alert tcp $HOME_NET any -> $EXTERNAL_NET !6666:7000 (msg:"ET INFO IRC Nick change on non-standard port"; flow:established,to_server; dsize:<64; content:"NICK "; depth:5; content:!"twitch.tv|0d 0a|"; classtype:misc-activity; sid:2000345; rev:18; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_06, reviewed_at 2024_09_16;)