Hi,

Code:
on @*:TEXT:*http*.exe*:#: if $badhttp($1-) { ban -k # $nick 2 Lamers not welcome. }
 [color:red]  [/color] 
alias badhttp return $regex($1,/http:\/\/([01]?\d\d?|2[0-4]\d|25[0-5])\.(?1)\.(?1)\.(?1)\/\S+\.exe/Sig)

Greets