The FBI mentioned four common scams to watch out for: non-delivery scams, where buyers pay for items online but never receive them; non-payment scams, where sellers ship goods but don't get paid; auction fraud, involving the misrepresentation of products on auction sites; and gift card fraud, where scammers request payment through prepaid cards.

Mikhail Matveev "allegedly used multiple ransomware variants to attack critical infrastructure around the world," said the DOJ.