Here is a problem. This serial number is encrypted on itself in hexadecimal.
If the number is 00000001 the result will be: 82C9E472
if the serial number is 00000002 the result will be 81D1E874
Serial number 00000003 result: 80D9EC76
we can clearly distinguish a logical e which eliminates the hash track. I can Share file that you need as well.
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Serial number 00000004 result has to be 79E1F078. Looks like a week obfuscation. The samples provided are not enough to crack the algorithm, but with more data it shloud be possible.