<Emilie^17> hello Dangles
<Emilie^17> i'm a girl. are you a boy?
<Emilie^17> i see. i would like to know more about you
<Emilie^17> come and meet me in this chatroom: http://sexpartner.4u.hu
the spam bots always have the same type of name which is: upercase letter to start the name then the ^ and two random digits....
what would be the best way to go about filtering this?
In theory you could do a case-sensitive spamfilter using this (dunno how to make it do case-sensitive right now, or if it does case sensitive already):
^[A-Z][^\^ !@:]*\^[0-9]{2}!
But as mentioned you can ban innocent users. Why not whois some of the bots to find some user@host and/or realname patterns that can be used to narrow it down?
no pattern in the user@host and/or realname :/ so the capital letter at the start of the name then the ^ two random digits and the msgs..... have no fear about taking out innocent users... they are all warned against using a nick that matches that format
/spamfilter add u kill - some_nice_reason_here ^(?-i)[A-Z](?i)[a-z]*\^[0-9]{2}!
Or another action. Nice thing about kill is that an innocent user can understand (if you have a good reason field) what he/she can do to get on your net again.
no pattern in the user@host and/or realname :/
What does that mean? random garbage (dfskgfds)? Or again names...
Almost everything has a pattern, even random garbage is a pattern to me ;).
well sometimes the user is the same as the first part of the nick and other times its random garbage.... and the hosts come from all around the net and as far as i can tell it never uses the same host twice
I can say, that we have had issue with this bot for a long period of time. That with regard to us, the bot always starts with a capital letter. Then followed by lower case letters. Then either _ or ^, and then two numerics. Examples of: Susan^99 or Susan_99, but never susan^99 or susan_99. This bot origionally started only using the special character _ and then evolved to the other special character ^. We see both examples on our network.
I think ill try one of the previously sugested spamfilters sugested here.. But without the case sensitivity switch, just because of what we have observed over a year of these stupid bots.
Because we have been banning this bot through different automated means at the nick level for a long period of time, I forgot about what the origional spam message was. I think i'm going to set a filter at that level too, in case this bot evolves again into another pattern for the nicks.
Thank Syzop for directing me to this thread.
