The electrum FAQ solutions “How is the pockets encrypted?” as follows:
Electrum makes use of two separate ranges of encryption:
Your seed and personal keys are encrypted utilizing AES-256-CBC. The personal keys are decrypted solely briefly, when it is advisable signal a transaction; for this it is advisable enter your password. That is performed so as to reduce the period of time throughout which delicate data is unencrypted in your laptop’s reminiscence.
As well as, your pockets file could also be encrypted on disk. Word that the pockets data will stay unencrypted within the reminiscence of your laptop during your session. If a pockets is encrypted, then its password shall be required so as to open it. Word that the password is not going to be stored in reminiscence; Electrum doesn’t want it so as to save the pockets on disk, as a result of it makes use of uneven encryption (ECIES).
Pockets file encryption is activated by default since model 2.8. It’s meant to guard your privateness, but additionally to forestall you from requesting bitcoins on a pockets that you don’t management.
The above does not appear to me to be ample to decrypt the knowledge however I anticipate inspecting some Electrum supply code would supply the lacking dertails.
Trying to find decrypt electrum pockets file locates instruments ind data that is likely to be of some assist.