The code execution tracer now eliminates some basic debugging artifacts. Generally non-packed applications will not perform these checks, but in case they do why not skip a couple of basic anti-debugging tricks?
This is not the main purpose of Shellter (you have read the ‘Readme.txt’, haven’t you?), but I thought it could be useful in some cases.
I might add more of those in the future, but for now the testing is mostly targeting the injection and post-injection stages.