Friday, January 14, 2005

Strange strings in user agents

(Cadenas extrañas en los user agents)

Seeing the logs of an IIS server, I have found a lot of user agents with very strange strings added to the normal user agent string.

For example:

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; ESB{A8417D9D-5087-4807-9D73-9E09290256CD})
Mozilla/4.0+(compatible;+MSIE+5.5;+Windows+NT+4.0;+H010818)
Mozilla/3.0 (compatible; HP Web PrintSmart 04b0 1.0.1.34)
Mozilla/4.5 (compatible; HTTrack 3.0x; Windows 98)

Searching in google, I found this web http://www.zytrax.com/tech/web/browser_ids.htm#mystery.

Most of them are Browser Help Objects and other are spyware



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