Can't companies take action against ppl using nulled scripts?

About 80% of the ppl in pakistan having websites are using nulled scripts

Can't companies take action against them?

and if they can

what possible action they can take?

Companies can ask the service provider to take the sites offline. In case there is no compliance, a legal DMCA notice be sent to either the web host or the data center. Either of them are likely to take action in order to prevent any further legal issues.

However, offshore providers like those few in Russia or china are unlikely to comply.