Legal way to know if a job offer is real or scam

How can I know if a company is legally working in the UAE from India?

I was interviewed by an overseas ministry agent company for a job abroad in Abu Dhabi named Continental Securities Ltd.

How can I know this company has existence in Abu Dhabi and it's not a fraud?

It's been 65 days since I was interviewed by the agent on March 23, 2018.

Please guide me.