Feature request: Extract hashes

[kulbozz]

Is your feature request related to a problem?
Similar to the "Extract IP Address" function, I find myself often getting unstructured logs that has file hashes that I'd like to easily be able to extract for further processing and analysis. I've tried a regex and it's not dependable for larger data sets.

Describe the solution you'd like
Ability to extract MD5, SHA1, and SHA2 from desperate, unstructured data.

Describe alternatives you've considered
Regular expression is not dependable.

[n1474335]

Duplicate of #466