To answer my own question: the base64 encoded flag that can be found in the application does not need to be pre-processed before it can be passed to a decription tool.
For the rest, IDA is your friend.
To answer my own question: the base64 encoded flag that can be found in the application does not need to be pre-processed before it can be passed to a decription tool.
For the rest, IDA is your friend.