[FIFA] EASF/LZMA (Seeking general decryption tips)

[JohnHudeski]

Hi,
I have never dealt with encryption outside regular zlib compression
I recently found thisblog claiming to have cracked the encryption but there is no tool available at the moment
I really have no clue as to how to apply this knowledge
Any tips?

Here is an example file of the before and after

[JohnHudeski]

correct link

Some guy managed to do it using the games exe

Code: Select all

fifa14 game running... 

is 'EASF'
call keygen addr (addr1);
check filesize; (example: ZSIZE: 432, SIZE=8640)
FileChunk(name:\"[...]%s\", block:%d, size:%dk) 
FileChunk(name:\"%s\", block:%d, size:%dk) 
get and read EASF filesize (432);
generate aes 128 key;
call genkey/setkey addr (addr2);
handshake with assetcryptokeys + keyID;
genkey/setkey to EASF file that is being read;
open handle/decrypted; (filesize = 8640)
closefile when needed (if);