Random bytes before and after the plaintext

[nelolka]

I have a question. I have the encrypted (ZipCrypto) and compressed (deflated) zip archive contains one txt file like this:

*random 200-500 bytes*

*known text*
*known text*: *secret code*
*known text*

*random 200-500 bytes*

Is it possible to decrypt archives like this and get the secret code from txt? I have multiple examples with passwords, so I can analyze it.