Patternized Botnet Flood Detector

Admin Thu Sep 01, 2011 3:21 pm

Code:: /* * -------------- ------ --- - - --- -------- --- - -- * Project Focus * Patternized Botnet Flood Killer * * by Tim Gunter / IcyLiquid * icyliquid@gmail.com * version 0.2 * -------------- ------ --- - - --- -------- --- - -- */ ; -------------- ------ --- - - --- -------- --- - -- ; Menus ; -------------- ------ --- - - --- -------- --- - -- menu menubar,status,channel,query,nicklist { Focus .Pattern Botnet Detection .. $+ $iif($pbn.act,Disable,Enable) :pbn.tog ..Configure:pbn.config } ; -------------- ------ --- - - --- -------- --- - -- ; Events ; -------------- ------ --- - - --- -------- --- - -- on *:start:{ pbn.hash load } on *:exit:{ pbn.hash save } on !@*:join:#:{ if ($pbn.act) { if (*.undernet.org !iswm $gettok($fulladdress,2,$asc(@)) && *~* iswm $gettok($fulladdress,1,$asc(@))) { var %hs = $pbn.hs($cid,$chan) var %nickpattern = $pbn.pattern($nick), %limit = $iif($hget(pbn.hash,limit),$ifmatch,3) if ($istok($pbn.get(%hs).bans,%nickpattern,32)) { ban -k $chan $nick 2 Pattern Botnet Flood - $nick } elseif ($pbn.count(%hs,%nickpattern).get >= %limit && !$pbn.isresync($cid,$chan,%nickpattern)) { echo -a 03* Flood detected in $+(03,$chan,) $+ , triggered by $+(03,$nick,) ( $+ $+(03,%nickpattern,) $+ ) pbn.channelstatus $cid $chan %nickpattern mode $chan +r ban -k $chan $nick 2 Pattern Botnet Flood - $nick $pbn.set(%hs,$addtok($pbn.get(%hs).bans,%nickpattern,32)).bans .timer 1 300 pbn.remove %nickpattern $cid $chan .timer 1 10 pbn.clear %nickpattern $cid $chan } $pbn.count(%hs,%nickpattern).inc } } } ; -------------- ------ --- - - --- -------- --- - -- ; Aliases ; -------------- ------ --- - - --- -------- --- - -- alias -l pbn.isresync { if ($hget(pbn.hash,$+($pbn.hs($1,$2),-resync))) { return $true } var %match = $+($pbn.hs($1,$2),*-count) var %items = $hfind(pbn.hash,%match,0,w), %item = 1, %limit = $hget(pbn.hash,limit), %highthresh = $calc(%limit * (1 + (2/3))) var %highmatches = 0 while (%item <= %items) { var %name = $hfind(pbn.hash,%match,%item,w) if ($gettok(%name,2,45) != $3) { if ($hget(pbn.hash,%name) > $calc(%limit * (2/3))) { inc %highmatches } } inc %item } if (%highmatches > 3 || %items > %highthresh) { hadd -u10 pbn.hash $+($pbn.hs($1,$2),-resync) 1 | echo -a 03* Mass join in $+(03,$2,) $+ , ignored due to $+(03,suspected resync,) } return $iif(%highmatches > 3 || %items > %highthresh,$true,$false) } alias pbn.channelstatus { var %match = $+($pbn.hs($1,$2),*-count) var %items = $hfind(pbn.hash,%match,0,w), %item = 1, %matches = 0, %limit = $hget(pbn.hash,limit) echo $2 02 $+ $2 $+ , %items 02 $+ $chr(123) $+ while (%item <= %items) { var %name = $hfind(pbn.hash,%match,%item,w) var %count = $hget(pbn.hash,%name) if (%count > %limit) { var %show = $+(,$gettok(%name,2,45),) } else { var %show = $gettok(%name,2,45) } echo $2 03 $+ %show 07=>04 $hget(pbn.hash,%name) inc %item } echo $2 02 $+ $chr(125) $+ } alias -l pbn.hash { if (!