Trojan.gen

Something started filling up my hard disk and I started getting warnings that the disk was full and applications had to quit.  I scanned with NAV Version 11.1.2 (17) and it detected a Trojan Horse and Trojan.gen file.  It had the location of /Users/"myIDname"/Library/Caches/Java/cache/javapi/v.1.0/jar/count1.val-3424b410-2482041c.zip.  I was able to delete that with NAV.  But then what do I do to find the extra files it apparently was adding to my hard disk?  I noticed in my applications folder that there were aliases of the Applications folder titled Applications and Applications 2 and each one had imbedded several layers deep the same aliases.  I deleted those but it didn't seem to make any differenct in the space available on my hard disk.