I had similar experience, one a$$hole was super friendly and kissing every khairey's a$$ but would act very different towards me as if he didn't wanted to talk. I ignored him few months after that one nepali guy joined my team. I never talked to him first after that, if I needed info then only I would talk to him. Also, work wise he would bot get me any documents, so I would request couple time by emailing him personally and wait few days in between. If he didn't answer then I would email again saying that because of your no response blah blah is gettting delayed and cc his manager. I was really happy when he left the company.