There are about 15 different distributions that produce interesting results if this is what you are looking for, but everyone's been using this for at least 10 years. OSBot is probably only using 1 of them but you can also look into Exponential, Gamma, Beta, Student, Chi Squared, Fisher, Normal and Standard distributions. Jagex does not perform any analysis of mouse data even if they collect it (since ~2013, they apparently did before) because it's too easy to counter. Machine learning will always produce 100% human like results which not even google can detect with the best programmers in the world, however machine learning is something which is quite out of reach for pretty much everyone who writes code for runescape bots.