Are Hackintoshs secure? Why did mac keep my wifi password

I tried to install something that I think may have been malware so I decided to erase the whole drive and do a fresh install. After a fresh install I went to set everything up and I noticed that even after I wiped the drive completely it was still connected to the wifi somehow. Any ideas as to what happened?

submitted by /u/InfamousArkansauce
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