alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE IrcBot Fantasy Name Gen"; flow:established,to_server; http.host; content:"www.fantasynamegen.com"; fast_pattern; startswith; http.header_names; content:!"User-Agent"; reference:md5,ca6208a4dd3f1f846aaaf4a6cbcc66ea; classtype:trojan-activity; sid:2022655; rev:3; metadata:created_at 2016_03_24, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_29;)