alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE IRC channel topic misc bot commands"; flowbits:isset,is_proto_irc; flow:established,from_server; content:"|3a|"; content:"|20|332|20|"; within:50; content:"|2023|"; within:20; content:"|203a|"; pcre:"/(\.aim\w*|ascanall)\s+\w/i"; classtype:trojan-activity; sid:2002386; rev:12; metadata:created_at 2010_07_30, signature_severity Major, updated_at 2019_07_26;)