From Destinypedia, the Destiny wiki
Vandals are a class of Fallen warrior. They appear to be superior to Dregs, but subordinate to Captains. Their shock rifles have longer range than shock pistols used by Dregs, but take time to charge. They are occasionally armed with a Shrapnel Launcher, and at certain times, a Wire Rifle for long range shooting.
Savage pirates, Vandals take pride in every world they pillage and every body they drop. Soldiers, brawlers, assassins, and scouts, Vandals serve many roles within a Fallen crew. And whether from distance or up close and personal, they are seasoned, efficient killers, with an arsenal of weaponry and tech to match their bloodlust.
A Vandal can usually overcome a Hive Acolyte, depending on opposing levels. They can withstand a Titan's uncharged punch once, even on the lowest level, but a punch to the head usually ends them. In Destiny 2, Vandals are able to quickly cross the battlefield when on all 6 limbs. This makes them difficult to shoot at.
List of appearances