Sorry I forgot the following:
Assume the following message text:
Hello member, we have huge ..... to stretch .. ! .... in her hand!
and you use
~((\bmember\b|\bstretch\b|\bhuge\b|\bher\b).*?(?!\g{-1})){4}~=>40
any other word - that is between 'member' and 'her', that would be match
an other regex that follows - will not be found!
The order of the word does not matter.
Thomas
Thomas Eckardt/eck <thomas.ecka...@thockar.com>
30.09.2009 20:38
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[Assp-test] Antwort: New Regex Features
Hilario,
just try to learn more about Perl regular expressions and your problem
could be solved (easy).
for example: you want to detect that (all) 4 words are in one mail:
member,stretch,huge,her and you want to weight this with 40 penalty
points - use:
~((\bmember\b|\bstretch\b|\bhuge\b|\bher\b).*?(?!\g{-1})){4}~=>40
the number in scope " {4} " tells the regex engines how many of that
words must be in the mail.
If you want to weigth different counts of these words, you can do the
following
~((\bmember\b|\bstretch\b|\bhuge\b|\bher\b).*?(?!\g{-1})){4}~=>80
~((\bmember\b|\bstretch\b|\bhuge\b|\bher\b).*?(?!\g{-1})){3}~=>40
~((\bmember\b|\bstretch\b|\bhuge\b|\bher\b).*?(?!\g{-1})){2}~=>20
~((\bmember\b|\bstretch\b|\bhuge\b|\bher\b).*?(?!\g{-1})){1}~=>10
Notice that you have to test the more complex first and the most simple
last.
Thomas
Hilario Fochi Silveira <assp-t...@soliton.com.br>
30.09.2009 16:06
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[Assp-test] New Regex Features
I just tested the new assp.pl 1.5.1.9 (0.0.09)
features and the concept of a total scoring value
as the sum of all valences(weights) of all found Regex is really nice.
It worked very well.
It will be wonderful if the concept can be
extended to all remaining spambomb regular
expression filters because about 100% of regex in
the BlackRe are really strict and
(blackReMaxHits) is going to be 1 in most cases.
However, there are lots of weaker "suspicious
phrases" that when present together in the same
mail will really assure it is a spam.
I always notice in my server that the Nigerian
(419) fraud are very successful to pass trough
ASSP because they are almost always sent by well
configured mails servers with valid mail accounts
and plain English text. They use phrases that
could be in any valid mail, but they do have an
"accent" (similar to what you notice when I write
in English, you may not be sure that I am
Brazilian, but you notice that my native language is not English)
Examples: (I used underscores bellow to let this mail pass my on filters)
abandoned_sum
dormant_account
I bring_you_greetings
next_of_kin
transfer_a_huge sum
utmost_secrecy
All of the above phrases are plain English, but
they are unusual, so alone, they are nothing more
than suspicious worlds, but if they come together
in the same mail than it is highly probable that this is a
Nigerian 419 advanced fee fraud
All the Best
Hilário Fochi Silveira
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