At this point you should assume your SS# is on the dark net. There are many ways to monitor your credit for free. No need to pay. Credit Karma does TU and Equifax and Experian has their own. All free. You do not need credit score to monitor credit file.
But also be aware that Equifax has a subsidiary where companies can report payroll data into and they accumulate the info. Apply for a car loan on a Sunday and they can verify your income. Some companies do, some do not. It saves the companies from responding to income verification inquiries. You can get a free copy of that info also.
If you want the form to request a copy, send me your email in a PM.
Note also if you apply for a job and ask for $80K and say your old job was paying $78K they might be able to look up and see you only earn $60K. In many states they cannot ask you, but they may still be able to find out. Not saying this can happen, but I can see it might, This is used mostly for income verification for credit.