So far i still don't know what the Blob is, but the static $06 before could be a amount of Records, because the Bytes can be devided by 6, so perhaps the secure Block is devided into 6 pieces and then 6 crc's are taken or so, but still pure speculation and probably i'm thinking to far...
Also there is a static $24 at 0x23 within the Blob and also many Static Bytes within the Secure Block whats probably is because of the Cipher repetitiveness, else it would be mixed up much more and certainly not so much static Bytes would be left...
After comparing Saves together i don't think its compressed, because the static Bytes are always at the same Location even if the Secureblock is becoming bigger they stay there, if it would been compressed the Location would probably change if the Block is getting bigger...
So for me it looks like, as you progress in Game more Data is added below in a always same Pattern and the Block then encrypted with a repetitive Key, and because of that the Bytes are static and located always at the same Location, this also means the Key is static too and is probably saved in the xex, so it would be nice to get the xex to get the Key and the Algo used... ;)
Also the Blob could contain the secondary Hash in encrypted form probably encrypted the same way with the same Key or one taken from Plaintext, then there is anyway no going further before we have the Algo and the Key...
Does anyone have the Default.xex of this Game?