Knoppix - Is it possible for the large files KNOPPIX, KNOPPIX1, KNOPPIX2 etc. to contain any user data?

I have an old Knoppix installation on a HDD with encrypted user data for which I have forgotten the password, i.e. I can no longer access my data in knoppix-data.aes. Unfortunately, I also cannot remember enough of the password such that a brute-force attack would be feasible. The HDD has two partitions SYSTEM and DATA. The latter is empty, but I noticed three very large files KNOPPIX, KNOPPIX1, and KNOPPIX2 with no filename extension inside SYSTEM. To my understanding, these files are not encrypted. - Is there any chance that either one of these three files may contain at least some of the data encrypted in knoppix-data.aes (such as digital photo albums)? - Can I simply browse/extract their content e.g. from within Ubuntu or Linux Mint, or are certain packages required which are exclusive to Knoppix?