alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE IRC Potential DDoS command 1"; flowbits:isset,is_proto_irc; flow:established,to_client; content:"floodnet "; pcre:"/floodnet ([0-9]{1,3}\.){3}[0-9]{1,3}|(tcp|syn|udp|ack|ping|icmp)(flood)? ([0-9]{1,3}\.){3}[0-9]{1,3}/i"; classtype:trojan-activity; sid:2002032; rev:22; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_07_26;)