$hget(pbn.hash)) { hmake pbn.hash 100 } if ($1 == save) { var %active = $hget(pbn.hash,active) var %period = $hget(pbn.hash,period) var %limit = $hget(pbn.hash,limit) hfree pbn.hash | hmake pbn.hash 1 hadd pbn.hash active %active hadd pbn.hash period %period hadd pbn.hash limit %limit hsave -bo pbn.hash $+(",$scriptdir,pbn.hash.bin,") } if ($1 == load) { if ($exists($+(",$scriptdir,pbn.hash.bin,"))) { hload -b pbn.hash $+(",$scriptdir,pbn.hash.bin,") .remove $+(",$scriptdir,pbn.hash.bin,") } } } alias -l pbn.hs { return $+($2,~,$1) } alias pbn.tog { pbn.hash if ($hget(pbn.hash,active)) { hadd pbn.hash active 0 } else { hadd pbn.hash active 1 } echo -a 03* Pattern Botnet Detection is $iif($hget(pbn.hash,active),03enabled,04disabled) $+ . } alias pbn.config { pbn.hash var %res = $input(Please configure the detector. The format is <joins>:<seconds> where <joins> matching patterns seen within <seconds> seconds of each other result in a lock. $crlf,eoq,Configure,$+($hget(pbn.hash,limit),:,$hget(pbn.hash,period))) if ($numtok(%res,$asc(:)) == 2) { var %limit = $gettok(%res,1,$asc(:)) var %period = $gettok(%res,2,$asc(:)) if (%limit isnum && %period isnum) { hadd pbn.hash period %period hadd pbn.hash limit %limit echo -a 03* Set flood threshold at $+(03,%limit,) matching joins within $+(03,%period,) seconds. } else { echo -a 04* Invalid flood config. Format is <joins>:<seconds> where both arguments are numerical. } } } alias pbn.act { pbn.hash | return $hget(pbn.hash,active) } alias -l pbn.get { if ($isid && $0 && $prop) { pbn.hash return $hget(pbn.hash,$+($1,-,$prop)) } } alias -l pbn.count { if ($isid) { pbn.hash if ($prop == get) { var %pri = $replace($1-,$chr(32),-) return $pbn.get(%pri).count } elseif ($prop == inc) { var %pri = $replace($1-,$chr(32),-) hinc pbn.hash $+(%pri,-,count) 1 .timer 1 $iif($hget(pbn.hash,period),$ifmatch,5) pbn.count dec $1- } elseif ($prop == set) { var %pri = $replace($1- [ $+ [ $calc($0 - 1) ] ],$chr(32),-) $pbn.set(%pri,$ [ $+ [ $0 ] ]).count } } else { if ($1 == dec) { var %pri = $+($replace($2-,$chr(32),-),-count) hdec pbn.hash %pri 1 if ($hget(pbn.hash,%pri) <= 0) { hdel pbn.hash %pri } } } } alias -l pbn.set { if ($isid && $0 && $prop) { pbn.hash if ($0 > 1 && $2 != $null) { if ($3 != inc && $3 != dec) { hadd pbn.hash $+($1,-,$prop) $2 } else { var %cmd = $+(h,$3) %cmd pbn.hash $+($1,-,$prop) $2 } } else { hdel pbn.hash $+($1,-,$prop) } } } alias -l pbn.pattern { if ($isid && $0) { var %result, %j = $len($1), %i = 1 while (%i <= %j) { var %char = $mid($1,%i,1) if (%char isnum) { var %result = $+(%result,n) } elseif (%char isalpha) { if (%char isupper) { var %result = $+(%result,u) } if (%char islower) { var %result = $+(%result,l) } } else { var %result = $+(%result,e) } inc %i } return %result } } alias pbn.remove { var %hs = $pbn.hs($2,$3) if ($istok($pbn.get(%hs).bans,$1,32)) { var %newbans = $remtok($pbn.get(%hs).bans,$1,1,32) $pbn.set(%hs,%newbans).bans if (%newbans == $null) { mode $3 -r } echo -a 03* No longer banning pattern $+(03,$1,) on $+(03,$3,) } } alias -l pbn.clear { scid $2 var %nicks = $nick($3,0,a,oh), %i = 1 while (%i <= %nicks) { var %nick = $nick($3,%i,a,oh) if ($pbn.pattern(%nick) == $1) { ban -k $3 %nick 2 Pattern Botnet Flood - %nick } inc %i } echo -a 03* Finished clearing $+(03,$3,) scid -r }

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