List of Lua viruses

In Roblox, a Lua virus is a type of malicious script that, when executed, replicates itself by modifying other parts and inserting its own code. When this replication succeeds, the affected areas are then said to be "infected" with a virus.

Lua virus writers use free models and plugins as a drive-by-attack to infect games. Different methods for infecting are used, such as by spreading a “Fire” object to every part, unanchoring everything in the game, or infecting every part with a script that is very tricky to remove. Motives for viruses vary, from demanding Robux, to sabotaging a game's core mechanics, to demanding free models being bought, to just no reason at all. Lua viruses are relatively harmless, however, some have been known to take control of games and insert inappropriate imagery as a form of ransomware.

The most common place to find a Lua virus is in the model and plugin category of the toolbox. Meshes, Audio, Images, and Video do not contain any sort of lua viruses so they're relatively safe.