The website, onlinesyschecker.xyz, is another fake and untrustworthy ".xyz" website, which appear to have been created by cybercriminals. The fake website is usually used a fake online store or phishing website which steal visitors online account credentials.
Online users who have been tricked by this website are asked to change their online account password to prevent unauthorized access to their accounts. And, to prevent their online accounts from being used fraudulently.