I need some help with logical conditions in custom IPS signatures definitions.
I've made a set of custom IPS signatures for browser identification based on user agent strings. the were working ok, but recently MS decided that IE will not include string MSIE in some cases. So I'm making a new signature which will try to find MSIE or Trident (a string which only IE of major browsers uses).
Currently I have old signature which searches for MSIE and is working ok:
Now I made a new signature which should trigger on MSIE OR Trident string:
But the second signature never triggers. Why? It should trigger on the same user agent strings as first one and more.
I'm also curious if some other ppl are trying to make (and maintain) browser identification signatures. Or if someone knows a trustworthy source of regular expressions for user agents.
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