Help tweaking my iRule

The iRule is slightly wrong in that it is trying to pull out a value of RU and then matching the IP address to the value which would never happen.  I would use the framework set in the support article and do something like this:

when SERVER_CONNECTED {
    set ipaddr [IP::remote_addr]
    set fromCountry [whereis $ipaddr country]
    if { [class match $fromCountry equals GeoIPOutboundBlockRussia] } {
         log local0. "Attacker IP [IP::client_addr]"  ;#  This can be removed/commented out if not required
         drop
    }
}