order from common to rare are:
-Drawers: Storage upgrade template, Void Upgrade, Iron Storage Upgrade, Gold Storage Upgrade, Diamond Storage Upgrade, Obsidian Storage Upgrade, Framed Compacting Drawer, Framed Drawer controller, Emerald Storage Upgrade
-Refined Storage: Speed Upgrade, 1k Storage Disk, Stack Upgrade, 4k Storage Disk, External Storage, Disk Drive, Grid, 16k Storage Disk, Crafting Grid, 64k Storage Disk
-Applied Energistics: Fluix Smart Dense Cable, 1k Storage cell, Speed Card, 4k Storage disk,16k Storage Disk, Storage bus, Drive, Terminal, Crafting Terminal, 64k Storage Disk
-Powah: Furnator Starter, Solar Panel Starter, Thermo Generator Basic, Furnator Hardened, Solar Panel Hardened, Thermo Generator Basic, Furnator Blazing, Solar Panel Blazing, Thermo Generator Blazing, Energy Cell Blazing, Ender Cell Hardened, Energizing rod Niotic, Furnator Spirited, Thermo Generator Niotic, Energy Cell Spirited
-Thermal Dynamos: Stirling, Compression, Magmatic, Lapidary, Numismatic, Disenchantment, Gourmand (All dynamos have a equal chance of dropping)
-Thermal Expansion: Device Nullifier, Aqueous Acuumulator, Aquatic Entangler, Batch Composter, Sawmill, Blast Chiller, Vaccum, Igneous Extruder
-Mekanism Generators
-Create
-Mekanism
-Botania
-Easy Villagers