Update Indicators of Attachments to provide MD5, SHA1, and SHA256 hashes after Base64 decoding has been applied if applicable.
Breaking Changes
Hashes within the Indicators object of an attachment are generated based on the Base64 decode of an email attachment if the Content-Type-Encoding header of that attachment is Base64. Previous versions of this code generated the hashes based on the Base64 encoded string of the attachment content.