alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE AryaN IRC bot CnC1"; flow:established,to_server; dsize:<256; content:"PRIVMSG "; depth:8; content:"|20 3a 03|10OK|3a 03 20|"; within:30; classtype:command-and-control; sid:2017055; rev:1; metadata:created_at 2013_06_25, signature_severity Major, updated_at 2019_07_26;)