Actually it's really hard to define if an ICO project is really a legit or scam, because there are lots of ICO's that is having a great whitepaper with a great team members but still a scam. It really takes a lot of time in researching about the ICO project that you want to invest in, but here's a thread that might help you with your problem, https://bitcointalk.org/index.php?topic=3177407.0 that thread contains of some helpful tips on how to not get scammed in investing to an ICO, you can freely visit that thread for more information. Hope it helps you with your problem.