A lot do, the rest are mainly Somali government workers and students from Somalia who got scholarships, or people who came to start a business. Turkey has no time for freeloaders, which is good since it brings out the best in Somali's.
I would say 60-70% of Somali's either own an apartment or business here, rest are students.
I haven't really seen them wild out tbh, at least in Turkey. I haven't been to Malaysia enough to judge.
It is easy to wild out in Istanbul though, my corner shop sells vodka and I could buy it without an ID, the owner of the shop even says Salam to me when I enter, he's while selling alcohol as well