You would need to reverse engineer the encryption.
Quote:
Originally Posted by KSV
Encryption scheme used is AES-128-CBC. i couldn't figure out the KDF (key derivation function) used to derive individual packet decryption key from global key using the salt block as shown above. KDF function is executed inside Alchemy VM (a method used to execute c code from ActionScript VM) which makes it very hard to reverse engineer from disassembled code.
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