[Bro] user agent string data enrichment

Kris Secinfo krissecinfo at gmail.com
Thu Jan 5 09:03:52 PST 2017

I am new to Bro, and am trying to find a way to "enrich" the user agent
string to a more readable format. Is there a way that Bro can read the
value that is in the user agent string, compare it to a table of known
strings and present the "readable" value in a new field?
For example, I would want Bro to see

Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/55.0.2883.87 Safari/537.36

and add a new field that reads something to the effect of "Google Chrome
Version 55.0.2883.87 m (64-bit)"

Thanks in advance for any new tips/starting points offered!
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