alert tcp any any -> any 6666:7000 (msg:"ET CHAT IRC USER Likely bot with 0 0 colon checkin"; flow:to_server,established; content:"USER|20|"; nocase; content:" 0 0 |3a|"; within:40; content:"|0a|"; within:40; flowbits:set,is_proto_irc; classtype:misc-activity; sid:2025066; rev:1; metadata:created_at 2013_07_13, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)