I searched through the Metasploit source code for User Agent Strings (starting with Mozilla/).

This is what I found:

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) Mozilla/4.0 (compatible; MSIE 6.1; Windows NT) Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0) Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Trident/4.0; SIMBAR={7DB0F6DE-8DE7-4841-9084-28FA914B0F2E}; SLCC1; .N Mozilla/4.0 (compatible; Metasploit RSPEC) Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/4.0.221.6 Safari/525.13 Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html) Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)

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