Not Auto and User Generated Stats in Catalog view of SQL Server While querying

select * from sys.stats


I get this result



In the Books Online it is written 



But looking at results I can see that there are also some stats which are not created neither automatically nor by a user. Then how were this stats generated? Or who created them?

Thanks for your time!
Those are the statistics created when index was created. Quoting from BOL Statistics 


  The Query Optimizer creates statistics for indexes on tables or views when the index is created. These statistics are created on the key columns of the index. If the index is a filtered index, the Query Optimizer creates filtered statistics on the same subset of rows specified for the filtered index. For more information about filtered indexes, see Create Filtered Indexes and CREATE INDEX (Transact-SQL).