alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE psyBNC IRC Server Connection"; flow:from_server,established; content:"psyBNC@lam3rz"; depth:33; nocase; flowbits:isset,is_proto_irc; reference:url,en.wikipedia.org/wiki/PsyBNC; classtype:misc-activity; sid:2003302; rev:8; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_07_26;)